Hi everyone;
I wanted to write an article about a situation that caught my attention while I was working on interviews recently.
Let’s start by asking the output of the following code block first.
public class SwitchCaseExample {
public static void main(String[] args) {
long num = 5;
checkValue(num);
}
private static void checkValue(long num) {
switch (num) {
case 4 -> System.out.println("4");
case 5 -> System.out.println("5");
default -> throw new ClassCastException("can not accept");
}
}
}What do you expect to happen when we run this code block?
A) 5
B) Runtime Error
C) 4
D) Compile Time Error
E) ClassCastException
Simply copy and paste the question into an IDE to find the answer.
Answer is Compile Time Error
Reason
In Java, switch works only with 4 primitives and their wrappers, as well as with the enum type and String class.
This is
byte — Byte
short — Short
char — Character
int — Integer
Enum
String
I want to share this info for you
Thanx to reading
