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Java Java Basics Perfecting the Prototype String Equality

Posted by Kevin Hippert
Kevin Hippert
413 Points

I don't get it why this should be wrong?

Why should this be wrong and why I get an error message?

Equality.java 
// I have imported a java.io.Console for you, it is named console. 
String firstExample = "hello";
if (firstExample.equals("secondExample")){
  console.printf("first is equal to second");
  System.exit(0);
}
String secondExample = "hello";
String thirdExample = "HELLO";

3 Answers

Steve Hunter
Steve Hunter
57,712 Points

You have used variables before you have declared them in your code.

So, move the whole if statement below the variable declarations. 

// I have imported a java.io.Console for you, it is named console. 
String firstExample = "hello";
String secondExample = "hello";
String thirdExample = "HELLO";

if (firstExample.equals(secondExample)){
  console.printf("first is equal to second");
  System.exit(0);
}

That way, the compiler knows about secondExample before you use it in your code. (and see the comment below)

Steve.

Steve Hunter
Steve Hunter
57,712 Points

You also need to remove the double quotes from around "secondExample" - it is a variable, not a string.

Make sense?

Steve.

Kevin Hippert
Kevin Hippert
413 Points

wtf? This won't work.. :D?

            // I have imported a java.io.Console for you, it is named console. 
String firstExample = "hello";
String secondExample = "hello";
String thirdExample = "HELLO";


if (firstExample.equals(secondExample)){
  console.printf("first is equal to second");
  System.exit(0);
}
Steve Hunter
Steve Hunter
57,712 Points

Odd. Looks fine - let me get into the challenge - I'll be right back!

Steve Hunter
Steve Hunter
57,712 Points

Sorry - that's me missing your added line. You don't need the System.exit(0) at all. Delete that line.

Apologies for not seeing that before.

Steve.

Kevin Hippert
Kevin Hippert
413 Points
Kevin Hippert
Kevin Hippert
413 Points

I get it. Thanks Steve for the quick help. :)

Steve Hunter
Steve Hunter
57,712 Points

No problem! :-)

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

Sorry - that's me missing your added line. You don't need the System.exit(0) at all. Delete that line.

Apologies for not seeing that before.

Steve.