java - java中线程初始化为null

Question

public class ThreadState {

    public static void main(String[] args){
            Thread t = new Thread(){
            public void run(){
                       // infinite loop
                       while (true) {
                        try {

                         Thread.sleep(1000);
                        }
                        catch (InterruptedException e) {
                        }

                        System.out.println("thread is running..."+Thread.currentThread().toString());
                       }

            }
        };
        t.start() ; 
        t = null ;
        while (true) {
              try {

              Thread.sleep(3000);
              }
              catch (InterruptedException e) {
              }
              System.out.println("thread is running..."+Thread.currentThread().toString());
        }   

    }
}

线程实例 t 被初始化为 null ..它仍然能够运行并在控制台上打印其详细信息。需要对此进行解释

Answer 1

Thread instance t is initialized to null

不，线程 变量 设置为空值。变量不是实例 - 值得绝对确保您理解这一点。

更改变量的值根本不会影响现有的 Thread 对象。