Java programming part 101 Graphics : Java Animation 4 KeyListener

Описание: Java Programming tutorial, GUI, Graphical User Interface. this tutorial is teaching. How to use Java KeyListener for animation,Showing you how to use Key Board keys to control the game.

//below BKGround.java class code

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.ImageIcon;
import javax.swing.JPanel;


public class BKGround extends JPanel implements KeyListener{

Image image;
Image image2;
int x1,y1,x2,y2;
int num;
boolean right;
boolean down;

public BKGround(){

x1 = 100;
y1 = 100;
x2 = 200;
y2 = 200;
num = 0;
right = true;
down = true;
}

public void paint(Graphics g){
num = num + 1;
ImageIcon I = new ImageIcon("image/Abstract-background-1.png");
image = I.getImage();
ImageIcon I2 = new ImageIcon("image/charcustomsheet.gif");
image2 = I2.getImage();
/* if(right == true){
x1 = x1 + 1;
x2 = x2 + 1;
if(x2 == 450){
right = false;
}
}
if(right == false){
x1 = x1 - 1;
x2 = x2 - 1;
if(x1 == 0){
right = true;
}
}

if(down == true){
y1 = y1 + 1;
y2 = y2 + 1;
if(y2 == 350){
down = false;
}
}
if(down == false){
y1 = y1 - 1;
y2 = y2 - 1;
if(y1 == 0){
down = true;
}
}
*/

g.drawImage(image, 0, 0, null);
g.drawImage(image2, x1, y1, x2, y2, 40, 60, 80, 120, null);
repaint();
}

@Override
public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
if(e.getKeyCode()==KeyEvent.VK_UP){
y1 = y1 - 1;
y2 = y2 - 1;
}
if(e.getKeyCode()==KeyEvent.VK_DOWN){
y1 = y1 + 1;
y2 = y2 + 1;
}
if(e.getKeyCode()==KeyEvent.VK_RIGHT){
x1 = x1 + 1;
x2 = x2 + 1;
}
if(e.getKeyCode()==KeyEvent.VK_LEFT){
x1 = x1 - 1;
x2 = x2 - 1;
}
}

@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub

}

@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub

}
}

//GraphicsTut.java class below


import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;

import javax.swing.*;


public class GraphicsTut extends JFrame{
Image image;
Image image2;
int x1,y1,x2,y2;
BKGround bkg = new BKGround();


public GraphicsTut(){
this.setTitle("Remember g for Graphics");
this.setSize(450,350);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
this.add(bkg);
this.addKeyListener(bkg);

}

public static void main(String[] args){
new GraphicsTut();

}

}