JAVAマルチスレッドデッドロックプログラムDemo

package thread;

/**
 * JAVA        
 * @author hero
 *
 */

class TestLock implements Runnable {
	
	private boolean flag;
	TestLock(boolean flag){
		this.flag = flag;
	}
	public void run() {
		
		if(flag){
			while(true){
				synchronized (MyLock.locka) {
					//    A --  B 
					System.out.println("if locka");
					synchronized (MyLock.lockb) {
						System.out.println("if lockb");
					}
				}
			}
		}else{
			while(true){
				synchronized (MyLock.lockb) {
					//     B --  A 
					System.out.println("else lockb");
					synchronized (MyLock.locka) {
						System.out.println("else locka");
					}
				}
			}
		}
	}
}
class MyLock{//  
	static Object locka = new Object();
	static Object lockb = new Object();
}

public class DeadLockTest8 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Thread t1 = new Thread(new TestLock(true));// A -- B 
		Thread t2 = new Thread(new TestLock(false));// B -- A 
		
		t1.start();
		t2.start();
	}

}