我正在创建Brick Breakers，我已经为多行（xCord-etc）创建了数组，yCords用于绘制和跟踪每个矩形的点。正如你所看到的，我做了一个for循环来遍历每个x坐标并检测到球与矩形相交。我的问题是我无法弄清楚如何在与球相交时移除一个矩形。我一直在使用clearRect并尝试将其设置为零以获得宽度和高度，但它所做的只是在碰撞时将其颜色更改为白色。
有什么建议吗？
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.Timer;
import javax.swing.JPanel;
import java.util.*;
public class game extends JPanel implements KeyListener, ActionListener {
private static final Component Rectangle = null;
//private static final String = null;
private Timer timer;
private boolean play = false;
private static int playerx = 650,playerY=930,panW=250,panH=15;
private static int ballx=900, bally=600, ballxdir=-1,ballydir=-2,ballW=30,ballH=30;
int []yCord = {0,80,160,240,320,400,480,40,120,200,280,360,440,530};// Rows of Bricks^
int[] xCord= {1,210,420,630,840,1050,1260}; // Horizontal xPos bricks <-->
int[] secRow ={100,310,520,730,940,1150};
int[] xRow = {200,410,620,830,1040};
int[] fRow = {300,510,720,930};
int[]sixRow= {400,610,820};
int[]sevRow = {500,710};
int[]finRow = {600};
for(int loc=0;loc<7; loc++) { //top Row
g.setColor(Color.lightGray);
g.fillRect(xCord[loc], yCord[0], 200, 30);
g.fillRect(xCord[loc], yCord[7], 200, 30);
g.setColor(Color.yellow);
g.fillRect(xCord[loc],yCord[13], 200, 30); //second row
if (new Rectangle(ballx, bally,ballW,ballH).intersects //detects intersection
(new Rectangle(xCord[loc],yCord[0],200,30))){
System.out.print(xCord[loc]+" Brick Hit\n");
g.clearRect(xCord[loc], yCord[0], 200, 30);
}
else if(new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(xCord[loc],yCord[7],200,30))){
g.clearRect(xCord[loc], yCord[7], 200, 30);
repaint();
}else if(new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(xCord[loc],yCord[13],200,30))){
g.clearRect(xCord[loc], yCord[13], 200, 30);
}
// ballydir = -ballydir;
}
for (int loc=0; loc<6; loc++) {
g.setColor(Color.GREEN);
g.fillRect(secRow[loc], yCord[1], 200, 30);
g.fillRect(secRow[loc], yCord[8], 200, 30);
if (new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(secRow[loc],yCord[1],200,30))) {
System.out.print(secRow[loc]+" Brick Hit\n");
g.clearRect(secRow[loc], yCord[1], 200, 30);
// ballydir = -ballydir;
}
else if(new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(secRow[loc],yCord[8],200,30))){
g.clearRect(secRow[loc], yCord[8], 200, 30);
repaint();
}
}
for (int loc=0; loc<5; loc++) {
g.setColor(Color.MAGENTA);
g.fillRect(xRow[loc],yCord[2], 200, 30);
g.fillRect(xRow[loc], yCord[9], 200, 30);
if (new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(xRow[loc],yCord[2],200,30))) {
System.out.print(xRow[loc]+" Brick Hit\n");
g.clearRect(xRow[loc], yCord[2], 200, 30);
// ballydir = -ballydir;
}
else if(new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(xRow[loc],yCord[9],200,30))){
g.clearRect(xRow[loc], yCord[9], 200, 30);
repaint();
}
}
for (int loc=0; loc<4; loc++) {
g.setColor(Color.BLUE);
g.fillRect(fRow[loc], yCord[3], 200, 30);
g.fillRect(fRow[loc],yCord[10], 200, 30);
if (new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(fRow[loc],yCord[3],200,30))) {
System.out.print(fRow[loc]+" Brick Hit\n");
g.clearRect(fRow[loc], yCord[3], 200, 30);
}
else if(new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(fRow[loc],yCord[10],200,30))){
g.clearRect(fRow[loc], yCord[10], 200, 30);
repaint();
}
}
for (int loc=0; loc<3; loc++) {
g.setColor(Color.PINK);
g.fillRect(sixRow[loc], yCord[4], 200, 30);
g.fillRect(sixRow[loc],yCord[11], 200, 30);
if (new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(sixRow[loc],yCord[4],200,30))) {
System.out.print(sixRow[loc]+" Brick Hit\n");
g.clearRect(sixRow[loc], yCord[4], 200, 30);
// ballydir = -ballydir;
}
else if(new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(sixRow[loc],yCord[11],200,30))){
g.clearRect(sixRow[loc], yCord[11], 200, 30);
repaint();
}
}
for (int loc=0; loc<2; loc++) {
g.setColor(Color.RED);
g.fillRect(sevRow[loc], yCord[5], 200, 30);
g.fillRect(sevRow[loc],yCord[12], 200, 30);
if (new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(sevRow[loc],yCord[5],200,30))) {
System.out.print(sevRow[loc]+" Brick Hit\n");
g.clearRect(sevRow[loc], yCord[5], 200, 30);
// ballydir = -ballydir;
}
else if(new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(sevRow[loc],yCord[12],200,30))){
g.clearRect(sevRow[loc], yCord[12], 200, 30);
repaint();
}
}
for (int loc=0; loc<1; loc++) {
g.setColor(Color.RED);
g.fillRect(finRow[loc], yCord[6], 200, 30);
if (new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(finRow[loc],yCord[6],200,30))) {
System.out.print(finRow[loc]+" Brick Hit\n");
g.clearRect(finRow[loc], yCord[6], 200, 30);
ballydir = -ballydir;
}
}
g.dispose();
//repaint();
}
public void right() { //left and right methods for keyboard inputs
play = true;
playerx += 40;
}
public void left() {
play = true;
playerx -=40;
}
@Override
public void keyPressed(KeyEvent e) { //user Keyboard INPUTS L,R
int key = e.getKeyCode();
if(key ==KeyEvent.VK_LEFT) {
//System.out.print("Left\n");
left();
}if (key == KeyEvent.VK_RIGHT) {
//System.out.print("Right\n");
right();
}
}
@Override
public void actionPerformed(ActionEvent e) { //basic GAMEPLAY BOUNDS collision
// implement code for collision against panel and right wall
// IF ball goes out of bounds (ground level) display GAME OVER
timer.start();
if (play) {
ballx +=ballxdir;
bally -=ballydir;
if (new Rectangle(ballx, bally,ballW,ballH).intersects
(new Rectangle(playerx,playerY,panW,panH))) {
System.out.print("HIT");
ballydir = -ballydir;
}
//ballydir = +ballydir;
//left wall collision
if (ballx <1) {
ballxdir =-ballxdir+1;
System.out.print("SPEED INCREASE: "+ballxdir+" LEFT HIT\n");
}
//RIGHT wall collision
if (ballx>1455) {
ballxdir= -ballxdir+1;
System.out.print("SPEED INCREASE: "+ballxdir+ " RIGHT wall HIT\n");
}
//GROUND collision(collision not needed) Change to display JFRAME of "GAME OVER"
if (bally>925) {
// bally=500;//start position
// ballx=900;
System.exit(0);
}
//celling collision
if (bally <-1) {
ballydir =-ballydir-1;
System.out.print("SPEED INCREASE: "+ballydir+" Celling HIT\n");
}
//PANEL OFF SCREEN PREVENTION BOUNDS
if(playerx>1223) {
playerx=1223;
System.out.print("Out Of Bounds\n");
}if (playerx<1) {
playerx =1;
System.out.print("Out Of Bounds\n");
}
}
repaint();
}