我制作了一个俄罗斯方块游戏。现在我已经使用 JPanel 来显示内容和块(使用 PaintComponents() 方法)。
问题是每当我尝试从另一个 JFrame 调用俄罗斯方块程序时,它根本不绘制。
我的俄罗斯方块主菜单的代码是:
import javax.swing.*;
import sun.audio.AudioPlayer;
import sun.audio.AudioStream;
import java.awt.*;
import java.awt.event.*;
import java.io.FileInputStream;
import java.io.InputStream;
@SuppressWarnings("serial")
public class Tetris_MainMenu extends JFrame implements ActionListener {
@SuppressWarnings("unused")
public static void main(String[] args) {
Tetris_MainMenu tmm = new Tetris_MainMenu();
playAudio("doak.wav");
}
JPanel logo = new JPanel();
JPanel buttonPanel = new JPanel(new GridLayout(4, 1));
JButton start = new JButton("START NEW GAME");
JButton help = new JButton("INSTRUCTIONS");
JButton about = new JButton("ABOUT THIS GAME");
JButton exit = new JButton("EXIT");
Tetris_MainMenu(){
setTitle("JAG's TETRIS");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocation(300, 100);
setSize(200, 400);
setEnabled(true);
setFocusable(true);
setVisible(true);
//adding a logo to the logo panel
//adding buttons to the buttonPanel
buttonPanel.add(start);
buttonPanel.add(help);
buttonPanel.add(about);
buttonPanel.add(exit);
//add panels to window
setLayout(new GridLayout(2, 1));
add(logo);
add(buttonPanel);
//make buttons listen to actions
start.addActionListener(this);
help.addActionListener(this);
about.addActionListener(this);
exit.addActionListener(this);
}
@SuppressWarnings("restriction")
public static void playAudio(String filename)
{
InputStream in = null;
AudioStream as = null;
try{
in = new FileInputStream(filename);
as = new AudioStream(in);
}
catch(Exception e){
System.out.println("Error!!!");
}
AudioPlayer.player.start(as);
}
@Override
public void actionPerformed(ActionEvent e) {
if(e.getSource() == start){
this.dispose();
MatrixBoard b = new MatrixBoard();
b.setRequestFocusEnabled(true);
}
else if(e.getSource() == help){
JOptionPane.showMessageDialog(null, "Controls:\n"
+ "LEFT and RIGHT ARROWS: For moving blocks left and right\n"
+ "DOWN ARROW: For dropping block immediately\n"
+ "SPACEBAR: For rotating block\n"
+ "e: To exit to main menu");
}
else if(e.getSource() == about){
JOptionPane.showMessageDialog(null, "Designed by: JAG."
+ "\nIf you want you can use it for your own purposes."
+ "\nBut give credit where it is due.");
}
else if(e.getSource() == exit){
int opt = JOptionPane.showConfirmDialog(null, "Are you sure?", "Confirm Exit", JOptionPane.YES_NO_OPTION);
if(opt == JOptionPane.YES_OPTION){
System.exit(0);
}
}
}
}
当调用 Matrix Board 的构造函数时,俄罗斯方块游戏将在新窗口中启动。但是,这些块在屏幕上不可见。矩阵板的代码是:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import sun.audio.*;
@SuppressWarnings("serial")
public class MatrixBoard extends JPanel implements ActionListener{
int boardHeight = 20;
int boardWidth = 10;
int score = 0;
int curX = 0, curY = 0;
int squareWidth;
int squareHeight;
Timer timer;
int sleepTime = 300;
Shape curPiece;
Shape.Tetromino[][] board;
boolean isFallingFinished = false;
boolean isStarted = false;
boolean isPaused = false;
JFrame f;
@SuppressWarnings("unused")
public static void main(String [] args){
MatrixBoard b = new MatrixBoard();
}
public void update(Graphics g) {
Graphics offgc;
Image offscreen = null;
Dimension d = getSize();
// create the offscreen buffer and associated Graphics
offscreen = createImage(d.width, d.height);
offgc = offscreen.getGraphics();
// clear the exposed area
offgc.setColor(getBackground());
offgc.fillRect(0, 0, d.width, d.height);
offgc.setColor(getForeground());
// do normal redraw
paint(offgc);
// transfer offscreen to window
g.drawImage(offscreen, 0, 0, this);
}
@SuppressWarnings("restriction")
public static void playAudio(String filename)
{
InputStream in = null;
AudioStream as = null;
try{
in = new FileInputStream(filename);
as = new AudioStream(in);
}
catch(Exception e){
System.out.println("Error!!!");
}
AudioPlayer.player.start(as);
}
MatrixBoard(){
f = new JFrame("JAG's TETRIS");
f.setVisible(true);
f.setSize(205, 400);
f.setFocusable(true);
f.setBackground(Color.GREEN);
f.add(this);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(200, 400);
setVisible(true);
setFocusable(true);
requestFocusInWindow();
setBackground(Color.BLACK);
timer = new Timer(400, this);
timer.setInitialDelay(10);
squareWidth = (getWidth())/ boardWidth;
squareHeight = (getHeight()) / boardHeight;
curPiece = new Shape();
board = new Shape.Tetromino[boardWidth][boardHeight];
addKeyListener(new KeyHandler());
clearBoard();
timer.start();
JOptionPane.showMessageDialog(null, "Press Enter to Start!!!");
f.setEnabled(true);
f.setResizable(false);
//setEnabled(true);
start();
System.out.println("MatrixBoard() Success!");
}
public void clearBoard(){
for(int i = 0; i < boardWidth; ++i)
for(int j = 0; j < boardHeight; ++j)
board[i][j] = Shape.Tetromino.NoShape;
}
public void start()
{
if (isPaused)
return;
clearBoard();
timer.start();
timer = new Timer(400, this);
timer.setInitialDelay(100);
isStarted = true;
isFallingFinished = false;
score = 0;
repaint();
newPiece();
System.out.println("START SUCCESS!");
}
private void newPiece(){
if(!isStarted) return;
curPiece.generateShape();
curX = boardWidth / 2;
curY = 1;
if(!tryMove(curPiece, curX, curY)){
curPiece.selectPiece(Shape.Tetromino.NoShape);
isStarted = false;
JOptionPane.showMessageDialog(null, "Game Over! Score : " + score);
isStarted = false;
int opt = JOptionPane.showConfirmDialog(null, "Try Again?", "Again?", JOptionPane.YES_NO_OPTION);
if(opt == JOptionPane.YES_OPTION){
start();
}
else if (opt == JOptionPane.NO_OPTION){
System.exit(0);
}
//dispose();
System.exit(0);
//new Tetris();
return;
}
dropDown();
System.out.println("NEW PIECE SUCCESS!");
}
private boolean tryMove(Shape newPiece, int newX, int newY){
for(int i = 0; i < 4; i++){
int x = newX + newPiece.coords[i][0];
int y = newY + newPiece.coords[i][1];
if(x < 0 || x >= boardWidth || y < 0 || y >= boardHeight){
System.out.println("FALSE1");
return false;
}
if(board[x][y] != Shape.Tetromino.NoShape){
System.out.println("FALSE2");
return false;
}
}
curPiece = newPiece;
curX = newX;
curY = newY;
System.out.println("curX = " + curX + " curY = " + curY);
System.out.println("TRY MOVE SUCCESS!");
return true;
}
private void dropDown(){
int newY = curY;
sleepTime = 300;
System.out.println("newY = " + newY);
while(newY < boardHeight){
if(!tryMove(curPiece, curX, newY+1)){ break;}
++newY;
System.out.println("calling f.update()");
repaint();
System.out.println("called f.update()");
try {
Thread.sleep(sleepTime);
} catch (Exception e) {
e.printStackTrace();
}
}
pieceDropped();
System.out.println("DROPDOWN SUCCESS!");
}
private void pieceDropped(){
for(int i = 0; i < 4; i++){
int x = curX + curPiece.coords[i][0];
int y = curY + curPiece.coords[i][1];
board[x][y] = curPiece.retShape();
System.out.println("PIECE: at X = " + x + " Y = " + y + "is " + curPiece.retShape().ordinal());
}
removeFullLines();
if(!isFallingFinished) newPiece();
System.out.println("PIECE DROPPED SUCCESS!");
}
public void paintComponent(Graphics g){
System.out.println("PAINTED\n\n\n\n\nPAINTED!!!!");
super.paintComponent(g);
Dimension size = getSize();
int boardTop = (int) size.getHeight() - boardHeight * squareHeight;
System.out.println("PAINTED\n\n\n\n\nPAINTED!!!!");
for (int i = 0; i < boardWidth; ++i) {
for (int j = 0; j < boardHeight; ++j) {
Shape.Tetromino shape = board[i][j];
if (shape != Shape.Tetromino.NoShape)
drawSquare(g, i * squareWidth,
boardTop + j * squareHeight, shape);
}
}
if (curPiece.retShape() != Shape.Tetromino.NoShape) {
for (int i = 0; i < 4; ++i) {
int x = curX + curPiece.coords[i][0];
int y = curY + curPiece.coords[i][1];
drawSquare(g, x * squareWidth,
boardTop + (y - 1) * squareHeight,
curPiece.retShape());
}
}
}
private void drawSquare(Graphics g, int x, int y, Shape.Tetromino shape)
{
Color colors[] = { new Color(0, 0, 0), new Color(204, 102, 102),
new Color(102, 204, 102), new Color(102, 102, 204),
new Color(204, 204, 102), new Color(204, 102, 204),
new Color(102, 204, 204), new Color(218, 170, 0)
};
Color color = colors[shape.ordinal()];
g.setColor(color);
g.fillRect(x + 1, y + 1, squareWidth - 2, squareHeight - 2);
g.setColor(color.brighter());
g.drawLine(x, y + squareHeight - 1, x, y);
g.drawLine(x, y, x + squareWidth - 1, y);
g.setColor(color.darker());
g.drawLine(x + 1, y + squareHeight - 1,
x + squareWidth - 1, y + squareHeight - 1);
g.drawLine(x + squareWidth - 1, y + squareHeight - 1,
x + squareWidth - 1, y + 1);
}
private void removeFullLines(){
int numLines = 0;
for(int i = 0; i < boardHeight; i++){
boolean isLineFull = true;
for(int j = 0; j < boardWidth; j++){
System.out.println("i = " + i + " j = " + j);
if(board[j][i] == Shape.Tetromino.NoShape){
System.out.println("Found No Shape here!");
isLineFull = false;
break;
}
}
System.out.println("IIIIIIIIS LINE : " + isLineFull);
if(isLineFull){
numLines++;
for(int k = i; k > 0; k--){
for(int j = 0; j < boardWidth; ++j){
board[j][k] = board[j][k-1];
}
}
}
}
if(numLines > 0){
score += numLines * numLines;
repaint();
newPiece();
}
}
class KeyHandler extends KeyAdapter{
public void keyPressed(KeyEvent e){
if(!isStarted || curPiece.retShape() == Shape.Tetromino.NoShape){
return;
}
int keyCode = e.getKeyCode();
switch(keyCode){
case KeyEvent.VK_LEFT:
tryMove(curPiece, curX - 1, curY);
break;
case KeyEvent.VK_RIGHT:
tryMove(curPiece, curX + 1, curY);
break;
case KeyEvent.VK_DOWN:
sleepTime = 10;
break;
case KeyEvent.VK_E:
int opt = JOptionPane.showConfirmDialog(null,"Are you sure?", "Exit", JOptionPane.YES_NO_OPTION);
if(opt == JOptionPane.YES_OPTION){
System.exit(0);
}
break;
case KeyEvent.VK_SPACE:
tryMove(curPiece.rotateLeft(), curX, curY);
break;
default:
break;
}
}
}
@Override
public void actionPerformed(ActionEvent e) {
if (isFallingFinished) {
isFallingFinished = false;
newPiece();
}
}
}
请帮忙。我怀疑问题出在重绘机制上,但我不确定。