Why not working java code?

Question

package mainData;

public class Hello{
    public void Hello(String sData, int ... nAges){
        for(int x : nAges){
            System.out.println(sData + " " + x);
        }
    }

    public static void main(String args[]){
        Hello ages = new Hello("Age: ", 5, 6, 7, 8);
    }
}

When i change the constructor (Hello > Hello2) this code running without problem. But why this code not working?

Answer 1

You are defining a method called Hello of return type void . A constructor does not have a return type; use the following instead:

public Hello(String sData, int ... nAges) {
    for (int x : nAges) {
        System.out.println(sData + " " + x);
    }
}

Answer 2

Remove void from your constructor, and it should work . If you give a return type , then you are creating a method, not a constructor.

I suspect that your code doesn't run without a problem when you rename Hello to Hello2 . It may compile and execute, but it won't print out the nAges arguments. Note that compilation isn't a sufficient test of correctness.