TechieNET.org

This page collects some bad code that may not look so obiously bad for beginners. Beginners often struggle with the language syntax. They also have little knowledge about the standard JDK class library and how to make the best use of it. In fact we collected all examples from everyday junior code. And we modified the original code to give it example character and such that it highlights the problems. String concatenation String s = ""; for (Person p : persons) { s += ", " + p.getName(); } s = s.substring(2); //remove first comma