下面的代码展示了在一个方法中,通过匿名内部类定义一个Thread,并Override它的run()方法,之后直接启动该线程。
这样的代码可用于在一个类内部通过另起线程来执行一个支线任务,一般这样的任务并不是该类的主要设计内容。
package com.zj.concurrency;
 
public class StartFromMethod {
    private Thread t;
    private int number;
    private int count = 1;
 
    public StartFromMethod(int number) {
       this.number = number;
    }
 
    public void runTask() {
       if (t == null) {
           t = new Thread() {
              public void run() {
                  while (true) {
                     System.out.println("Thread-" + number + " run " + count
                            + " time(s)");
                     if (++count == 3)
                         return;
                  }
              }
           };
           t.start();
       }
    }
 
    public static void main(String[] args) {
       for (int i = 0; i < 5; i++)
           new StartFromMethod(i).runTask();
    }
}
结果:
Thread-0 run 1 time(s)
Thread-0 run 2 time(s)
Thread-1 run 1 time(s)
Thread-1 run 2 time(s)
Thread-2 run 1 time(s)
Thread-2 run 2 time(s)
Thread-3 run 1 time(s)
Thread-3 run 2 time(s)
Thread-4 run 1 time(s)
Thread-4 run 2 time(s)