线程start()后可能不会立刻开始执行，只是设置为runable状态，具体取决于cpu的调度。
简写
new Thread(new Runnable() {
@Override
public void run() {
while(true)
System.out.println("running");
}
}).start();有三种方式：
1. 创建一个Thread的子类。
public class MyThread extends Thread {
private static int a = 0;
@Override
public void run() {
for(;;){
if(a >= 100){
return;
}
//Thread.yield();
System.out.println(Thread.currentThread().getName()+ " "+a);
a++;
}
}
}
public static void main(String[] args) {
MyThread myThread = new MyThread();
MyThread myThread1 = new MyThread();
MyThread myThread2 = new MyThread();
myThread.start();
myThread1.start();
myThread2.start();
}
2. 创建一个实现Runnable接口的子类。
public class MyRunnable implements Runnable {
private int a = 0;
@Override
public void run() {
for (int i = 0; i <= 100; i++) {
// try {
// Thread.sleep(3000);
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
System.out.println(Thread.currentThread().getName() + " " + i);
}
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
//创建线程执行目标类对象
MyRunnable myRunnable = new MyRunnable();
//创建线程对象，传入线程执行目标类对象
Thread t1 = new Thread(myRunnable,"花花");
Thread t2 = new Thread(myRunnable,"红红");
Thread t3 = new Thread(myRunnable,"兰兰");
//启动线程
t1.start();
t2.start();
t3.start();
}</code></pre></div> <div style="width: 100%; max-width: 996px; margin-top: 2px;">
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3. 创建一个实现Callable接口的子类。
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