deadlock.java

来自「用java编写的一些初级代码」· Java 代码 · 共 57 行

class A
{
    synchronized void foo(B b)
    {
	String name = Thread.currentThread().getName();
	System.out.println(name+"entered A foo");
	try{Thread.sleep(1000);}catch(Exception e){
	    System.out.println(e.getMessage());}
	System.out.println(name+"try call B.last");
	b.last();
    }
    synchronized void last(){
	System.out.println("in A.last");
    }
}

public class Deadlock implements Runnable 
{
    A a=new A();
    B b=new B();
    Deadlock()
    {
	Thread.currentThread().setName("Main Thread");
	new Thread(this).start();
	a.foo(b);
	System.out.println("back in main thread"); 
    }
    public void run()
    {
	Thread.currentThread().setName("race Thread");
	new Thread(this).start();
	b.bar(a);
	System.out.println("back in other thread"); 
    }
    public static void main(String []args)
    {
	new Deadlock();
    }

}
class B
{
    synchronized void bar(A a)
    {
	String name = Thread.currentThread().getName();
	System.out.println(name+"entered B bar");
	try{Thread.sleep(1000);}catch(Exception e){
	    System.out.println(e.getMessage());}
	System.out.println(name+"try call A.last");
	a.last();
    }
    synchronized void last(){
	System.out.println("in A.last");
    }

}