一个简单的死锁例子

最新推荐文章于 2022-04-21 10:30:48 发布

原创最新推荐文章于 2022-04-21 10:30:48 发布 · 421 阅读

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文章标签：

#thread #object #exception #class #string

一个简单的死锁例子，希望对大家有用。、

写法一：

public class DeadLock{
static private Object o1="123";
static private Object o2="234";
public static void main(String[] args){
  Thread t1 = new Thread1(o1,o2);
  Thread t2 = new Thread2(o1,o2);
   t1.start();
  t2.start();
}
}
class Thread1 extends Thread{
Object o1;
Object o2;
public Thread1(Object o1,Object o2){
  this.o1=o1;
  this.o2=o2;
}
public void run(){
  synchronized(o1){
   System.out.println("线程一1");
   try{
    sleep(2000);
   }catch(Exception e){
    System.out.println("出错1");
   }
   synchronized(o2){
    System.out.println("线程一2");
   }
  }
}
}
class Thread2 extends Thread{
Object o1;
Object o2;
public Thread2(Object o1,Object o2){
  this.o1=o1;
  this.o2=o2;
}
public void run(){
  synchronized(o2){
   System.out.println("线程二1");
   try{
    sleep(2000);
   }catch(Exception e){
    System.out.println("出错2");
   }
   synchronized(o1){
    System.out.println("线程二2");
   }
  }
}
}

写法二：

public class Deadlock {

public static void main(String args[]) {
final Object o1 = "asd";
final Object o2 = "qwe";
Thread t1 = new Thread() {

public void run() {
synchronized (o1) {
System.out.println("Thread 1: locked o1");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {

                         System.out.println("error");
                    }
synchronized (o2) {
System.out.println("Thread1: locked o2");
}
}
}
};

Thread t2 = new Thread() {
            public void run() {
synchronized (o2) {
System.out.println("Thread2: locked o2");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {

System.out.println("error");
}
synchronized (o1) {
System.out.println("Thread2: locked o1");
}
}
}
};

t1.start();
t2.start();
}
}