a command line argument, a comparison, an interesting result

[Carlos Failde]

The following program compiles

public class StringTest
{
  public static void main(String args[])
  {
    String s = args[0];
    System.out.println(s == "/?");
    System.out.println(s);
    System.out.println("/?");
  }
}

I ran the program with the command "java StringTest /?" at the DOS prompt
The output was:
false
/?
/?
Can someone explain this?
I want to know if a user uses the program with the parameter /?

[Asuthosh Borikar]

Try s.equals("/?") in place of s=="/?".
The "==" operator tests if the two object references point to the same object, which is not true in this case.
String class overrides the "equals" method in the Object class,
to compare the values of the two strings in question and return true if they are the same. It DOES NOT check to see if both the strings point to the same object in memory.

[Carlos Failde]

Ah yes of course. Much thanks