Code line with warning messages ?

> Error:(16, 9) cannot find symbol class Strin

errr
why can't you just double click on this text and cursor will jump to error line?

> Warning: Note: C:\Test\src\Wrong.java uses unchecked or unsafe operations.

Sun java compiler doesn't provide line number in this warning message. After double-click Idea will only open the file. Idea can't know where to jump.

Thank you for the reply.

More info: Because I read the book "Java Generics and Collections" by Maurice Naftalin, Philip Wadler, published by O'Reilly in October 2006.

I get jealous to read how they compile java classes with code line infomation in the warning messages as extracted below:

From Part I, Chapter 6, Section 6.2

source code:

class Promote {
  public static List<String> promote(List<Object> objs) {
    for (Object o : objs)
      if (!(o instanceof String))
        throw new ClassCastException();
    return (List<String>)(List<?>)objs; // unchecked cast
  }
  public static void main(String[] args) {
    List<Object> objs1 = Arrays.<Object>asList("one","two");
    List<Object> objs2 = Arrays.<Object>asList(1,"two");
    List<String> strs1 = promote(objs1);
    assert (List<?>)strs1 == (List<?>)objs1;
    boolean caught = false;
    try {
      List<String> strs2 = promote(objs2);
    } catch (ClassCastException e) { caught = true; }
    assert caught;
  }
}

compile result:

% javac -Xlint:unchecked Promote.java
Promote.java:7: warning: [unchecked] unchecked cast
found   : java.util.List
required: java.util.List<java.lang.String>
    return (List<String>)(List<?>)objs; // unchecked cast
                         ^
1 warning

Maybe, you know anything about javac command line, and teach me. Highly appreciate.