java - Junit test error No test found -

i used junit 3 , when wrote code got error

assertionfailederror : no test found

import junit.framework.testcase; import junit.runner.*;  public class teststd extends testcase {     student s;      public void setup() {         s = new student("asjfa");     }      public void testemail() {         try {             s.setemail("kuku");             asserttrue(false);         } catch (emailisinvalid ex) {             asserttrue(true);             system.out.println("exception caught. email invalid");          }     }      public void teardown() {     } } 

your test method should start lowercase t. should public void testemail(). picked junit.