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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. public static void main (String[] args) throws java.lang.Exception
  11. {
  12.  
  13. Test test = new Test();
  14.  
  15. System.out.print(test);
  16. }
  17.  
  18.  
  19. public static class Test {
  20.  
  21. public String toString() {
  22. return "Hello, world!";
  23. }
  24. }
  25. }
  26.  
  27.  
Success #stdin #stdout 0.11s 320576KB
stdin
Standard input is empty
stdout
Hello, world!