what's wrong in my code

Question about the task

Calling a constructor from a constructor

Java Syntax, Level 5, Lesson 9

Under discussion

help

Figure out what the program does.
Correct the constructor with two parameters so that it calls another constructor with a radius of 10.
Think about which constructor you need to call.

Hint:
carefully study the implementation of the default constructor.

Requirements:

The class must have 3 constructors.
The constructor with two parameters must initialize the variables x and y to the passed values.
The constructor with two parameters must initialize the variable radius to a value of 10.
The constructor with two parameters must call another constructor, passing the correct arguments.
Don't change the main method.
Don't change the default constructor.

package com.codegym.task.task05.task0521; /* Calling a constructor from a constructor */ public class Circle { public double x; public double y; public double radius; public Circle(double x, double y, double radius) { this.x = x; this.y = y; this.radius = radius; } public Circle(double x, double y) { //write your code here this.x=x; this.y=y; this.radius=10; } public Circle() { this(5, 5, 1); } public static void main(String[] args) { Circle circle = new Circle(); System.out.println(circle.x + " " + circle.y + " " + circle.radius); Circle anotherCircle = new Circle(10, 5); System.out.println(anotherCircle.x + " " + anotherCircle.y + " " + anotherCircle.radius); } }

Comments (7)

Popular
New
Old

You must be signed in to leave a comment

parthasarathy t s

Level 6 , Mumbai, India

24 June 2019, 14:06

you need delete the line 23,24,25.... then only the constructor with 2parameter can call another constructor....

parthasarathy t s

Level 6 , Mumbai, India

24 June 2019, 14:04

public class Circle { public double x; public double y; public double radius; public Circle(double x, double y, double radius) { this.x = x; this.y = y; this.radius = radius; } public Circle(double x, double y) { //write your code here this(x,y,10); // this.x=x; // this.y=y; // this.radius=10; } public Circle() { this(5, 5, 1); this.radius=radius; } public static void main(String[] args) { Circle circle = new Circle(); System.out.println(circle.x + " " + circle.y + " " + circle.radius); Circle anotherCircle = new Circle(10, 5); System.out.println(anotherCircle.x + " " + anotherCircle.y + " " + anotherCircle.radius); } }

parthasarathy t s

Level 6 , Mumbai, India

24 June 2019, 14:04

i solve your problem i add the code with it...

Nayan

Level 5 , Chennai, India

23 June 2019, 11:43

public Circle(double x, double y) { this(x, y, 10); }

Collin M

Level 22 , Germiston, South Africa

20 November 2018, 08:53

line 25 is not required, remove this line and add this(...); and use the value 10 for radius in this line. Study this default constructor to understand how to go with it: it's just a hint public Circle() { /* the following line of code makes the default constructor call another constructor with three parameters * passing the correct parameters. The constructor called here is the following: * public Circle(double x, double y, double radius) */ this(5, 5, 1); // here we call: public Circle(double x = 5, double y = 5, double radius = 1) Use it as a hint to solve your problem, but don't hesitate to ask for more help if you still don't understand this problem

logesh ponnusamy

Level 7 , Mumbai, India

10 August 2019, 18:03

why we are putting this in this(5,5,1);

Michael Martin

Level 19 , Arlington, United States

18 November 2018, 14:03

You have to call another constructor in your constructor with two parameters. You are not doing that in your program.