package threadbook.ch07;

public class StaticBlock extends Object {

public static synchronized void staticA() {

System.out.println("entering staticA()");

try { Thread.sleep(5000); }

catch ( InterruptedException x ) { }

System.out.println("leaving staticA()");

}

public static void staticB() {

System.out.println("entering staticB()");

synchronized ( StaticBlock.class ) {

System.out.println(

"in staticB() - inside sync block");

try { Thread.sleep(2000); }

catch ( InterruptedException x ) { }

}

System.out.println("leaving staticB()");

}

public static void main(String[] args) {

Runnable runA = new Runnable() {

public void run() {

StaticBlock.staticA();

}

};

Thread threadA = new Thread(runA, "threadA");

threadA.start();

try { Thread.sleep(200); }

catch ( InterruptedException x ) { }

Runnable runB = new Runnable() {

public void run() {

StaticBlock.staticB();

}

};

Thread threadB = new Thread(runB, "threadB");

threadB.start();

}

}