Java 实例 - 查看线程是否存活
以下实例演示了如何通过继承 Thread 类并使用 isAlive() 方法来检测一个线程是否存活:
TwoThreadAlive.java 文件
publicclassTwoThreadAliveextendsThread{publicvoidrun(){for(inti = 0; i < 10; i++){printMsg();
}}publicvoidprintMsg(){Threadt = Thread.currentThread();
Stringname = t.getName();
System.out.println("name=" + name);
}publicstaticvoidmain(String[]args){TwoThreadAlivett = newTwoThreadAlive();
tt.setName("Thread");
System.out.println("before start(), tt.isAlive()=" + tt.isAlive());
tt.start();
System.out.println("just after start(), tt.isAlive()=" + tt.isAlive());
for(inti = 0; i < 10; i++){tt.printMsg();
}System.out.println("The end of main(), tt.isAlive()=" + tt.isAlive());
}}
以上代码运行输出结果为:
before start(), tt.isAlive()=false just after start(), tt.isAlive()=true name=main name=Thread name=main name=main name=main name=main name=main name=main name=main name=main name=main name=Thread name=Thread name=Thread name=Thread name=Thread The end of main(), tt.isAlive()=true name=Thread name=Thread name=Thread name=Thread