多线程死锁-蒲公英云

多线程死锁

死锁: 如果一个资源被一个线程占用，而且无法释放线程资源，导致其他线程无法访问这个字段，一直处于等待状态，这样就会形成线程死锁。

例子:

package com.thinkgem.jeesite.modules.face.java.thread;
public class DeadLockTest1 { 
    final static Object resouce1 = new Object();
    final static Object resouce2 = new Object();
    public static void main(String[] args) { 
        new Thread(new Runnable() { 
            @Override
            public void run() { 
                // TODO Auto-generated method stub
                synchronized (resouce1) { 
                    System.out.println("当前线程名称"+Thread.currentThread().getName());
                    try { 
                        Thread.sleep(3000);
                    } catch (InterruptedException e) { 
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    System.out.println("当前线程名称"+Thread.currentThread().getName()+"waiting");
                    synchronized (resouce2) { 
                        System.out.println("当前线程名称"+Thread.currentThread().getName()+"end");
                    }
                }
            }
        },"线程一").start();
        new Thread(new Runnable() { 
            @Override
            public void run() { 
                // TODO Auto-generated method stub
                synchronized (resouce2) { 
                    System.out.println("当前线程名称"+Thread.currentThread().getName());
                    try { 
                        Thread.sleep(3000);
                    } catch (InterruptedException e) { 
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    System.out.println("当前线程名称"+Thread.currentThread().getName()+"waiting");
                    synchronized (resouce1) { 
                        System.out.println("当前线程名称"+Thread.currentThread().getName()+"end");
                    }
                }
            }
        },"线程二").start();
    }
}