Java: Define and start threads inside methods using anonymous inner classes

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();
    }
}