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  1. When can we use Synchronized blocks in Java?

  2. How to check the memory used by a program in Java?

  3. How to print the maximum occurred character of a string in Java?

  4. How can we implement transparent JDialog in Java?

  5. What will happen if we directly call the run() method in Java?

  6. How can we implement auto-complete JComboBox in Java?

  7. User Thread vs Daemon Thread in Java?

  8. How to get the string representation of numbers using toString() in Java?

  9. Importance of wait(), notify() and notifyAll() methods in Java?

  10. Can a constructor be synchronized in Java?

  11. How to restrict the number of digits inside JPasswordField in Java?

  12. Can we call the wait() method without acquiring the lock in Java?

  13. Importance of a Dictionary class in Java?

  14. Can we override a start() method in Java?

  15. Object level lock vs Class level lock in Java?

  16. How can we add different font style items to JList in Java?

  17. Importance of @Override annotation in Java?

  18. How can we remove a selected row from a JTable in Java?

  19. Differences between wait() and sleep() method in Java?

  20. Can we synchronize a run() method in Java?
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