output clarification

[m prabhu]

  System.out.format("%s", new Long("123"));  

will it compile and run without exception.please explain the result.

[Milan Sutaria]

how about running it?
answer is ... yes it will run without any error. '%s' invokes the toString() method on the object & so the output will be 123
[ July 22, 2008: Message edited by: Milan Sutaria ]

[m prabhu]

public class Trial {
   public static void main(String[] args){
        System.out.format("%s", new Long("123"));
    }     
}
    

when compiled:giving the following error.

symbol : method format(java.lang.String,java.lang.Long)
location: class java.io.PrintStream
System.out.format("%s", new Long("123"));
1 error

Please explain

[Denis Bogdanov]

What Java version do you have? The class PrintStream has the method format() in java 5.

[Sandeep Bhandari]

Use the same version of java as the one of the exam for which you are preparing