一个普通Java程序包含哪些线程？？

package com.java.threads;

import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.util.Arrays;

public class Demo01 {

    public static void main(String[] args) {
        // 获取Java线程管理MXBean
        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        // 获取运行的线程
        ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(false, false);
        Arrays.stream(threadInfos).forEach(threadInfo -> {
            System.out.println("thread-id="+threadInfo.getThreadId() + ", thread-name="+threadInfo.getThreadName());
        });
    }

}

运行结果如下：

thread-id=6, thread-name=Monitor Ctrl-Break
thread-id=5, thread-name=Attach Listener
thread-id=4, thread-name=Signal Dispatcher
thread-id=3, thread-name=Finalizer
thread-id=2, thread-name=Reference Handler
thread-id=1, thread-name=main

• Monitor Ctrl-Break：这是IDEA特有的监控线程

• Attach Listener：接收外部命令，返回处理结果

• Signal Dispatcher：分发处理发送信号给JVM的线程

• Finalizer：调用对象finalize方法的线程

• Reference Handler：清除引用的线程

• main：主线程，用户程序入口