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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.util.regex.*;
  5. import java.lang.*;
  6. import java.io.*;
  7.  
  8. /* Name of the class has to be "Main" only if the class is public. */
  9. class Ideone
  10. {
  11.  
  12. private static void test(String s) {
  13. Pattern p = Pattern.compile("((?:sin|cos|tan|cot|sec|csc)(?:h)?)\\s*(?:[\\^](\\d+)\\s*)?(?:((?<=\\s|\\()[a-z0-9]+)|[(]((?<=\\s|\\()[a-z0-9]+)[)])");
  14. Matcher m = p.matcher(s);
  15. if (m.find()) {
  16. for(int i = 1 ; i <= m.groupCount() ; i++ ) {
  17. System.out.println(m.group(i));
  18. }
  19. }
  20. System.out.println("----");
  21. }
  22. public static void main (String[] args) throws java.lang.Exception
  23. {
  24. test("sinh^3(h)");
  25. test("sinh h");
  26. test("sin(h)");
  27. test("sinh(h)");
  28. }
  29. }
Success #stdin #stdout 0.1s 320320KB
stdin
Standard input is empty
stdout
sinh
3
null
h
----
sinh
null
h
null
----
sin
null
null
h
----
sinh
null
null
h
----