Kaypler
站在大漠之巅，孤独凝望，远去的海市蜃楼，何时重现当年断壁残垣上的幻灭诗歌。
多线程死锁示例
/*死锁的常见现象：同步嵌套*/
class Test implements Runnable
{
private boolean flag;
Test(boolean flag){
this.flag = flag;
}
public void run(){
if(flag){
while(true)
synchronized(MyLock.locka){
System.out.println(Thread.currentThread().getName()+"..if locka....");
synchronized(MyLock.lockb) {
System.out.println(Thread.currentThread().getName()+"..if lockb....");
}
}
}
else{
while(true)
synchronized(MyLock.lockb)
{
System.out.println(Thread.currentThread().getName()+"..else lockb....");
synchronized(MyLock.locka)
{
System.out.println(Thread.currentThread().getName()+"..else locka....");
}
}
}
}
}
//定义两把不同的对象锁
class MyLock
{
public static final Object locka = new Object();
public static final Object lockb = new Object();
}
class DeadLockTest
{
public static void main(String[] args)
{
Test a = new Test(true);
Test b = new Test(false);
Thread t1 = new Thread(a);
Thread t2 = new Thread(b);
t1.start();
t2.start();
}
}