fork(1) download
  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.util.regex.*;
  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. String name = "KH1";
  14. if(name.matches("[K][H][1-9][0-9]?")){
  15. System.out.println("VALID NAME");
  16. }
  17. else{
  18. System.out.println("INVALID NAME");
  19. }
  20. }
  21. }
Success #stdin #stdout 0.1s 320512KB
stdin
Standard input is empty
stdout
VALID NAME