JAVA多线程简单使用

public static void main(String[] args) {

Runnable r = new Runnable(){
	public void run(){
	for (int i = 0; i < 20; i++) {
		System.out.println("执行了:"+i);
		}
 	} 
 };
new Thread(r).start();
new Thread(r).start();
new Thread(r).start();
}