Java 使用匿名内部类在方法内部定义并启动线程

亦凉 2022-03-21 18:46 186阅读 0赞

**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。**

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)

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