(String) or .toString()?

Question

I have a method with an Object o parameter.

In this method, I exactly know there is a String in \"o\" which is not null. There is no need t

Answer 1

Given that the reference type is an Object and all Objects have a toString() just call object.toString(). String.toString() just returns this.

• toString() is less code to type.
• toString() is less bytecode.
• casting is an expensive operation VS a polymorphic call.
• the cast could fail.
• Use String.valueOf( object ) which just calls object.toString() if its not null.