What do 3 dots next to a parameter type mean in Java?

Question

What do the 3 dots following String in the following method mean?

public void myMethod(String... strings){
    // method body
}

Answer 1

• It means zero or multiple parameter of same data type.
• It must be the last parameter of the constructor or function.
• We can have only one of this type parameter in respective constructor or function.

Example 1:

public class quest1 {

    public quest1(String... mynum) {
        System.out.println("yee haa");
    }

    public static void main(String[] args) {
        quest1 q=new quest1();

        quest1 q1=new quest1("hello");

    }
}

Example 2:

public class quest1 {

    public quest1(int... at) {
        System.out.println("yee haa");
    }

    public quest1(String... at) {
        System.out.println("yee haa");
    }

    public static void main(String[] args) {
        quest1 q=new quest1("value");

        quest1 q1=new quest1(1);

    }

    public void name(String ... s) {

    }
}

output:

yee haa

yee haa