Scanner requires int error. (Switch-case)

Question

import java.util.Scanner;
class G2Ex3 {
public static void main (String args[]) {

Scanner in = new Scanner (System.in);
System.out.print("Enter password: ");
String pw = in.nextLine();

switch (pw) {
case "JRU":
case "jru":
System.out.println("Password Accepted!");
break;
default:
System.out.println("Invalid Password!");
}
}

}

My code, as you can see has nothing to do with integers. My question is why does the program keeps telling me that it only founds java.lang.String and that it requires int? Thank you.

What version of Java? You couldn't use switch with string(s) prior to Java 7. — Elliott Frisch, Dec 11 '13 at 01:00
In case of passwords, I really recommend the use of char. It's a bit better than string, and you can use switch-case with it as well. — iWumbo, Dec 11 '13 at 01:04
Thanks for the answer @Frisch, I really do think its because of the version of the Java I'm using. By the way, thanks for the answer @iWumbo! — Arnold Toong, Dec 11 '13 at 01:14

Michał Rybak · Accepted Answer · 2013-12-11T01:06:43.840

0

You cannot switch over String, unless you're using Java 7.

In Java 6 or lower, allowed arguments to switch are: int, char, short, byte or an Enum.

edited Dec 11 '13 at 01:06

answered Dec 11 '13 at 01:00

Michał Rybak

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you can use it with jdk 7. – Kick Buttowski Dec 11 '13 at 01:01
I've tried using char and it too don't work. I guess I have to switch to the higher version of Java then. Thank you! – Arnold Toong Dec 11 '13 at 01:16
@MichałRybak I've changed the - case "JRU": , into - case 'JRU' because its a chartype. But why does it still gives me the error? – Arnold Toong Dec 11 '13 at 01:33
`char` type contains a single character, therefore 'JRU' is not a valid `char`. I suggest reading more about [types in Java](http://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html) to get a solid base before trying to write more complex code. – Michał Rybak Dec 11 '13 at 01:43
check your java version. http://www.java.com/en/download/help/version_manual.xml – Kick Buttowski Dec 11 '13 at 01:44
@SotiriosDelimanolis but how will use it? I've looked for examples on the internet, but its too complicated to follow – Arnold Toong Dec 11 '13 at 01:59

Scanner requires int error. (Switch-case)

1 Answers1