Suppose you have thread and it is in static synchronized method and now can thread enter other static synchronized method from that method in java?




Yes, here when thread is in static synchronized method it must be holding lock on class’s class object and using that lock thread can enter other static synchronized method.




Program >
class MyRunnable1 implements Runnable{
   @Override
   public void run(){
          method1();
   }
  
   static synchronized void method1(){
          System.out.println("static synchronized void method1() started");
          method2();
          System.out.println("static synchronized void method1() ended");
   }
  
   static synchronized void method2(){
          System.out.println("in static synchronized method2()");
   }
  
  
}
/** Copyright (c), AnkitMittal JavaMadeSoEasy.com */
public class MyClass {
   public static void main(String args[]) throws InterruptedException{
          MyRunnable1 myRunnable1=new MyRunnable1();
          Thread thread1=new Thread(myRunnable1,"Thread-1");
          thread1.start();       
   }
}
/*OUTPUT
static synchronized void method1() started
in static synchronized method2()
static synchronized void method1() ended
*/
If you note output, when thread was in static synchronized method1() it was holding lock on class’s class object and using that lock thread entered static synchronized method2().



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Situation based questions -

Suppose you have 2 threads (Thread-1 and Thread-2) on same object. Thread-1 is in synchronized method1(), can Thread-2 enter synchronized method2() at same time?

Suppose you have 2 threads (Thread-1 and Thread-2) on same object. Thread-1 is in static synchronized method1(), can Thread-2 enter static synchronized method2() at same time?

Suppose you have 2 threads (Thread-1 and Thread-2) on same object. Thread-1 is in synchronized method1(), can Thread-2 enter static synchronized method2() at same time?

Suppose you have thread and it is in synchronized method and now can thread enter other synchronized method from that method?

Suppose you have thread and it is in static synchronized method and now can thread enter other static synchronized method from that method?

Suppose you have thread and it is in static synchronized method and now can thread enter other non static synchronized method from that method?

Suppose you have thread and it is in synchronized method and now can thread enter other static synchronized method from that method?

Suppose you have 2 threads (Thread-1 on object1 and Thread-2 on object2). Thread-1 is in synchronized method1(), can Thread-2 enter synchronized method2() at same time?

Suppose you have 2 threads (Thread-1 on object1 and Thread-2 on object2). Thread-1 is in static synchronized method1(), can Thread-2 enter static synchronized method2() at same time?




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