package L1602;public class TestThread2 { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Runner2 r = new Runner2();
Thread t1 = new Thread(r);
Thread t2 = new Thread(r);
t1.setName("线程1");
t2.setName("线程2");
t1.start();
t2.start();
}
}class Runner2 implements Runnable {
public void run() {
for (int i = 0; i < 20; i++) {
String s = Thread.currentThread().getName();// 获得当前对象的名称
System.out.println(s + ":" + i);
}
}
}我看视频上是交替输出两个线程,但我运行时是显示完线程1后再显示线程2,为何没有交替输出?
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Runner2 r = new Runner2();
Thread t1 = new Thread(r);
Thread t2 = new Thread(r);
t1.setName("线程1");
t2.setName("线程2");
t1.start();
t2.start();
}
}class Runner2 implements Runnable {
public void run() {
for (int i = 0; i < 20; i++) {
String s = Thread.currentThread().getName();// 获得当前对象的名称
System.out.println(s + ":" + i);
}
}
}我看视频上是交替输出两个线程,但我运行时是显示完线程1后再显示线程2,为何没有交替输出?
运行结果不确定的,
你可以试下在循环里sleep()下!
在线程的循环中sleep添加:try {
Thread.sleep(100) ;
} catch (InterruptedException exc) {}
之前运行时是先完全运行完线程1后在运行线程2,但在dos下调试能明显看出交替,在eclipse中就不是.
以下是一个例子,尝试在dos下运行和软件中运行,效果为何不同public class TestThread1 { public static void main(String[] args) {
// TODO Auto-generated method stub
Runner1 r = new Runner1();
r.start(); for (int k = 0; k < 100; k++) {
System.out.println("aaaaa----" + k);
}
}
} class Runner1 extends Thread {
public void run() {
for (int i = 1; i < 100; i++) {
System.out.println("b----" + i);
}
}
}