Question

我正在将自己作为一个学习项目的java中的俄罗斯方块克隆。但是我现在停留在获取左右移动片段的输入部分。我不确定问题是在我的方法中，还是在keyPressed方法中没有被调用我没有成功调试，因为它忽略了方法。这是我的代码：

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.util.Arrays;

import javax.swing.*;

public class MainClass implements KeyListener{
    public static Painter painter = new Painter();
    public static LShape tetr = new LShape(150,0);

    public static void main(String[] args) throws InterruptedException {
        JFrame window = new JFrame("Tetris");
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setSize(300, 560);
        window.setBackground(Color.BLUE);

        window.getContentPane().add(painter);
        window.setVisible(true);

        ArrayList<Block> blocks = new ArrayList<Block>();
        ArrayList<Block> staticBlocks = new ArrayList<Block>();

        while(true){
            tetr = new LShape(150, 0);
            for (int i = 0; i < tetr.iterations; i++) {
                blocks = new ArrayList<Block>(Arrays.asList(tetr.getBlocks()));
                blocks.addAll(staticBlocks);
                painter.setBlocks(blocks);
                tetr.changeY(5);
                Thread.sleep(35);
                painter.repaint();
            }
            staticBlocks.addAll(blocks);
        }
    }

    public void keyTyped(KeyEvent e) {
        // TODO Auto-generated method stub

    }

    public void keyPressed(KeyEvent e) {  //I am not sure if this is even called
        switch(e.getKeyCode()){
        case KeyEvent.VK_RIGHT:
            tetr.changeX(20);
            break;
        case KeyEvent.VK_LEFT:
            tetr.changeX(-20);
        }
    }

    public void keyReleased(KeyEvent e) {
        // TODO Auto-generated method stub

    }
}

Answer 1

MainClass未在任何地方使用。

创建一个实例并将一个keylistener添加到窗口对象（ JFrame实例）中，该代码位于MainClass的代码中。使用此window.addKeyListener(new MainClass());

public class MainClass implements KeyListener {

public static Painter painter = new Painter();
public static LShape tetr = new LShape(150, 0);

public static void main(String[] args) throws InterruptedException {
    JFrame window = new JFrame("Tetris");
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setSize(300, 560);
    window.setBackground(Color.BLUE);
     window.addKeyListener(new MainClass()); 
    // window.getContentPane().add((PopupMenu) painter);
    window.setVisible(true);

    ArrayList<Block> blocks = new ArrayList<Block>();
    ArrayList<Block> staticBlocks = new ArrayList<Block>();

    while (true) {
        tetr = new LShape(150, 0);
        for (int i = 0; i < tetr.iterations; i++) {
            blocks = new ArrayList<Block>(Arrays.asList(tetr.getBlocks()));
            blocks.addAll(staticBlocks);
            painter.setBlocks(blocks);
            tetr.changeY(5);
            Thread.sleep(35);
            painter.repaint();
        }
        staticBlocks.addAll(blocks);
    }
}

public void keyTyped(KeyEvent e) {
    // TODO Auto-generated method stub

}

public void keyPressed(KeyEvent e) {  //I am not sure if this is even called
    System.out.println(e.getKeyCode());
    switch (e.getKeyCode()) {
        case KeyEvent.VK_RIGHT:
            // tetr.changeX(20);
            break;
        case KeyEvent.VK_LEFT:
        // tetr.changeX(-20);
    }
}

public void keyReleased(KeyEvent e) {
    // TODO Auto-generated method stub

}
}

Answer 2

还在考虑其他方式，然后至少使用它：

window.getContentPane（）。addKeyListner（new MainClass（））;

如果您与新技术和方法不兼容，请使用上述代码。否则搜索互联网以检查如何使用keyBinding。

更多人说的比我多，但我认为你没有认识到......

Java - 未调用keyPressed事件

2 个答案: