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  1. class Ideone {
  2. public static void main(String[] args) {
  3. String s1 = "hello";
  4. String s2 = "hello";
  5. String s3 = String.valueOf("hello");
  6. String s4 = new String("hello");
  7. System.out.println(s1 == s2);
  8. System.out.println(s1 == s3);
  9. System.out.println(s1 == s4);
  10. System.out.println(s2 == s3);
  11. System.out.println(s2 == s4);
  12. System.out.println(s3 == s4);
  13. s4 = s4.intern();
  14. System.out.println(s1 == s4);
  15. System.out.println(s2 == s4);
  16. System.out.println(s3 == s4);
  17. }
  18. }
Success #stdin #stdout 0.07s 380224KB
stdin
Standard input is empty
stdout
true
true
false
true
false
false
true
true
true