TIOBE - Java Coding Standard

Rule: Design41

Synopsis:	Caught exception is rethrown, original stack trace may be lost
Language:	Java
Severity Level:	2
Category:	Design

Description:

Throwing a new exception from a catch block without passing the original exception into the new Exception will cause the true stack trace to be lost, and can make it difficult to debug effectively.

public class Foo {
    void good() {
        try{
            Integer.parseInt("a");
        } catch(Exception e){
            throw new Exception(e);
        }
    }
    void bad() {
        try{
            Integer.parseInt("a");
        } catch(Exception e){
            throw new Exception(e.getMessage());
        }
    }
}