我的KeyListener没有响应我的JPanel

时间：2014-02-23 19:57:04

标签： java swing jpanel keylistener tetris

我正在写一个俄罗斯方块游戏，我的大多数机制都已完成。我试图输入我的键盘交互来创建一个新的KeyListener，但它似乎不起作用，因为我按下按钮，碎片只是继续下降而不是改变它们的位置。请问有人帮帮我吗？

GUI类：

package tetris;

import java.awt.GridLayout;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.ImageIcon;
import javax.swing.JLabel;

public class Game extends javax.swing.JFrame {
Library obj = new Library();

public Game() {
    initComponents();

    jPanel1.setLayout(new GridLayout(15,20));
    for(int i = 0; i<15; i++){
        for(int j = 0; j<20; j++){
            JLabel label = new JLabel();
            label.setSize(15, 15);
            label.setIcon(new ImageIcon(getClass().getResource("whitetile.png")));
            jPanel1.add(label);
            obj.setTiles(i, j, label);
            label.addKeyListener(new KeyListener());
            this.setFocusable(true);
            this.requestFocusInWindow();
        }
    }
    obj.start();
}

private class KeyListener extends KeyAdapter{

    @Override
    public void keyPressed(KeyEvent evt){
        if(evt.getKeyChar() == KeyEvent.VK_LEFT){
            obj.tiles[obj.r1][obj.col1].setIcon(obj.white);
            obj.tiles[obj.r2][obj.col2].setIcon(obj.white);
            obj.tiles[obj.r3][obj.col3].setIcon(obj.white);
            obj.tiles[obj.r4][obj.col4].setIcon(obj.white);
            obj.col1 -= 1;
            obj.col2 -= 1;
            obj.col3 -= 1;
            obj.col4 -= 1;

            obj.tiles[obj.r1][obj.col1].setIcon(obj.red);
            obj.tiles[obj.r2][obj.col2].setIcon(obj.red);
            obj.tiles[obj.r3][obj.col3].setIcon(obj.red);
            obj.tiles[obj.r4][obj.col4].setIcon(obj.red);
        }

        if(evt.getKeyChar() == KeyEvent.VK_RIGHT){
            obj.tiles[obj.r1][obj.col1].setIcon(obj.white);
            obj.tiles[obj.r2][obj.col2].setIcon(obj.white);
            obj.tiles[obj.r3][obj.col3].setIcon(obj.white);
            obj.tiles[obj.r4][obj.col4].setIcon(obj.white);
            obj.col1 += 1;
            obj.col2 += 1;
            obj.col3 += 1;
            obj.col4 += 1;

            obj.tiles[obj.r1][obj.col1].setIcon(obj.red);
            obj.tiles[obj.r2][obj.col2].setIcon(obj.red);
            obj.tiles[obj.r3][obj.col3].setIcon(obj.red);
            obj.tiles[obj.r4][obj.col4].setIcon(obj.red);
        }

        if(evt.getKeyChar() == KeyEvent.VK_SPACE){
            obj.spin();
        }
    }

    @Override
    public void keyReleased(KeyEvent evt){

    }

    @Override
    public void keyTyped(KeyEvent evt){

    }
}

@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    jPanel1 = new javax.swing.JPanel();
    jLabel1 = new javax.swing.JLabel();
    jLabel2 = new javax.swing.JLabel();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jPanel1.setPreferredSize(new java.awt.Dimension(350, 225));

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 350, Short.MAX_VALUE)
    );
    jPanel1Layout.setVerticalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 338, Short.MAX_VALUE)
    );

    jLabel1.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N
    jLabel1.setText("Nivel: " + String.valueOf(obj.level));

    jLabel2.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N
    jLabel2.setText("Puntuacion: " + String.valueOf(obj.score));

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap(46, Short.MAX_VALUE)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(18, 18, 18)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 102, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 102, javax.swing.GroupLayout.PREFERRED_SIZE)))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap(81, Short.MAX_VALUE)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 338, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap())
        .addGroup(layout.createSequentialGroup()
            .addGap(118, 118, 118)
            .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(40, 40, 40)
            .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );

    pack();
}// </editor-fold>                        

public static void main(String args[]) {

    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
    * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
    */
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(Game.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(Game.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(Game.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(Game.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new Game().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JPanel jPanel1;
// End of variables declaration                   
}

图书馆班：

package tetris;

import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JOptionPane;

public class Library extends Thread{
JLabel tiles[][] = new JLabel[15][20];
ImageIcon red = new ImageIcon(getClass().getResource("redtile.png"));
ImageIcon white = new ImageIcon(getClass().getResource("whitetile.png"));
char figset = ' ';
int score = 0;
int level = 1;
int col1 = -1, col2 = -1, col3 = -1, col4 = -1, r1 = -1, r2 = -1, r3 = -1, r4 = -1;
int fallrate = 1500;

public void play(){
    Timer tm = new Timer();
    tm.start();
    boolean isPlaying = true;

    while(isPlaying){
        boolean isFalling = true;
        int tspinned = 0;
        setFigure();

        while(isFalling){
            try {
                Thread.sleep(fallrate);

                tiles[r1][col1].setIcon(white);
                tiles[r2][col2].setIcon(white);
                tiles[r3][col3].setIcon(white);
                tiles[r4][col4].setIcon(white);
                r1 += 1;
                r2 += 1;
                r3 += 1;
                r4 += 1;

                tiles[r1][col1].setIcon(red);
                tiles[r2][col2].setIcon(red);
                tiles[r3][col3].setIcon(red);
                tiles[r4][col4].setIcon(red);

                if((r1 == tiles.length-1 || r2 == tiles.length-1 || r3 == tiles.length-1 || r4 == tiles.length-1) ||
                        (tiles[r1+1][col1].getIcon() == red&&r1+1 != r2 && r1+1 != r3 && r1+1 != r4) || (tiles[r2+1][col2].getIcon() == red&&r2+1 != r1 && r2+1 != r3 && r2+1 != r4) ||
                        (tiles[r3+1][col3].getIcon() == red&&r3+1 != r2 && r3+1 != r1 && r3+1 != r4) || (tiles[r4+1][col4].getIcon() == red&&r4+1 != r2 && r4+1 != r3 && r4+1 != r1)){
                    isFalling = false;
                    checkwin(r1,r2,r3,r4);
                    if(r1+1 == 2 || r2+1 == 2 || r3+1 == 2 || r4+1 == 2){
                        isPlaying = false;
                    }
                }
            } catch (InterruptedException ex) {
                Logger.getLogger(Library.class.getName()).log(Level.SEVERE, null, ex);
            }

        }
    }
    JOptionPane.showMessageDialog(null,"Ha perdido.\nPuntuación final: " + score);
    System.exit(0);
}

public void spin(){

}

public void setTiles(int row, int col, JLabel label){
    tiles[row][col] = label;
}

public void setFigure(){
    int choice = (int)(Math.random()*7)+1;      

    switch(choice){
        case 1: //I block
            for(int i = 0; i<4; i++){
                tiles[i][9].setIcon(red);
            }
            col1 = 9;
            col2 = 9;
            col3 = 9;
            col4 = 9;
            r1 = 0;
            r2 = 1;
            r3 = 2;
            r4 = 3;
            figset = 'I';
            break;
        case 2: //J block
            for(int i = 0; i<3; i++){
                tiles[i][9].setIcon(red);
            }
            tiles[2][8].setIcon(red);
            col1 = 9;
            col2 = 9;
            col3 = 9;
            col4 = 8;
            r1 = 0;
            r2 = 1;
            r3 = 2;
            r4 = 2;
            figset = 'J';
            break;
        case 3: //L block
            for(int i = 0; i<3; i++){
                tiles[i][9].setIcon(red);
            }
            tiles[2][10].setIcon(red);
            col1 = 9;
            col2 = 9;
            col3 = 9;
            col4 = 10;
            r1 = 0;
            r2 = 1;
            r3 = 2;
            r4 = 2;
            figset = 'L';
            break;
        case 4: //O block
            for(int i = 0; i<2; i++){
                for(int j = 8; j<10; j++){
                    tiles[i][j].setIcon(red);
                }
            }
            col1 = 9;
            col2 = 9;
            col3 = 10;
            col4 = 10;
            r1 = 0;
            r2 = 1;
            r3 = 0;
            r4 = 1;
            figset = 'O';
            break;
        case 5: //S block
            for(int i = 0; i<2; i++){
                tiles[i][9].setIcon(red);
            }
            tiles[0][10].setIcon(red);
            tiles[1][8].setIcon(red);
            col1 = 9;
            col2 = 9;
            col3 = 10;
            col4 = 8;
            r1 = 0;
            r2 = 1;
            r3 = 0;
            r4 = 1;
            figset = 'S';
            break;
        case 6: //Z block
            for(int i = 0; i<2; i++){
                tiles[i][9].setIcon(red);
            }
            tiles[0][8].setIcon(red);
            tiles[1][10].setIcon(red);
            col1 = 9;
            col2 = 9;
            col3 = 10;
            col4 = 8;
            r1 = 0;
            r2 = 1;
            r3 = 1;
            r4 = 0;
            figset = 'Z';
            break;
        case 7: //T block
            for(int i = 8; i<11; i++){
                tiles[0][i].setIcon(red);
            }
            tiles[1][9].setIcon(red);
            col1 = 8;
            col2 = 9;
            col3 = 10;
            col4 = 9;
            r1 = 0;
            r2 = 0;
            r3 = 0;
            r4 = 1;
            figset = 'T';
            break;
    }
}

public void checkwin(int one, int two, int three, int four){
    int c = 0;
    for(int i = 0; i<tiles[0].length; i++){
        if(tiles[one][i].getIcon() == red){
            c++;
        }
    }
    if(c == tiles[0].length){
        for(int i = 0; i<tiles[0].length; i++){
            tiles[one][i].setIcon(white);
        }
        score += 1000;

    }

    c = 0;
    for(int i = 0; i<tiles[0].length; i++){
        if(tiles[two][i].getIcon() == red){
            c++;
        }
    }
    if(c == tiles[0].length){
        for(int i = 0; i<tiles[0].length; i++){
            tiles[two][i].setIcon(white);
        }
        score += 1000;
    }


    c = 0;
    for(int i = 0; i<tiles[0].length; i++){
        if(tiles[three][i].getIcon() == red){
            c++;
        }
    }
    if(c == tiles[0].length){
        for(int i = 0; i<tiles[0].length; i++){
            tiles[three][i].setIcon(white);
        }
        score += 1000;
    }

    c = 0;
    for(int i = 0; i<tiles[0].length; i++){
        if(tiles[four][i].getIcon() == red){
            c++;
        }
    }
    if(c == tiles[0].length){
        for(int i = 0; i<tiles[0].length; i++){
            tiles[four][i].setIcon(white);
        }
        score += 1000;
    }
}

public void run(){
    play();
}
}

1 个答案:

答案 0 :(得分：2)

KeyListener只会在他们注册的组件具有键盘焦点并且可以集中精力时响应关键事件。

JLabel默认情况下无法调焦。

现在，您可以“尝试”完成这项工作，或者您可以使用旨在解决这些问题的Key Bindings API

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