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Why does x.equals(y) throw an error in Java?
Why does this program throw an error? public class Program { public static void main(String[] args) { int x=5; int y=8; System.out.println(x.equals(y)); } }
3 odpowiedzi
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Konsel
equals() method is a method which is inherited from the Object class.
int, char, double and so on are primitive datatypes. Here you can use == to compare them.
But all of them have a wrapper class.
int -> Integer
char -> Character
double -> Double
and so on...
You can do this:
Integer x = 5;
Integer y = 8;
System.out.println (x.equals (y));
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Thank you very much! Sorry didn't realize that they wrote "Integer" instead of int...
And thanks for the explanation!
Now it works!
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But according to tutorialspoint it is as well made for int, double,...
https://www.tutorialspoint.com/java/number_equals.htm