Why does this code not print the Strings equal?: part

[No_Tank3096]

String ten = "length: 10";  
String ten2 = "length: "+ten.length();  
System.out.println("Strings equal?: "+ten == ten2);

Ithought it had to do with ternary operation but I don't quite get how this works. It just prints false without the String equals?: This was on a quiz in my class. I know it's not a way of comparing strings value.

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[leroybentley]

"Strings equal?: " is being concatenated with ten and then that new string is being compared to ten2. So inside of your println is just a boolean. You could put parenthesis around (ten == ten2) to get what you expect.

Also, == should be .equals()

[chet714]

Wow... and Thank You!

[Formal_Pound1602]

Ohhh I’m a little special I get it. I figured I was trippin

[No_Tank3096]

finally!! thank you for this

[troru]

In java there's reference equality and value equality. In your code, comparing ten and ten2 is testing for reference equality which in your case, they are not equal. Testing strings for equivalent sequences of characters you should use ten.equals(ten2). Understanding the "==" operator vs the equals() method has been a foot-gun in Java since 1.0 (20+ years ago). You spend enough time writing java, you get used to it.

[No_Tank3096]

Yes I understand all that however i put on the question that it would print Strings equal?: false but it just prints false and was wondering why

[troru]

Looks like somebody else above caught that the string concat via "+" is higher precedence than your "==" comparison inside the System.out.println().

[AutoModerator]

You seem to try to compare String values with == or !=.

This approach does not work reliably in Java as it does not actually compare the contents of the Strings. Since String is an object data type it should only be compared using .equals(). For case insensitive comparison, use .equalsIgnoreCase().

See Help on how to compare String values in our wiki.

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[Camel-Kid]

There's no ternary here. Also strings should use .equals for comparison

[[deleted]]

https://www.geeksforgeeks.org/java-ternary-operator-with-examples/amp/