TICS Coding Standard Viewer 
TIOBE Software Quality Framework
Print-friendly version
©TIOBE Software www.tiobe.com
 
TIOBE - Java Coding Standard
Search

Rule:  StringandStringBuffer10Checked automatically with code checker

Synopsis:String.trim().length()==0 is an inefficient way to validate an empty String
Language:Java
Severity Level:4
Category:StringandStringBuffer


Description:
String.trim().length() is an inefficient way to check if a String is really empty, as it creates a new String object just to check its size. Consider creating a static function that loops through a string, checking Character.isWhitespace() on each character and returning false if a non-whitespace character is found.
public class Foo {
    void bar(String string) {
        if (string != null && string.trim().size() > 0) { 
		    doSomething();
        } 
    }
}