@Test public void testUpcase() throws Exception { Assert.assertEquals("ANDY", immutable.upcase("andy")); }
public static String upcase(String str) { return str.toUpperCase(); }
Immutable { public static String upcase(String str) { return str.toUpperCase(); } }
Immutable { public static String upcase(String str) { return str.toUpperCase(); }  }
Immutable { public static String upcase(String str) { return str.toUpperCase(); }  static String upcase(String str); static void main(String[] args); }
Immutable { public static String upcase(String str) { return str.toUpperCase(); }  static String upcase(String str); static void main(String[] args);  }