Answer to Question #299465 in Java | JSP | JSF for lolo

Question

This assignment has 4 sub-sections.

Use the JOptionPane class for all required input/output.

 

a)    Write a superclass called Shape (as shown in the class diagram), which contains:

·        Two instance variables color (String) and filled (boolean).

·        Two constructors: a no-arg (no-argument) constructor that initializes the color to "green" and filled to true, and a constructor that initializes the color and filled to the given values.

·        Getter and setter for all the instance variables. By convention, the getter for a boolean variable xxx is called isXXX() (instead of getXxx() for all the other types).

·        A toString() method that returns "A Shape with color of xxx and filled/Not filled".

Write a test program to test all the methods defined in Shape.

Answer 1

import java.util.*;


import javax.swing.JOptionPane;


class Shape {
	private String color;
	private boolean filled;


	public Shape() {
		this.color = "green";
		this.filled = true;
	}


	public Shape(String color, boolean filled) {
		this.color = color;
		this.filled = filled;
	}


	public String toString() {
		String filledStr = "filled";
		if (!filled) {
			filledStr = "Not filled";
		}
		return "A Shape with color of " + color + " and " + filledStr;
	}


	/**
	 * @return the color
	 */
	public String getColor() {
		return color;
	}


	/**
	 * @param color the color to set
	 */
	public void setColor(String color) {
		this.color = color;
	}


	/**
	 * @return the filled
	 */
	public boolean isFilled() {
		return filled;
	}


	/**
	 * @param filled the filled to set
	 */
	public void setFilled(boolean filled) {
		this.filled = filled;
	}
}


class App {


	public static void main(String[] args) {
		Shape shape = new Shape();
		String color = JOptionPane.showInputDialog("Enter color");
		shape.setColor(color);
		int filledInt = Integer.parseInt(JOptionPane.showInputDialog("Enter 1. Is filled, 2. Is NOT filled: "));
		shape.setFilled(false);
		if (filledInt == 1) {
			shape.setFilled(true);
		}
		JOptionPane.showMessageDialog(null, shape.toString());


		color = JOptionPane.showInputDialog("Enter color");
		filledInt = Integer.parseInt(JOptionPane.showInputDialog("Enter 1. Is filled, 2. Is NOT filled: "));
		boolean isFilled = false;
		if (filledInt == 1) {
			isFilled = true;
		}
		shape = new Shape(color, isFilled);
		String filledStr = "filled";
		if (!shape.isFilled()) {
			filledStr = "Not filled";
		}


		JOptionPane.showMessageDialog(null, "A Shape with color of " + shape.getColor() + " and " + filledStr);


	}
}