import java.awt.*;
import java.awt.event.*;class An extends KeyAdapter
{
public void keyPressed(KeyEvent e) { int k=e.getKeyCode();
if(k==KeyEvent.VK_DOWN){
y+=2;
}else if(k==KeyEvent.VK_UP){
y-=2;
}else if(k==KeyEvent.VK_LEFT){
x-=2;
}else if(k==KeyEvent.VK_RIGHT){
x+=2;
}
repaint();
}
}
class YuanYuan extends Panel
{ int x=10,y=10;
public void paint(Graphics g){
super.paint(g);
g.fillOval(x, y, 30, 30);
}
}public class Zong extends Frame
{
public Zong(){
this.setSize(680, 450);
this.setVisible(true);
this.add(new YuanYuan());
}
public static void main(String[] args){
Zong z=new Zong();
}
}请大家帮忙弄一下这段代码 让圆上下左右移动 (本人菜鸟,能有详解过程就更好了) 麻烦大家了!
import java.awt.event.*;class An extends KeyAdapter
{
public void keyPressed(KeyEvent e) { int k=e.getKeyCode();
if(k==KeyEvent.VK_DOWN){
y+=2;
}else if(k==KeyEvent.VK_UP){
y-=2;
}else if(k==KeyEvent.VK_LEFT){
x-=2;
}else if(k==KeyEvent.VK_RIGHT){
x+=2;
}
repaint();
}
}
class YuanYuan extends Panel
{ int x=10,y=10;
public void paint(Graphics g){
super.paint(g);
g.fillOval(x, y, 30, 30);
}
}public class Zong extends Frame
{
public Zong(){
this.setSize(680, 450);
this.setVisible(true);
this.add(new YuanYuan());
}
public static void main(String[] args){
Zong z=new Zong();
}
}请大家帮忙弄一下这段代码 让圆上下左右移动 (本人菜鸟,能有详解过程就更好了) 麻烦大家了!
import java.awt.Graphics;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;import javax.swing.JFrame;
import javax.swing.JPanel;public class YuanYuan extends JPanel {
private static int WIDTH=680;
private static int HEIGHT=450;
private int x=10, y=10;
public static void main(String[] args){
JFrame frame = new JFrame("Yuan");
YuanYuan panel = new YuanYuan();
frame.setSize(WIDTH, HEIGHT);
frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
frame.add(panel);
frame.setVisible(true);
frame.setLocationRelativeTo(null);
panel.action();
}
public void action(){
KeyAdapter l = new KeyAdapter(){
public void keyPressed(KeyEvent e) {
int k = e.getKeyCode();
if (k == KeyEvent.VK_DOWN) {
y += 2; } else if (k == KeyEvent.VK_UP) {
y -= 2;
} else if (k == KeyEvent.VK_LEFT) {
x -= 2;
} else if (k == KeyEvent.VK_RIGHT) {
x += 2;
}
repaint();
}
};
requestFocus();
addKeyListener(l);
} public void paint(Graphics g) {
g.setColor(new Color(0xffffff));
g.fillRect(0, 0, WIDTH, HEIGHT);
g.setColor(new Color(0x0));
g.fillOval(x, y, 30, 30); }
}