JavaExercises/Java 1/SwingHungryCats.java at master · biblelamp/JavaExercises · GitHub

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/**

* Java. Level 1. Lesson 7. Additional homework

* @author Sergey Iryupin

* @version 0.2 dated Jul 19, 2019

* @see HW7Lesson.java using classes Cat and Plate

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import java.util.Random;

class SwingHungryCats extends JFrame {

final String TITLE_OF_PROGRAM = "Hungry Cats";

final String BTN_ADD_FOOD = "Add food";

final String BTN_FEED_CATS = "Feed cats";

final String BTN_RESET = "Reset";

final int WINDOW_WIDTH = 300;

final int WINDOW_HEIGHT = 400;

final int PLATE_VOLUME = 50;

final int PLATE_INIT = 25;

final int PLATE_ADD = 5;

final int NUMBER_OF_CATS = 10;

final int MAX_APPETITE = 20;

Panel panel;

SwingPlate plate; // plate with food

SwingCat[] cats; // array of cats

public static void main(String args[]) {

new SwingHungryCats();

}

SwingHungryCats() {

setTitle(TITLE_OF_PROGRAM);

setDefaultCloseOperation(EXIT_ON_CLOSE);

setSize(WINDOW_WIDTH, WINDOW_HEIGHT);

setLocationRelativeTo(null); // to the center

setResizable(false);

panel = new Panel();

panel.setBackground(Color.white);

Random random = new Random();

plate = new SwingPlate(PLATE_VOLUME, PLATE_INIT);

cats = new SwingCat[NUMBER_OF_CATS];

for (int i = 0; i < cats.length; i++)

cats[i] = new SwingCat("", random.nextInt(MAX_APPETITE) + 1);

JButton btnAdd = new JButton(BTN_ADD_FOOD);

btnAdd.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

plate.add(PLATE_ADD);

panel.repaint();

}

});

JButton btnFeed = new JButton(BTN_FEED_CATS);

btnFeed.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

for (SwingCat cat : cats) {

cat.eat(plate);

}

panel.repaint();

}

});

JButton btnReset = new JButton(BTN_RESET);

btnReset.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

for (SwingCat cat : cats) {

cat.setFullness(false);

}

panel.repaint();

}

});

JPanel btnPanel = new JPanel();

btnPanel.setLayout(new GridLayout()); // for button panel

btnPanel.add(btnAdd);

btnPanel.add(btnFeed);

btnPanel.add(btnReset);

setLayout(new BorderLayout()); // for main window

add(btnPanel, BorderLayout.NORTH);

add(panel, BorderLayout.CENTER);

setVisible(true);

}

class Panel extends JPanel { // for painting

@Override

public void paint(Graphics g) {

super.paint(g);

Dimension size = this.getSize();

plate.paint(g, (int)size.getWidth(), 20);

for (int i = 0; i < cats.length; i++) {

cats[i].paint(g, (i + 1) * 30 + 10,

(int)(size.getWidth()) / PLATE_VOLUME, 20);

}

class SwingCat extends Cat {

SwingCat(String name, int appetite) {

super(name, appetite);

}

void paint(Graphics g, int y, int dx, int dy) {

if (fullness) {

g.setColor(Color.green);

g.fill3DRect(20, y, appetite * dx + 1, dy + 1, true);

}

g.setColor(Color.black);

g.drawRect(20, y, appetite * dx, dy);

}

class SwingPlate extends Plate {

SwingPlate(int volume, int food) {

super(volume, food);

}

void paint(Graphics g, int windowWidth, int dy) {

g.setColor(Color.red);

g.fill3DRect(10, 10, food * (windowWidth - 20) / volume + 1, dy + 1, false);

g.setColor(Color.black);

g.drawRect(10, 10, windowWidth - 20, dy);

}

JavaExercises/Java 1/SwingHungryCats.java at master · biblelamp/JavaExercises · GitHub

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