JAVA Programming :: Basic Concepts - Discussion

public class SwitchTest {
public static void main(String argv[]) {
SwitchTest ms=new SwitchTest();
ms.display();
}
public void display() {
        int k=10;
        switch(k){
            
            default:
            System.out.println("This is the default output");
            break;
            case 10:
            System.out.println("ten");
            break;
            case 20:
            System.out.println("twenty");
            break;
        }
    }
}