This class is used to bind together the supplied class and class file bytes in a single ClassDefinition object. These class provide methods to extract information about the type of class and class file bytes of an object. This class is a subclass of java.lang.Object class.
Class declaration:
public final class ClassDefinition extends Object
Constructor:
| Constructor | Description |
|---|---|
| ClassDefinition(Class<?> theClass, byte[] theClassFile) | This constructor creates a new instance of ClassDefinition class by binding the supplied class and class file bytes. |
Methods:
| Method | Description |
|---|---|
| getDefinitionClass() | This method is used to get the class type of this class |
| getDefinitionClassFile() | This method Is used to get the array of bytes that contains the new class file. |
Example 1: Java program to create new ClassDefinition object
Java
// Java program to create new ClassDefinition objectimport java.lang.instrument.ClassDefinition; // driver classpublic class GFG { // demoClass static class demoClass { void msg() { System.out.println("GeeksForGeeks"); } } // main method public static void main(String[] args) { try { // creating demoClass object demoClass cls = new demoClass(); // creating object of supplied class Class<?> theClass = cls.getClass(); // creating array of class files byte[] classFiles = { 0 }; // creating a new ClassDefinition object ClassDefinition classdefinition = new ClassDefinition(theClass, classFiles); System.out.println( "ClassDefinition object successfully created"); } catch (Exception e) { e.printStackTrace(); } }} |
Output
ClassDefinition object successfully created
Example 2: Java program to illustrate ClassDefinition class methods
Java
// Java program to illustrate ClassDefinition class methodsimport java.lang.instrument.ClassDefinition; // driver classpublic class GFG { // demoClass static class demoClass { void msg() { System.out.println("GeeksForGeeks"); } } // main method public static void main(String[] args) { try { // creating demoClass object demoClass cls = new demoClass(); // creating object of supplied class Class<?> theClass = cls.getClass(); // creating array of class files byte[] classFiles = { 0 }; // creating a new ClassDefinition object ClassDefinition classdefinition = new ClassDefinition(theClass, classFiles); // printing the class System.out.println( classdefinition.getDefinitionClass()); // printing array of bytes that contain class // files System.out.println( classdefinition.getDefinitionClassFile()); } catch (Exception e) { e.printStackTrace(); } }} |
Output
class GFG$demoClass [B@448139f0
