Classes And Objects In Java Oracle

For Oracle 11g and upwards, these loaded Java classes can be compiled to native code. Java classes that run in managed environments such as applets and Enterprise JavaBeans do not use or need a main() method. How does a program destroy an object that it creates? Exercises. You get even more cooperation and efficiency when the objects are united by a common superclass. An unauthenticated, remote attacker can exploit this, via a crafted object payload, to bypass the ClassFilter. , programmers analyze a problem and create objects to solve. This may cause two or more threads to access the same fields or objects at same time. Java is an object-oriented language, and this is very similar to C++. 2 (57 ratings) Course Ratings are calculated from individual students' ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately. All objects, including arrays, implement the methods of t. July 16, 2004 - 11:05 am UTC. In Eclipse, when you run a Java Application, the results are displayed in a new window. Object for the classes in the user interface example above. Objects are pieces of data that you have uploaded to Google Cloud Storage. Description: You can iterate through any collection object by using Iterator object. , title, icon, buttons, content-pane public class MyGUIProgram extends Frame { // private variables. The Objects resource represents an object within Google Cloud Storage. Students will learn. Java Stored Procedures, Step by Step. Classes and Objects in java - Class consist of blocks, constructor, variables, methods, inner classes and inner interfaces Notepad++ (6) Oracle (18. ; Loader on which JVM calls loadClass is known as initiating loader. u dont want to go third class. In other words, it is the topmost class of java. Write a Java class Complex for dealing with complex number. Classes This section shows you the anatomy of a class, and how to declare fields, methods, and constructors. When developing applications in. The fact that the JVM has been recreated and the Java Classes reloaded, only those Java Classes that should be loaded have been loaded. Your class must have the following features: Instance variables :. It is abstract because it does not give a form/shape, but a definition on how concrete classes would look. Improved Reliability and Flexibility : Object-oriented system promise to be far more reliable than traditional systems, primarily because new behaviors can be "built" from existing objects. Java's object cloning mechanism allows an attacker to manufacture new instances of a class by copying the memory images of existing objects rather than by executing the class's constructor. A typical Java program creates many objects, which as you know, interact by invoking methods. Managing memory explicitly is tedious and error-prone. 3 and have existing Java classes loaded to a schema called ABC. The declaration of an object of class ObjectMapping must be part of each class extending StorableObject. Blog dedicated to Oracle Applications (E-Business Suite) Technology; covers Apps Architecture, Administration and third party bolt-ons to Apps Wednesday, October 31, 2007 Drop invalid java classes after 11. commonly used Oracle data types and Java types. jar clickatell14. This tutorial teaches you how to declare classes, describe attributes via fields, describe behaviors via methods, initialize objects via constructors, and instantiate objects from classes. This situation typically occurs in J2EE containers and applets. Colin Archibald 90,573 views. java files) containing Java classes (alternatively, other JVM languages can also be used to create class files). So what do I have in those. Home » Interview Questions » Core Java Interview Questions and Answers Core Java interview questions help you in preparing for java based interviews. Java SE: Programming I, This entry-level course is aimed at programmers who are new to Java and who need to learn its concepts, language constructs, and data types. Convert this data object into its default Java object type. ClassLoader class itself? (classic "who will load the loader" bootstrap issue). The Java Tutorials have been written for JDK 8. Please note that we can use synchronized keyword in the class on. Uses of Class java. Oracle Spatial Component Is INVALID After Upgrade To 12. assertEquals(java. A typical Java program creates many objects, which as you know, interact by invoking methods. This constructor accepts an argument that equals to the required size, and. The new license permits certain uses, such as personal use and development use, at no cost -- but other uses authorized under prior Oracle. A Java class is published by creating and compiling a call specification for it. com) and he asked me to help. An object consists of the data you want to store along with any associated metadata. Contains classes that define objects. It's probably fair to say that on the whole, the volatile keyword in Java is poorly documented, poorly understood, and rarely used. In addition, Java executed by the Oracle JVM benefits from efficient garbage collection and the server's thread management capabilities. My first thought is to confirm which database version you're using. By Paul Krill. In this Java Tutorial For Beginners video I am going to show how to use Classes and Objects in Java, OO Programming Concepts, Creating Objects and Object Reference Variables, Differences between. getConfigurations() is slow, taking 3 or more seconds 7172749 Xrender: class cast exception in 2D code running an AWT regression test 8017629 G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages 8022582 relax response flags checking in sun. Any class that will be directly called from SQL or PL/SQL must be published. Call Java Oracle Functions From Java program. java object typecasting one object reference can be type cast into another object reference. How do I convert the oracle object to the java object. Beginning with version 8i, the Oracle database includes a fully functional Java Virtual Machine, Oracle JVM. Where is the java bytecode for loaded java classes stored within an oracle database? Specifically, is there a view or table I can use to obtain the raw bytes for java class schema objects within Or. Suggested: • Either: o Oracle Academy Course - Java Fundamentals o Oracle Academy Course - Java Foundations • Previous experience with at least one programming language Suggested Next Courses. A typical Java program creates many objects, which as you know, interact by invoking methods. The first step is to obtain a java. But a class is not an object any more than a blueprint. To load Java objects into a schema other than the currently connected user, CREATE ANY PROCEDURE and CREATE ANY TABLE Oracle privileges are required for the loadjava user. The concepts are easier to understand by comparison with the Standard MBean concept. And, by the way, objects are the concrete entity built upon that abstraction. But it's giving me the next exception: Exception in thread "main" java. The Zend Java Bridge also allows you to access user-defined Java classes from within a PHP script, so long as these are included in the Java classpath. Class is the core of Java language. To access a database from a Java application, you must first provide the code to register your installed driver with your program. Which of the following defines a driver class? Contains a main method and other static methods. public class Assert extends java. I will present how to do this step by step Create View Object and Application Module. Objects in Java. Java class: Create or Replace Java Source Named "Hello" As public class. This is a Java issue, so I suggest searching for Java solutions that allow you to load multiple versions of a JAR into the same JVM. all currently supported by Oracle, may use escape analysis optimization to allocating on the stack instead) and all variables of object types are references. Represents the object name of an MBean, or a pattern that can match the names of several MBeans. And like static class methods, a static nested class cannot refer directly to instance variables or methods defined in its enclosing class: it can use them only through an object reference. "I have measured out my life with coffee spoons" ~ T. Get java class content from oracle database. Updated on 20-May-2003. We can run abstract class in java like any other class if it has main() method. 1) Last updated on JUNE 18, 2019. It's probably fair to say that on the whole, the volatile keyword in Java is poorly documented, poorly understood, and rarely used. Explain Garbage collection mechanism in Java. Which of the following is true? Mark for Review (1) Points Instance variable names may only contain letters and digits. HR Schema (Comes with Oracle Database) ADF Entity Object Example: I have already created an Entity Object and its Java classes of Country table. This feature can be used to allow Java components to access JavaFX objects as they would access any other implementation of an interface. It provides two methods to iterate. Ufter the upgrade database Oracle 11g | Invalid Java Class Objects April 26, 2015 · by anargodjaev · in Oracle İntroduction · Leave a comment Issue: Java Class/Classes became INVALID after the upgrade of the database. ClassLoader class itself? (classic "who will load the loader" bootstrap issue). Contains classes that define objects. Java Fundamentals - Course Description. BUT there were zero invalids when the system went live. A static variable is attached with the class as a whole and not with specific instances of a class. *; public class Jkoppe { } And save this file as Jkoppe. This query will return a oracle object type. What is Object and class in Java? Defining a Class and Class Members. compareTo(x). The compareTo method needs to satisfy the following conditions. Any class that will be directly called from SQL or PL/SQL must be published. 0_67 from Oracle Corporation or Java Version 1. The TopLink map (. classes, etc. Cloneable to indicate that they can be cloned. Beginning with version 8i, the Oracle database includes a fully functional Java Virtual Machine, Oracle JVM. An important point to note is, when subclass object is created, a separate object of super class object will not be created. Objects This section covers creating and using objects. Obtain valuable Core Java Skills And Java Certification. I left the values blank because I would have to load 1400 entries because every material has a different value for the char's. Syntactically and semantically, this distinction between compile-time class expressions and runtime class objects makes JavaScript similar to Java code. JVM calls java. We use byte code modification to map Java classes to PL/SQL Object Types. Section 4 Oracle Java Fundamental Quiz static methods, and classes that define objects. In Java, Scanner is an utility class in java. This idiom uses the intrinsic lock associated with the instance of a private final java. And in Java, each class goes to its own file. com) and he asked me to help. Setting Up to Use Reflection. These are not well represented in professional environments. 1) Last updated on APRIL 04, 2019. The following are steps used to extend View Objects:. static void: assertEquals(java. Java classes that run in managed environments such as applets and Enterprise JavaBeans do not use or need a main() method. In Java, the new keyword is used to create new objects. 0 Replies Latest reply on Nov 16, 2016 2:32 PM by Gg - 10285709-Oracle How to create java STRUCT classes for Oracle database PLSQL type objects in jdeverloper 12c. GridGain Software Documentation Getting Started; What Is Ignite? What Is Gridgain? Concepts. Instance variable in Java are used by Objects to store their states. sql to recompile all invalid objects script multiple times, those invalid JAVA CLASS object_type objects are persistent in SYS user. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available. Uses of Class java. As mentioned previously, a class provides the blueprints for objects. We have auditing turned on. When Oracle decided to open source the Java EE platform via the Eclipse Foundation, the Eclipse Enterprise for Java (EE4J) project was formed. I have a java object (a value object) that has most of those properties that are defined in that oracle object. Static Nested Classes. An important point to note is, when subclass object is created, a separate object of super class object will not be created. By the way: the JDeveloper project makes use of two libraries (associated with the project through the last wizard operation): Unmarshall XML document into Java object graph. Noncompliant Code Example (Boolean Lock Object). My problem is, that right now I have more than 1500 invalid Java classes and I don't know how to clean this mess up:. This may cause two or more threads to access the same fields or objects at same time. A class in Java, can be defined as a template or blue print, describes the states or behaviours, that the objects or its type support. This object can then be used in a way similar to how other objects are. Throws: java. In our course, you'll learn SQL, as well as the common Java programming language. Java Swing Tutorial Explaining the JFrame class. NoClassDefFoundError: sun/io/CharToByteConverte. In this case oracle let developer to show these attribute by extending View Objects. In object-oriented programming technique, we design a program using objects and classes. The easy way would've been to simply loadjava all the classes to the new schema. Another way objects work together is to define methods that take other objects as parameters. Out of this close relationship between Oracle and Java emerges an important technology for Oracle developers: Java stored procedures. At the end, the program prints the grand total. It compares two objects and if they are the same object in memory and present in the same memory location, the expression returns true else it returns false. We have auditing turned on. Applies to: Oracle Spatial and Graph - Version 10. Java Heap space is used by java runtime to allocate memory to Objects and JRE classes. In fact the Java components do not even need to know that they are dealing with JavaFX objects under the hood. Blog dedicated to Oracle Applications (E-Business Suite) Technology; covers Apps Architecture, Administration and third party bolt-ons to Apps Wednesday, October 31, 2007 Drop invalid java classes after 11. We've already encountered polymorphism made possible by. An object consists of the data you want to store along with any associated metadata. OracleDriver. In other words, it is the topmost class of java. How do I convert the oracle object to the java object. util package, which is created for text parsing purpose. Out of this close relationship between Oracle and Java emerges an important technology for Oracle developers: Java stored procedures. This query will return a oracle object type. Because a singleton instance is associated with the class loader that is used to load it, it is possible to have multiple instances of the same class in the Java Virtual Machine. Call Java Oracle Functions From Java program. Any class that will be directly called from SQL or PL/SQL must be published. Technically, these instances are different classes that are independent of each other. INSERT, UPDATE, and DELETE Operations Using JDBC Prepared Statements. Once I cleared the invalids, the application started working. Are classes loaded as soon as the JVM starts, or only when an object is created? Ans: jvm starts when we use java. fundamental, java, oracle, quiz. Consequently, programs must never synchronize on objects that may be reused. The components added to the frame are referred to as its contents; these are managed by the contentPane. Obtain valuable Core Java Skills And Java Certification. To get ahead in your career, enroll in ed2go's Oracle SQL and PL/SQL Developer + Java Programmer Course today. finalize() - Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. mwp file) contains the information required t o represent database tables as Java classes. Methods in the java. The hasNext() method returns true if the iteration has more elements. This disqualifies java. Misuse of synchronization primitives is a common source of concurrency issues. We've already encountered polymorphism made possible by. Subsequent sections of. To become a storable object, the Customer class extends the class StorableObject. 0, autoboxing and unboxing feature convert primitives into objects and objects into primitives automatically. All classes in the Java programming language have an inheritance relationship. Java SE 8 Fundamentals, This Java SE 8 Fundamentals training enables those with little or no programming experience to learn object-oriented programming using the Java language. What is an object in Java. This constructor accepts an argument that equals to the required size, and. 0 is Java Specification Request 243 ( JSR 243 ). How to generate Java classes from ADF AppModule & Entity Objects In this section, we have described an example of how to create anF AppModuleImpl and EntityImpl Java classes from ADF AppModule and EO object Pre-Requisite: Version JDeveloper 12. To load Java objects into a schema other than the currently connected user, CREATE ANY PROCEDURE and CREATE ANY TABLE Oracle privileges are required for the loadjava user. So what do I have in those. It comes pretty handy with many usages. It optionally has up to two Java source files — a view object class and a view row class. Tests if this stack is empty. Frame; // Using Frame class in package java. A Period represents a value such as “3 months and 1 day,” which is a distance on the timeline. Java Programming - Become A Java Programmer And How To Get Your Oracle Java SE 7 Programmer Associate Certification. Oracle Data Types. The Oracle extensions include features for standard Oracle data types and Oracle objects. What is Object and class in Java? Defining a Class and Class Members. Driver interface. -- OS: RHEL5, Oracle 10. Creating an Object. Returns true if the stack is empty. Object implements java. So the problem was with INVALIDS. Three kinds of objects are involved in the event-handling: a source, listener(s) and an event object. Java is also known as a strong Object oriented programming language (OOPS). Are classes loaded as soon as the JVM starts, or only when an object is created? Ans: jvm starts when we use java. bin" When Compiling JAVA Objects in Oracle Posted by Dear DBA Frank in Dear DBA on Feb 23, 2017 10:03:34 AM. Java Swing Tutorial Explaining the JFrame class. Many real-world Java 2 Platform. Wrapper Classes in Java A Wrapper class is a class whose object wraps or contains a primitive data types. Why do we need wrapper classes in Java?. The Oracle Java Certification series was designed to help you prepare to take and pass the qualifying exam for this certification, Java SE 8 Programmer I (1Z0-808). Web Programming For Business Php Object Oriented Programming With Oracle. Object methods are also shown because they are inherited and implemented by all of its subclasses, which is every class in the Java API libraries. Which of the following defines a driver class? Contains a main method and other static methods. The Java Tutorials have been written for JDK 8. "I have measured out my life with coffee spoons" ~ T. The use of Java wrapper classes is. version upgrade that typically invalidates all PL/SQL and Java. The easy way would've been to simply loadjava all the classes to the new schema. Related Oracle Commands: JAVA - CREATE. All classes have at least one constructor. Python Classes/Objects. It provides two methods to iterate. Fix the program called SomethingIsWrong shown in Question 1. View Objects are quires that bring data seen in EBS web pages, a lot of attributes offered by oracle in each view object, but sometimes you need to show additional attributes. Objects and classes allow programs to specify methods and variables in one portion of code and use them again wherever necessary. Object implements java. This is in contrast to the other classes we’ve looked at so far. The introduction to object-oriented concepts in the lesson titled Object-oriented Programming Concepts used a bicycle class as an example, with racing bikes, mountain bikes, and tandem bikes as subclasses. Object first need to convert into binary stream and after this, binary stream can store in database with blob data type. OracleDatumWithConnection Specified by: toJdbc in class Datum Returns: this object. 0_45 from Sun Microsystems Inc. New Java class-access Filtering Interface The jdk. By Paul Krill. Unlabelled Answerd Quiz Using Object Classes and Driver Classes. INSERT, UPDATE, and DELETE Operations Using JDBC Prepared Statements. But I already ran the utlrp. Objects in Java. What is an object in Java An entity that has state and behavior is known as an object e. Driver interface. You can make most of your classes persistent in a JDO environment. Since: JDK1(Oracle) See Also:. ***Checked for relevance on 19-Nov-2015*** Symptoms. This object can then be used in a way similar to how other objects are. They are one per primitive type: Boolean, Byte, Character, Double, Float, Integer, Long and Short. A class is a blueprint for the object. In this page, we will learn about Java objects and classes. In some of Oracle's implementations of the Java Virtual Machine, a reference to a class instance is a pointer to a handle that is itself a pair of pointers: one to a table containing the methods of the object and a pointer to the Class object that. This includes classes that represent the entities in your application domain, utility classes that model other data, and abstractions you need to support your application’s functionality. Java eschews certain low-level constructs such as pointers and has a very simple memory model where objects are allocated on the heap (while some implementations e. libGDX is a cross-platform Java game development library. Variables which are defined without the STATIC keyword and are Outside any method declaration are Object specific and are known as instance variables. It is abstract because it does not give a form/shape, but a definition on how concrete classes would look. HR Schema (Comes with Oracle Database) ADF Entity Object Example: I have already created an Entity Object and its Java classes of Country table. Java object can be saved in any database after serialization of objects. The Object class is beneficial if you want to refer any object whose type you don't know. Explain Garbage collection mechanism in Java. But while I learn more stuff about Java I. Object declared within the class instead of the intrinsic lock of the object itself. What is an object in Java An entity that has state and behavior is known as an object e. 0, autoboxing and unboxing feature convert primitives into objects and objects into primitives automatically. OracleDatumWithConnection Specified by: toJdbc in class Datum Returns: this object. How to Recompile Invalid Java Class Objects in Portal 10. Timestamp The internal data for this object is stored as a eleven byte array in the super class' storage area. The AWT's event-handling classes are kept in package java. The DML operations of INSERT and UPDATE—that is, the write operations—are done by means of the prepareStatement() method of the Connection object created above. This is implemented as part of the Comparator interface, and the typical use is to define one or more small utility classes that implement this, to pass to methods such as sort() or for use by sorting data structures such as TreeMap and TreeSet. Serializable. The primitive wrapper classes are found in the Java API. Contains classes that define objects. *; public class Jkoppe { } And save this file as Jkoppe. (*) Label: fundamental, java, oracle, quiz, section 2. - Duration: 7:00. Save hundreds by combining both the OCA Java SE 8 Programmer and OCP Java SE 8 Programmer courses on the accelerated 7-day combined Oracle OCA and OCP Java SE 8 Programmer Certification course. A class can contain fields and methods to describe the behavior of an object. sql already, those. import java. Python classes provide all the standard features of Object Oriented Programming: the class inheritance mechanism allows multiple base classes, a derived class can override any methods of its base class or classes, and a method can call the method of a base class with the same name. House is the object. Timestamp The internal data for this object is stored as a eleven byte array in the super class' storage area. The Oracle Java Certification series was designed to help you prepare to take and pass the qualifying exam for this certification, Java SE 8 Programmer I (1Z0-808). In other words, it is the topmost class of java. Register the JDBC drivers. This course of study engages students with little programming experience. Today I want to write about dynamic view object which allow me to change its data source (SQL query) and attributes at run time. What is an object in Java An entity that has state and behavior is known as an object e. The Java Certification was conducted by Sun and the most popular keyword was "SCJP". bin" When Compiling JAVA Objects in Oracle Posted by Dear DBA Frank in Dear DBA on Feb 23, 2017 10:03:34 AM. classes, etc. And from the best practice of oracle upgrade from 10g to 11g, it said should not have any invalid objects in sys or system schema. The Oracle extensions include features for standard Oracle data types and Oracle objects. public class Assert extends java. Classes and Objects in java - Class consist of blocks, constructor, variables, methods, inner classes and inner interfaces Notepad++ (6) Oracle (18. The Node objects created have a ownerDocument attribute which associates them with the Document within whose context they were created. Three kinds of objects are involved in the event-handling: a source, listener(s) and an event object. The third and last Pillar of Object-Oriented Programming that we'll explore is polymorphism. In Java everything is encapsulated under classes. The AWT's event-handling classes are kept in package java. What is an object in Java An entity that has state and behavior is known as an object e. Also, java supports multiple threads to be executed concurrently. In addition to XML files, view objects are defined by up to two Java classes: The view object class - an instance of this class is a view object instance; that is, a particular reference to a Oracle ADF view object definition within an application module definition. The TransferObjectFactory uses reflection to dynamically obtain the class information for the Transfer Object class and construct a new Transfer Object instance. The DML operations of INSERT and UPDATE—that is, the write operations—are done by means of the prepareStatement() method of the Connection object created above. Section 2 Oracle Java Fundamentals Quiz. Following are some important observations about abstract classes in Java. An object-based application in Java is based on declaring classes, creating objects from them and interacting between these objects. Objects can contain arbitrary amounts and kinds of data. Java Tutorial: Introduction to Java Hello World Program Variables and Data types More about data types Displaying text using print and println Displaying text using printf Java Comments Naming conventions for Identifiers Mathematical operations in Java Taking input from the user Classes and Objects Introduction to object oriented programming. dropping java class. Java How to Program, 10/e, Late Objects Version provides a clear, simple, engaging and entertaining late objects introduction to Java programming. Applies to: Oracle Spatial and Graph - Version 10. Out of this close relationship between Oracle and Java emerges an important technology for Oracle developers: Java stored procedures. The fact that the JVM has been recreated and the Java Classes reloaded, only those Java Classes that should be loaded have been loaded. I mean java classes, which was loaded via loadjava tool with -r -s -v -g parameters. STRUCT or by defining custom Java Classes to represent the Oracle Object Type. u dont want to go third class. And from the best practice of oracle upgrade from 10g to 11g, it said should not have any invalid objects in sys or system schema. A Java program may contain multiple classes that have main methods, which means that the VM needs to be explicitly told which class to launch from. sql already, those. In this Java Tutorial For Beginners video I am going to show how to use Classes and Objects in Java, OO Programming Concepts, Creating Objects and Object Reference Variables, Differences between. 0 (Doc ID 1917134. The object is owned by its original uploader, who will always retain OWNER permission on it. Contains classes that define objects. Serializable in class. The Object class is the parent class of all the classes in java by default. The acquisition of Sun Microsystems by Oracle Corporation was completed on January 27, 2010. The third and last Pillar of Object-Oriented Programming that we'll explore is polymorphism. I have in my Entity class a field which is a CLOB type which represents a column in my Oracle. clone() method returns a new object that is a copy of the current object. java file contains several (inner) public static classes: so apparently everything is alright after all. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: