执行程序时无法理解tryLock方法

我正在学习Java并发性,并尝试ReentrantLock类方法。当尝试tryLock()方法并运行示例程序时,它并没有正常工作。根据定义,如果锁可用,则tryLock()返回true,线程将获得锁&如果不是,则返回false。

所以在我的代码中,我有两个线程,如果t1锁定,那么它将执行if部分操作,t2将执行else操作。我是不是错过了什么?请帮忙。

代码:

import java.util.concurrent.locks.ReentrantLock;

class ReentrantLockMethods extends Thread{ 
    ReentrantLock l = new ReentrantLock();  
    
    public ReentrantLockMethods(String name) {
        super(name);
    }   

    public void run() {     
        if(l.tryLock()) {           
            System.out.println(Thread.currentThread().getName()+"....got Lock and performing safe operations");
            try {
                Thread.sleep(5000);
            }
            catch(InterruptedException e) {}
            l.unlock();         
        }
        else {
            System.out.println(Thread.currentThread().getName()+ "....unable to get Lock hence, performing alternate operations");
        }
    }
}

public class ReentrantLockDemo1 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ReentrantLockMethods t1 =  new ReentrantLockMethods("First Thread");
        ReentrantLockMethods t2 =  new ReentrantLockMethods("Second Thread");       
        t1.start();
        t2.start();
    }

}

实际输出:

First Thread....got Lock and performing safe operations
Second Thread....got Lock and performing safe operations

预期输出:

First Thread....got Lock and performing safe operations
Second Thread....unable to get Lock hence, performing alternate operations

或

Second Thread....got Lock and performing safe operations
First Thread....unable to get Lock hence, performing alternate operations