ขอปรึกษาเรื่อง Deadlock หน่อยครับ ว่าทำอย่างไรจึงจะเกิด - Java ครับ

public class Deadlock5{
    /*private static final Object obj1 = "resource1";
    private static final Object obj2 = "resource2";*/
    
    //semaphore
    private static final Semaphore obj1 = new Semaphore(1);
    private static final Semaphore obj2 = new Semaphore(1);
    
    public static void main(String[] args) throws Exception {
      
        obj1.acquire();
        obj2.acquire();
        Thread t1 = new Thread(new p1());
        Thread t2 = new Thread(new p2());
        t1.start();
        t2.start();
    }
    public static class p1 implements Runnable {
       
        @Override
        public void run(){
            
           
            try{
                
                synchronized(obj1){
                    System.out.println("Thread1 acquired lock on resource1");
                    Thread.sleep(100);
                    obj1.release();
                   
                synchronized(obj2){
                System.out.println("Thread1 acquired lock on resource2");
                System.out.println("finish");
            }
                }
               
            }
            catch(InterruptedException e){System.out.println("Process interrupted....");}
            
                
            }
        }
    
    public static class p2 implements Runnable {
        @Override
        public void run(){
           
                try{
                    
                    synchronized(obj2){
                System.out.println("Thread2 acquired lock on resource2");
                Thread.sleep(100);
                obj2.release();
                
                 synchronized(obj1){
                System.out.println("Thread2 acquired lock on resource1");
                System.out.println("finish");
            }
                    }
                    
                  
                }
                catch(InterruptedException e){System.out.println("Process interrupted....");}
           
            }
        }
        
    }