我遵循了某人在另一个问题上发布的关于通过键绑定来控制对象的示例。为了简单起见，它所控制的只是在按下 VK_UP 时打印“woo”，但它并没有这样做。
这里的一些代码我仍然无法正常工作。
这里主要
import javax.swing.*;
@SuppressWarnings("serial")
public class apples extends JFrame {
static boolean running;
public static void main(String[] args){
JFrame f = new JFrame();
Peach p = new Peach();
f.getContentPane().add(new test());
f.add(new test());
f.add(p);
f.setSize(400,250);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
p.run();
}
}
这是关键绑定的东西
import java.awt.*;
import java.awt.event.*;
import java.util.HashMap;
import java.util.Map;
import javax.swing.*;
@SuppressWarnings("serial")
public class Peach extends JPanel {
public void paint(Graphics g){
setOpaque(false);
super.paintComponent(g);
this.setBackground(Color.WHITE);
g.setColor(Color.BLACK);
g.fillOval(x, y, br, br);
g.drawString("Sort of Pong?", 157, 20);
g.setColor(Color.BLACK);
g.fillRect(paddlex, paddley, psizex, psizey);
//g.setColor(new Color(51, 255, 204));
//g.fillRect(100, 100, 80, 100);
repaint();
}
public void Panel(){ Thread go = new Thread();
go.start(); }
int xpos;
final int left = -1; //left increment
final int right = 1; //right increment
int up = -1; // up increment (negative because down is revered in coordinates)
int down = 1; // down increment
boolean check = true; // moving or not
int x =200; // ball position x
int y=100; // ball position y
boolean rightmove = true; // moving right or left
boolean leftmove = false; // moving left
boolean upmove = true; // moving up
boolean downmove = false; // moving down
int paddlex = 100; // paddle position x
int paddley = 100; // paddle position y
int psizex = 100; // paddle size in x dimension
int psizey = 100; // paddles size in y dimension
int cdy; // for checking other side for collisions
int cdx; // for checking other side for collisions
int br = 8; // ball radius
boolean shipupmove = false;
boolean shipdownmove = true;
int shipspeed = 1;
boolean goup;
long counter = 0;
public void calc(){
cdy = psizey + paddley; // for checking other side for collisions
cdx = psizex + paddlex; // for checking other side for collisions
}
public void run(){
while(true){
move();
collisiond();
calc();
counter++;
try
{
Thread.sleep(8);
}
catch(InterruptedException ex)
{
}
}
}
public void move(){
if (rightmove){
if(x <377){
x = (x+right);
}else{rightmove = false; leftmove = true;}
}
if(leftmove)
if(x > 0){
x = (x-right);
}else{rightmove = true; leftmove= false;}
if (downmove){
if(y <205){
y = (y+down);
}else{downmove = false; upmove = true;}
}
if(upmove)
if(y > 0){
y = (y+up);
}else{downmove = true; upmove= false;}
}
public void collisiond(){
if(leftmove && (x ==(cdx+1) || x == (cdx-1) || x == cdx)&& y >= paddley-br && y <= cdy){
leftmove = false; rightmove = true;
}
if(rightmove && (x ==(paddlex-br+1) || x == (paddlex-br-1) || x == paddlex-br) && y >= paddley && y <= cdy){
rightmove = false; leftmove = true;
}
if(upmove && ((y == cdy+1) || (y == cdy-1) || (y == cdy)) && x >= paddlex && x<= cdx){
upmove = false; downmove = true;
}
if(downmove && ((y == paddley - br +1) || (y == paddley - br -1) || (y == paddley - br)) && x > paddlex && x < cdx){
downmove = false; upmove = true;
}
}
public void movepaddle(){
if(shipupmove && paddley !=0){
this.paddley = paddley - 1 ;
}
if (shipdownmove && paddley < (205-psizey)){
this.paddley = paddley + 1;
}
if(paddley < 16){
shipupmove = false; shipdownmove = true;
}
if(cdy > 189){
shipupmove = true; shipdownmove = false;
}
repaint();
}
}
class test extends JPanel{
private static final long serialVersionUID = 1L;
private Map<Direction, Boolean> directionMap = new HashMap<Direction, Boolean>();
int DELAY = 5;
enum Direction {
UP(KeyEvent.VK_UP,true),
DOWN(KeyEvent.VK_DOWN, false);
private int KeyCode;
boolean moveing;
Direction(int KeyCode, boolean moveing) {
this.KeyCode = KeyCode;
this.moveing = moveing;
}
public int getKeyCode(){
return KeyCode;
}
public boolean moveing(){
return moveing;
}
}
public test(){
for(Direction direction : Direction.values()){
directionMap.put(direction, false);
}
setBindings();
Timer timer = new Timer(5, new TimerListener());
timer.start();
}
private void setBindings(){
InputMap in = getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
ActionMap act = getActionMap();
for(final Direction d : Direction.values()){
KeyStroke press = KeyStroke.getKeyStroke(d.getKeyCode(), 0 ,false);
KeyStroke rel = KeyStroke.getKeyStroke(d.getKeyCode(),0,true);
in.put(press, "key pressed");
in.put(rel, "key released");
act.put(d.toString()+"pressed", new AbstractAction(){
private static final long serialVersionUID = 1L;
public void actionPerformed(ActionEvent e) {
directionMap.put(d, true);
}
});
act.put(d.toString()+"released", new AbstractAction(){
private static final long serialVersionUID = 1L;
public void actionPerformed(ActionEvent e) {
directionMap.put(d, false);
}
});
}
}
public class TimerListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
for(Direction d : Direction.values()){
if(directionMap.get(d)){
if(d.moveing()){
System.out.println("woo");
}
}
}
}
}
}
任何见解将不胜感激谢谢