java 字符串鎖

package com.example.demo.controller;

public class StringLock {
    
    
    public void method(String p) {
        // new String("字符串常量")
        synchronized (p.intern()) {
            try {
               
                    System.out.println("當前線程 : " + Thread.currentThread().getName() + "開始");
                    Thread.sleep(3000);
                    System.out.println("當前線程 : " + Thread.currentThread().getName() + "結束");
               
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
         
        Thread t1 = new Thread(new Runnable() {
            @Override
            public void run() {
                StringLock stringLock = new StringLock();
                stringLock.method("123");
            }
        }, "t1");
        Thread t2 = new Thread(new Runnable() {
            @Override
            public void run() {
                StringLock stringLock1 = new StringLock();
                stringLock1.method("123");
            }
        }, "t2");

        t1.start();
        t2.start();
    }

}