Demo of IllegalMonitorStateException | java.lang package

Figure1

Class Hierarchy:

IllegalMonitorStateException is a class present in java.lang.* package and has following class hierarchy.

Figure2

Description:

Thrown to indicate that a thread has attempted to wait on an object's monitor or to notify other threads waiting on an object's monitor without owning the specified monitor.

Since:

JDK1.0

Example:

	package com.javamultiplex.java.lang.exceptions;
	/**
	* @author Rohit Agarwal
	* @version 1.0
	* @category java.lang/Exception
	* @since JDK 1.0
	*/
	class MyThreadNew implements Runnable {
	@Override
	public void run() {
	display();
	}
	private void display() {
	try {
	/*
	* IllegalMonitorStateException will be thrown because without
	* owning object's monitor we are calling wait method.
	*/
	wait(1000);
	} catch (InterruptedException e) {
	e.printStackTrace();
	}
	}
	}
	public class IllegalMonitorStateExceptionDemo {
	public static void main(String[] args) {
	MyThreadNew thread = new MyThreadNew();
	Thread th = new Thread(thread);
	th.start();
	}
	}

view raw IllegalMonitorStateExceptionDemo.java hosted with ❤ by GitHub

Output:

Figure3

References:

https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalMonitorStateException.html

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