My Java Tips

One should try avoiding null pointer exception. In case of coding an application that needs high degree of reliability, don't take risks. I will present an example.

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Check the following piece of code.

Java Code:

private boolean isNullString(String string) {
return (string.equals(""));
}

It seems a normal piece of code. But still there's a hidden trap here. What is the string which is passed is null? So try to rephrase the code as given below.

Java Code:

private boolean isNullString(String string) {
return ("".equals(string));
}

This should work now without any null pointer exceptions.