Circle

Circle.java

public class Circle {
    private double radius;
    private String color;
    
    public Circle(){
        radius = 1.0;
        color = "merah";
    }
    
    public Circle(double r){
        radius = r;
        color = "merah";
    }
    
    public Circle(double r, String c){
        radius = r;
        color = c;
    }
    
    void printing(){
        System.out.println("radius = " + radius);
        System.out.println("color = " + color);
    }
}

Tester.java

public class Tester {
    public static void main(String[] args){
        Circle polos = new Circle();
        Circle radius = new Circle(0.5);
        Circle lengkap = new Circle(1.5, "biru");
        
        polos.printing();
        radius.printing();
        lengkap.printing();
    }
}