Question
In: Computer Science
This is Java Programing. Add a shape of oval to BOXBALLOVAL. import java.awt.*; import java.awt.event.*; import...
This is Java Programing. Add a shape of oval to BOXBALLOVAL.
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.Timer;
import javax.swing.*;
public class BOXBALLOVAL {
public static void main(String[] args) {
new myframe();// creating main jframe instance
}
}
class myframe extends JFrame
{
Container c;
JPanel panel;
JButton addbutton, removebutton;
JLabel counter, ballsize;
JTextField size_input;
JComboBox cb;
buttonListener handle;
myDrawboard myboard;
JFrame mainFrame;
public myframe()
{
super("Your title");
c = getContentPane();
size_input = new JTextField(5);
counter = new JLabel("Count : ");
ballsize = new JLabel("Size : ");
size_input.setText("50");
addbutton = new JButton("Add");
removebutton = new JButton("Remove");
cb = new JComboBox();
cb.addItem("Ball");
cb.addItem("Box");
handle = new buttonListener();
addbutton.addActionListener(handle);
removebutton.addActionListener(handle);
panel = new JPanel();
panel.add(ballsize);
panel.add(size_input);
panel.add(addbutton);
panel.add(removebutton);
panel.add(counter);
panel.add(cb);
myboard = new myDrawboard();
c.add(myboard.panel, BorderLayout.CENTER);
c.add(panel, BorderLayout.SOUTH);
setSize(800, 600);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
// update screen (refresh)
Timer timer = new Timer();
timer.schedule(new myTimer(), 0, 16);
}
class myTimer extends TimerTask
{
@Override
public void run() {
repaint();
}
}
class buttonListener implements ActionListener {
int i;
public void actionPerformed(ActionEvent action)
{
if (action.getSource() == addbutton) {
if (!size_input.getText().equals("")) {
try
{
myboard.additem(Integer.parseInt(size_input.getText()), cb.getSelectedItem().toString());
counter.setText(" Count : " + myboard.countItem()+ " ");
}
catch (NumberFormatException e)
{
System.out.println(e);
JOptionPane.showMessageDialog(null, "Enter only number!", "Invalid Input", JOptionPane.INFORMATION_MESSAGE);
}
}
else
{
JOptionPane.showMessageDialog(null, "Enter the Object size!", "Input needed", JOptionPane.INFORMATION_MESSAGE);
}
}
if (action.getSource() == removebutton)
{
myboard.removeBall();
counter.setText(" Count : " + myboard.countItem()+ " ");
}
}
}
}
class myDrawboard
{
private static int count = 0;
Graphics2D g2;
MyPanel panel = new MyPanel();
public void additem(int size, String shape)
{
count++;
panel.addShape(size, shape);
}
public String countItem() {
return Integer.toString(count);
}
public void removeBall() {
if (panel.deleteShape()) {
count--;
}
}
}
class MyPanel extends JPanel
{
ArrayList myArrayList = new ArrayList();
public MyPanel()
{
setBackground(Color.BLACK);
}
public void addShape(int size, String shape)
{
Random randomGenerator = new Random();
int x = randomGenerator.nextInt(200);
int y = randomGenerator.nextInt(200);
int R = randomGenerator.nextInt(256);
int G = randomGenerator.nextInt(256);
int B = randomGenerator.nextInt(256);
int vx = randomGenerator.nextInt(10)+2;
int vy = randomGenerator.nextInt(10)+2;
Color randomcolor = new Color(R, G, B);
if (shape == "Box")
{
Box box = new Box();
box.setInfo(size, x, y, randomcolor, vx, vy);
myArrayList.add(box);
}
else // shape==ball
{
Ball ball = new Ball();
ball.setInfo(size, x, y, randomcolor, vx, vy);
myArrayList.add(ball);
}
}
public boolean deleteShape()
{
if (myArrayList.size() > 0)
{
myArrayList.remove(myArrayList.size() - 1); // remove the last one
return true;
}
return false;
}
public void paintComponent(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.BLACK);
g2.fillRect(0,0,getWidth(), getHeight());
for (int i = 0; i < myArrayList.size(); i++)
{
myArrayList.get(i).update(getWidth(), getHeight());
myArrayList.get(i).drawObject(g2);
}
}
}
interface DrawObject
{
void drawObject(Graphics2D g2);
void update(int width, int height);
}
class Ball implements DrawObject
{
private int size;
int x;
int y;
int velX;
int velY;
private Color color;
public void setInfo(int size, int x, int y, Color randomcolor, int vx, int vy)
{
this.size = size;
this.x = x;
this.y = y;
this.velX = vx;
this.velY = vy;
this.color = randomcolor;
}
public void drawObject(Graphics2D g2)
{
g2.setColor(color);
g2.fillOval(x, y, size * 2, size * 2);
g2.setFont(new Font("SansSerif", Font.BOLD, 50));
// g2.drawString("cs211",x,y);
g2.drawString("CS211",100,100);
}
//Ball moving
public void update(int width, int height)
{
x += velX;
if(x < 0 || x > width-size*2)
velX *= -1;
y += velY;
if(y < 0 || y > height-size*2)
velY *= -1;
}
}
class Box implements DrawObject
{
private int size;
int x;
int y;
int velX;
int velY;
private Color color;
private Rectangle square;
public void setInfo(int size, int x, int y, Color randomcolor, int vx, int vy)
{
square = new Rectangle(x, y, size, size);
this.velX = vx;
this.velY = vy;
color = randomcolor;
}
public void drawObject(Graphics2D g2)
{
g2.setColor(color);
g2.fillRect(square.x, square.y, square.width, square.height);
}
//box moving
public void update(int width, int height)
{
square.x += velX;
if(square.x < 0 || square.x > width-square.width)
velX *= -1;
square.y += velY;
if(square.y < 0 || square.y > height-square.height)
velY *= -1;
}
}
Solutions
Expert Solution
A)
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.Timer;
import javax.swing.*;
class ShapeCollision {
private BOXBALL;
private frame limits;
private int w = 800;
private int h = 600;
private Boxball= New Boxball(w, h);
private Boxball= New Boxball[6];
ShapeCollision() {
img = new Boxball(w, h, BufferedImage.TYPE_INT_RGB);
final Jframe = new Jframe(new frameIcon(frame))
for (int i = 0; i < boxball.length; i++) {
Boxballoval[i] = newBoxball (60 + i * 80, 40 + i * 80,i);
}
limits = new frame(new Rectangle(0, 0, w, h));
public class Boxball {
public static void main(String[] args) {
new myframe();// creating main jframe instance
}
}
class myframe extends JFrame
{
Container c;
JPanel panel;
JButton addbutton, removebutton;
JLabel counter, ballsize;
JTextField size_input;
JComboBox cb;
buttonListener handle;
myDrawboard myboard;
JFrame mainFrame;
public myframe()
{
super("Your title");
c = getContentPane();
size_input = new JTextField(5);
counter = new JLabel("Count : ");
ballsize = new JLabel("Size : ");
size_input.setText("50");
addbutton = new JButton("Add");
removebutton = new JButton("Remove");
cb = new JComboBox();
cb.addItem("Ball");
cb.addItem("Box");
handle = new buttonListener();
addbutton.addActionListener(handle);
removebutton.addActionListener(handle);
panel = new JPanel();
panel.add(ballsize);
panel.add(size_input);
panel.add(addbutton);
panel.add(removebutton);
panel.add(counter);
panel.add(cb);
myboard = new myDrawboard();
c.add(myboard.panel, BorderLayout.CENTER);
c.add(panel, BorderLayout.SOUTH);
Timer timer = new Timer();
timer.schedule(new myTimer(), 0, 16);
}
class myTimer extends TimerTask
{
@Override
public void run() {
repaint();
}
}
class buttonListener implements ActionListener {
int i;
public void actionPerformed(ActionEvent action)
{
if (action.getSource() == addbutton) {
if (!size_input.getText().equals("")) {
try
{
myboard.additem(Integer.parseInt(size_input.getText()), cb.getSelectedItem().toString());
counter.setText(" Count : " + myboard.countItem()+ " ");
}
catch (NumberFormatException e)
{
System.out.println(e);
JOptionPane.showMessageDialog(null, "Enter only number!", "Invalid Input", JOptionPane.INFORMATION_MESSAGE);
}
}
else
{
JOptionPane.showMessageDialog(null, "Enter the Object size!", "Input needed", JOptionPane.INFORMATION_MESSAGE);
}
}
if (action.getSource() == removebutton)
{
myboard.removeBall();
counter.setText(" Count : " + myboard.countItem()+ " ");
}
}
}
}
class myDrawboard
{
private static int count = 0;
Graphics2D g2;
MyPanel panel = new MyPanel();
public void additem(int size, String shape)
{
count++;
panel.addShape(size, shape);
}
public String countItem() {
return Integer.toString(count);
}
public void removeBall() {
if (panel.deleteShape()) {
count--;
}
}
}
class MyPanel extends JPanel
{
ArrayList myArrayList = new ArrayList();
public MyPanel()
{
setBackground(Color.BLACK);
}
public void addShape(int size, String shape)
{
Random randomGenerator = new Random();
int x = randomGenerator.nextInt(200);
int y = randomGenerator.nextInt(200);
int R = randomGenerator.nextInt(256);
int G = randomGenerator.nextInt(256);
int B = randomGenerator.nextInt(256);
int vx = randomGenerator.nextInt(10)+2;
int vy = randomGenerator.nextInt(10)+2;
Color randomcolor = new Color(R, G, B);
if (shape == "Box")
{
Box box = new Box();
box.setInfo(size, x, y, randomcolor, vx, vy);
myArrayList.add(box);
}
else // shape==ball
{
Ball ball = new Ball();
ball.setInfo(size, x, y, randomcolor, vx, vy);
myArrayList.add(ball);
}
}
public boolean deleteShape()
{
if (myArrayList.size() > 0)
{
myArrayList.remove(myArrayList.size() - 1); // remove the last one
return true;
}
return false;
}
public void paintComponent(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.BLACK);
g2.fillRect(0,0,getWidth(), getHeight());
for (int i = 0; i < myArrayList.size(); i++)
{
myArrayList.get(i).update(getWidth(), getHeight());
myArrayList.get(i).drawObject(g2);
}
}
}
interface DrawObject
{
void drawObject(Graphics2D g2);
void update(int width, int height);
}
class Ball implements DrawObject
{
private int size;
int x;
int y;
int velX;
int velY;
private Color color;
public void setInfo(int size, int x, int y, Color randomcolor, int vx, int vy)
{
this.size = size;
this.x = x;
this.y = y;
this.velX = vx;
this.velY = vy;
this.color = randomcolor;
}
public void drawObject(Graphics2D g2)
{
g2.setColor(color);
g2.fillOval(x, y, size * 2, size * 2);
g2.setFont(new Font("SansSerif", Font.BOLD, 50));
// g2.drawString("cs211",x,y);
g2.drawString("CS211",100,100);
}
//Ball moving
public void update(int width, int height)
{
x += velX;
if(x < 0 || x > width-size*2)
velX *= -1;
y += velY;
if(y < 0 || y > height-size*2)
velY *= -1;
}
}
class Box implements DrawObject
{
private int size;
int x;
int y;
int velX;
int velY;
private Color color;
private Rectangle square;
public void setInfo(int size, int x, int y, Color randomcolor, int vx, int vy)
{
square = new Rectangle(x, y, size, size);
this.velX = vx;
this.velY = vy;
color = randomcolor;
}
public void drawObject(Graphics2D g2)
{
g2.setColor(color);
g2.fillRect(square.x, square.y, square.width, square.height);
}
//box moving
public void update(int width, int height)
{
square.x += velX;
if(square.x < 0 || square.x > width-square.width)
velX *= -1;
square.y += velY;
if(square.y < 0 || square.y > height-square.height)
velY *= -1;
}
}
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