How do you handle deadlock in Java?

public class Deadlock{
 public static void main(String[] args){
   final String s1 = "anjana";
   final String s2 = "shankar";
 
   Thread t1 = new Thread() {
     public void run(){
       synchronized(s1){
        System.out.println("Thread 1: Locked s1");
        try{ Thread.sleep(100);} catch(Exception e) {}
      synchronized(s2){
        System.out.println("Thread 1: Locked s2");
        }
     }
  }
};
 Thread t2 = new Thread() {
      public void run(){
       synchronized(s2){
        System.out.println("Thread 2: Locked s2");
        try{ Thread.sleep(100);} catch(Exception e) {}
      synchronized(s1){
       System.out.println("Thread 2: Locked s1");
      }
    }
  }
};
 
t1.start();
t2.start();
}
}