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java.lang.reflect.Proxy.getInvocationHandler() Method Example
Description
The java.lang.reflect.Proxy.getInvocationHandler(Object proxy) method returns the invocation handler for the specified proxy instance.
Declaration
Following is the declaration for java.lang.reflect.Proxy.getInvocationHandler(Object proxy) method.
public static InvocationHandler getInvocationHandler(Object proxy) throws IllegalArgumentException
Parameters
proxy − the proxy instance to return the invocation handler for.
Returns
the invocation handler for the proxy instance.
Exceptions
IllegalArgumentException − if the argument is not a proxy instance.
Example
The following example shows the usage of java.lang.reflect.Proxy.getInvocationHandler(Object proxy) method.
package com.tutorialspoint; import java.lang.reflect.InvocationHandler; import java.lang.reflect.Method; import java.lang.reflect.Proxy; public class ProxyDemo { public static void main(String[] args) throws IllegalArgumentException { InvocationHandler handler = new SampleInvocationHandler() ; SampleInterface proxy = (SampleInterface) Proxy.newProxyInstance( SampleInterface.class.getClassLoader(), new Class[] { SampleInterface.class }, handler); Class invocationHandler = Proxy.getInvocationHandler(proxy).getClass(); System.out.println(invocationHandler.getName()); } } class SampleInvocationHandler implements InvocationHandler { @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { System.out.println("Welcome to TutorialsPoint"); return null; } } interface SampleInterface { void showMessage(); } class SampleClass implements SampleInterface { public void showMessage(){ System.out.println("Hello World"); } }
Let us compile and run the above program, this will produce the following result −
com.tutorialspoint.SampleInvocationHandler
java_reflect_proxy.htm
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