Why does this code doesn't work?

Question

I'm making some basic commands just to learn. The thing is that I'd made this "if" command but it is true only when B is 10. However, if I spell "caca" it doesn't activates. I would like to know if there is anything I am doing wrong and u can help me. The only thing that's missing here is the print code but I haven't wrote it as it's not necessary for the question
String A = sc.nextLine ();
int B = sc.nextInt ();
if ( A == "caca" || B >= 10){

Answer 1

The problem is A == "caca".
For Strings you need the equals() method:

If(A.equals("caca") || B >= 10)

Here is an article about the difference between == and equals(): https://www.google.de/amp/s/www.geeksforgeeks.org/difference-equals-method-java/amp/

Answer 2

A.equals("caca") -> return false
!(false) = true
A.equals("caca") -> return true
!(true) = falsbe

if(!(A.equals("caca"))){
System.out.println("not equal");
}

Answer 3

Another example:

4 == 3 -> would return false
4 != 3 -> would return true
!(4 == 3) -> would return true

Answer 4

Denise Roßberg Thx, i've already corrected it. And if I want to make a difference ( != )for Strings, I have to write !("caca") or there is another word for it?

Answer 5

Sometimes you are missing some small but important parts, so I would recommend looking through your code to check for any mistakes before you press the run button.