- Java.lang Package classes
- Java.lang - Home
- Java.lang - Boolean
- Java.lang - Byte
- Java.lang - Character
- Java.lang - Character.Subset
- Java.lang - Character.UnicodeBlock
- Java.lang - Class
- Java.lang - ClassLoader
- Java.lang - Compiler
- Java.lang - Double
- Java.lang - Enum
- Java.lang - Float
- Java.lang - InheritableThreadLocal
- Java.lang - Integer
- Java.lang - Long
- Java.lang - Math
- Java.lang - Number
- Java.lang - Object
- Java.lang - Package
- Java.lang - Process
- Java.lang - ProcessBuilder
- Java.lang - Runtime
- Java.lang - RuntimePermission
- Java.lang - SecurityManager
- Java.lang - Short
- Java.lang - StackTraceElement
- Java.lang - StrictMath
- Java.lang - String
- Java.lang - StringBuffer
- Java.lang - StringBuilder
- Java.lang - System
- Java.lang - Thread
- Java.lang - ThreadGroup
- Java.lang - ThreadLocal
- Java.lang - Throwable
- Java.lang - Void
- Java.lang Package extras
- Java.lang - Interfaces
- Java.lang - Errors
- Java.lang - Exceptions
- Java.lang Package Useful Resources
- Java.lang - Useful Resources
- Java.lang - Discussion
Java.lang.Class.cast() Method
Description
The java.lang.Class.cast() method casts an object to the class or interface represented by this Class object.
Declaration
Following is the declaration for java.lang.Class.cast() method
public T cast(Object obj)
Parameters
obj − This is the object to be cast.
Return Value
This method returns the object after casting, or null if obj is null.
Exception
ClassCastException − if the object is not null and is not assignable to the type T.
Example
The following example shows the usage of java.lang.Class.cast() method.
package com.tutorialspoint; import java.lang.*; class A { public static void show() { System.out.println("Class A show() function"); } } class B extends A { public static void show() { System.out.println("Class B show() function"); } } public class ClassDemo { public static void main(String[] args) { ClassDemo cls = new ClassDemo(); Class c = cls.getClass(); System.out.println(c); Object obj = new A(); B b1 = new B(); b1.show(); // casts object Object a = A.class.cast(b1); System.out.println(obj.getClass()); System.out.println(b1.getClass()); System.out.println(a.getClass()); } }
Let us compile and run the above program, this will produce the following result −
class com.tutorialspoint.ClassDemo Class B show() function class com.tutorialspoint.A class com.tutorialspoint.B class com.tutorialspoint.B
java_lang_class.htm
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