そのため、特定のキーが押されたときにパドルをインクリメントして移動しようとしています。キーリリースを使用しなかった場合、両方を同時に移動できなかったので、このようにしています。
私が今直面している問題は、方向を押すと進むことです（両方が同時に進むことができます）が、反対のキーを押すと停止し、再び移動できなくなります. 任意のヒント？
これが私が話しているすべてのものです
public void paddleMove(){
if(leftDown==true){
y-=10;
}
if(leftUp ==true){
y+=10;
}
if(rightDown ==true){
ytwo-=10;
}
if(rightUp ==true){
ytwo+=10;
}
}
public void keyPressed(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_A || e.getKeyCode() == KeyEvent.VK_S || e.getKeyCode() == KeyEvent.VK_QUOTE || e.getKeyCode() == KeyEvent.VK_SEMICOLON){
if(e.getKeyCode() == KeyEvent.VK_A){
// y-=10;
leftDown = true;
}
if(e.getKeyCode() == KeyEvent.VK_S){
// y+=10;
leftUp = true;
}
if(e.getKeyCode() == KeyEvent.VK_QUOTE){
// ytwo-=10;
rightDown = true;
}
if(e.getKeyCode() == KeyEvent.VK_SEMICOLON){
//ytwo+=10;
rightUp = true;
}
}
}
public void keyRelease(KeyEvent r){
if(r.getKeyCode() == KeyEvent.VK_A){
leftDown = false;
}
if(r.getKeyCode() == KeyEvent.VK_S){
leftUp = false;
}
if(r.getKeyCode() == KeyEvent.VK_QUOTE){
rightDown = false;
}
if(r.getKeyCode() == KeyEvent.VK_SEMICOLON){
rightUp = false;
}
}
ここに完全なコードがあります
import java.awt.Color;
import java.awt.Event;
import java.awt.Graphics;
import java.util.Random;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Pong extends JFrame implements ActionListener{
//implement constants
PongPanel pongPanel = new PongPanel();
//JFrame pong x and y coordinates
static final int jfpX = 150;
static final int jfpY = 20;
// JFrame pong width and height
static final int jfpW = 800;
static final int jfpH = 600;
Thread thrd;
public static void main(String[] args) {
Pong jfp = new Pong();
jfp.setVisible(true);
}
public Pong(){
setBounds(jfpX,jfpY,jfpW,jfpH);
setTitle("Pong");
setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setBackground(Color.black);
add(pongPanel);
addKeyListener(pongPanel);
thrd = new Thread (pongPanel);
thrd.start();
}
public void actionPerformed(ActionEvent e) {
}
}
class PongPanel extends JPanel implements Runnable, KeyListener{
Random random = new Random();
static final int jpW = 800;
static final int jpH = 600;
int paddleStart = (jpH/2)-35;
int paddleStarttwo = (jpH/2)-35;
int ballStartX = (jpW/2)-20;
int ballStartY = (jpH/2)-20;
int ytwo,x,y;
int ballD = 30;
int paddleW1 = 20;
int paddleH1 = 100;
int paddleW2 = 20;
int paddleH2 = 100;
int min = -2;
int max = 2;
int randomBallx, randomBally;
boolean leftUp = false;
boolean leftDown = false;
boolean rightUp = false;
boolean rightDown = false;
// int randomBallx = random.nextInt(max-min+1)+min;
// int randomBally = random.nextInt(max-min+1)+min;
int rand1 = random.nextInt(2-1 + 1)+1; // random for function to determine ballx and bally
int rand2 = random.nextInt(2-1+2)+1;
int dx = 4;
int dy = 4; //direction of y
public void ballNotZero(){// makes sure the ball doesnt go straight up and down
if (randomBallx ==0){
randomBallx = random.nextInt(max-min+1)+min;
}
if(randomBally == 0){
randomBally=random.nextInt(max-min+1)+min;
}
// if(rand1 ==1){
// randomBallx=-1;
// }
// if(rand1 ==2){
// randomBallx=1;
// }
// if(rand2 ==1){
// randomBally =-1;
// }
// if(rand2==2){
// randomBally = 1;
// }
}
public PongPanel(){
}
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
Color ball;
Color paddleOne;
Color paddleTwo;
ball = new Color(255,0,255);
paddleOne = new Color(255,0,0);
paddleTwo = new Color(0,0,255);
g.setColor(ball);
g.fillOval(ballStartX+randomBallx,ballStartY+randomBally,ballD,ballD);
g.setColor(paddleOne);
g.fillRect(20,paddleStart+y,paddleW1,paddleH1);
g.setColor(paddleTwo);
g.fillRect(760,paddleStarttwo+ytwo,paddleW2,paddleH2);
}
public void run() {
while(true){
ballNotZero();
detectPaddle();
paddleMove();
randomBall();
ballMove();
repaint();
try {Thread.sleep(75); } catch(Exception e){
}
}
}
public static boolean intervallContains(int low, int high, int n) { //determines if something is in a certain range
return n >= low && n <= high;
}
public void detectPaddle(){ //determines if ball is close enough to paddle for detection
int withinY = (paddleStart+y) -(ballStartY+randomBally);
int withinY1 = (paddleStarttwo+ytwo)-(ballStartY+randomBally);
if (ballStartX+randomBallx <=20 && intervallContains(-50,50,withinY)){
dx = -dx;
}
if(ballStartX+randomBallx >=760 && intervallContains(-50,50,withinY1)){
dx = -dx;
}
}
public void randomBall(){
if(randomBallx >=0 ){
randomBallx+=dx;
}
if(randomBallx<0){
randomBallx-=dx;
}
if(randomBally>=0){
randomBally+=dy;
}
if(randomBally<0){
randomBally-=dy;
}
// randomBallx+=randomBallx;
// randomBally+=randomBally;
}
public void ballMove(){
if(ballStartY+randomBally > jpH-60){
dy= -dy;
}
if(ballStartY+randomBally <0){
dy = -dy;
}
}
public void paddleMove(){
if(leftDown==true){
y-=10;
}
if(leftUp ==true){
y+=10;
}
if(rightDown ==true){
ytwo-=10;
}
if(rightUp ==true){
ytwo+=10;
}
}
public void keyPressed(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_A || e.getKeyCode() == KeyEvent.VK_S || e.getKeyCode() == KeyEvent.VK_QUOTE || e.getKeyCode() == KeyEvent.VK_SEMICOLON){
if(e.getKeyCode() == KeyEvent.VK_A){
// y-=10;
leftDown = true;
}
if(e.getKeyCode() == KeyEvent.VK_S){
// y+=10;
leftUp = true;
}
if(e.getKeyCode() == KeyEvent.VK_QUOTE){
// ytwo-=10;
rightDown = true;
}
if(e.getKeyCode() == KeyEvent.VK_SEMICOLON){
//ytwo+=10;
rightUp = true;
}
}
}
public void keyRelease(KeyEvent r){
if(r.getKeyCode() == KeyEvent.VK_A){
leftDown = false;
}
if(r.getKeyCode() == KeyEvent.VK_S){
leftUp = false;
}
if(r.getKeyCode() == KeyEvent.VK_QUOTE){
rightDown = false;
}
if(r.getKeyCode() == KeyEvent.VK_SEMICOLON){
rightUp = false;
}
}
public void keyTyped(KeyEvent e) {
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
}