这个程序为什么不能实现死锁？？？？？？？？？？？？
class Dead implements Runnable
{
private boolean flag;
Dead(boolean falg)
{
this.flag = flag;
}
public void run()
{
if (flag)
{
while (true)
{
synchronized(Locks.obj1)
{
System.out.println("if 1 启动！");
synchronized(Locks.obj2)
{
System.out.println("if 2 启动!");
}
}
}
}
else
{
while (true)
{
synchronized(Locks.obj2)
{
System.out.println("else 2 启动！");
synchronized(Locks.obj1)
{
System.out.println("else 1 启动！");
}
}
}
}
}
}
class Locks//定义锁对象
{
static Object obj1 = new Object();
static Object obj2 = new Object();
}
class DeadLock
{
public static void main(String[] args)
{
Thread t1 = new Thread(new Dead(true));
Thread t2 = new Thread(new Dead(false));
t1.start();
t2.start();
}
}
------解决方案--------------------
找个视频看看吧，代码的问题还得自己去理解，梳理思路
------解决方案--------------------
因为Dead(flag)写错了
- Java code
class Dead implements Runnable{ private boolean flag; Dead(boolean flag) //你写成falg了 { this.flag = flag; } public void run() { if (flag) { while (true) { synchronized(Locks.obj1) { System.out.println("if 1 启动！"); synchronized(Locks.obj2) { System.out.println("if 2 启动!"); } } } } else { while (true) { synchronized(Locks.obj2) { System.out.println("else 2 启动！"); synchronized(Locks.obj1) { System.out.println("else 1 启动！"); } } } } }}class Locks//定义锁对象{ static Object obj1 = new Object(); static Object obj2 = new Object();}class DeadLock{ public static void main(String[] args) { Thread t1 = new Thread(new Dead(true)); Thread t2 = new Thread(new Dead(false)); t1.start(); t2.start(); }}
------解决方案--------------------
Dead(boolean falg)
{
this.flag = flag;
}
主要还是你不太小心了，这块有点小错误，应该都是flag。这样创建对象调用构造方法时值没有传就去，所以就是其boolean的默认值false。导致没法得到自己想要的结果，加油。
------解决方案--------------------
this.flag = flag;这里的flag都是指字段flag,逻辑上有问题，但语法上没问题