Copy-Constructor.

public class Apple {
 
               String color;
               String size;
 
               Apple(String color, String size) {
                              this.color = color;
                              this.size = size;
               }
 
               Apple(Apple appleObj) {
                              this.color = appleObj.color;
                              this.size = appleObj.size;
               }
 
               @Override
               public String toString() {
                              return "Apple of (" + color + " , " + size + ")";
               }
 
               public static void main(String[] str) {
                              Apple greenApple = new Apple("Green", "small");
 
                              Apple redApple = new Apple("Red", "large");
 
                              Apple anotherGreenApple = new Apple(greenApple);
 
                              System.out.println(greenApple);
                              System.out.println(redApple);
                              System.out.println(anotherGreenApple);
               }
 
}