【发布时间】：2022-01-13 22:40:54
【问题描述】：
所以我一直在尝试为学校项目制作游戏并想添加一些复活节彩蛋，但为此我需要检测按键输入。我一直在寻找如何做到这一点，但找不到任何可行的方法。我正在使用的设置是制作 JOptionPane 并使用 JDialog 创建它以制作标题并向窗口添加图标。
到目前为止，这是我的代码：
import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.KeyAdapter;
public class ObamaSimulator {
public static void main(String[] args) {
JLabel label; // text in JOptionPane
label = new JLabel("<html><center><b style = 'font-size: 40px; color: red;'>WELCOME</b><p style = 'width: 175px;'><br> To Obama Simulator. In this game you are obama, there isn't really much else to say <br>(The story will tell you more)<br>[press OK to continue or X to quit]", SwingConstants.CENTER);
String choice = JText("Yes", null, label, "Welcome!"); // Runs JText with option 1, option 2, label, and title, and outputs with the option they chose
if(choice == "Yes"){
game();
}else{
System.out.println("Baboon closed the window :(");
label = new JLabel("<html><center><p style = 'width: 175px;'>Game Closed", SwingConstants.CENTER);
JText("OK", null, label, null);
System.exit(0); // Used to end the program, IDK why it dosn't end by it's self
}
}
public static String JText(String op1, String op2, JLabel label, String title){
Object[] options; // Options in JOptionPane
JFrame frm = new JFrame(); // Frame used to make JOptionPane have icon
frm.setIconImage(new ImageIcon("Obama (1).gif").getImage()); // Sets icon of JOptionPane window
if(op1 == null){ // Checks if an option is missing
options = new Object[] {op2};
}else if(op2 == null){
options = new Object[] {op1};
}else{
options = new Object[] {op1, op2};
}
if(title == null){ // Checks if title is missing
title = "Obama Simulator";
}
JOptionPane jp = new JOptionPane(label , JOptionPane.DEFAULT_OPTION, JOptionPane.PLAIN_MESSAGE,null, options, options[0]); // Creates basic JOptionPane
JDialog dialog = jp.createDialog(frm, title); // Finishes by adding icon and title
dialog.setSize(350, 300); // Sets size
dialog.setLocationRelativeTo(null); // Centers the Window
dialog.setResizable(true); // Needed to make icon
dialog.addKeyListener(new KeyListener(){
@Override
public void keyTyped(KeyEvent e) {
// Nothing
}
@Override
public void keyPressed(KeyEvent e) {
// Nothing
}
@Override
public void keyReleased(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_UP){
System.out.println("up");
}
}
});
dialog.setVisible(true); // Sets JOptionPane visible
String choice = (String) jp.getValue(); // Sets Choice to variable
return choice; // Sends choice back to meathod
}
public static void game(){
JLabel label;
String choice;
System.out.println("Baboon picked yes");
label = new JLabel("<html><center><p style = 'width: 175px; font-size: 10px;'>You are Obama, having a lovely day in Minecraft, feeding your dog. You need more quarts and Redstone blocks to build a lighthouse by the sea. While running to your portal room you find an untamed wolf, do you want to tame it?", SwingConstants.CENTER);
choice = JText("Tame", "Dont tame", label, null);
if(choice == "Tame"){
System.out.println("Baboon picked tame");
label = new JLabel("<html><center><p style = 'width: 175px; font-size: 10px;'>You shove a bone deep into the mouth of the wolf. You tame it but it makes you feel horrible, maybe it will make you feel better if you dye the collar?", SwingConstants.CENTER);
choice = JText("Dye", "Dont dye", label, null);
if(choice == "Dye"){
System.out.println("Baboon Dyed");
}
}
// System.exit(0);
}
}
我尝试在对话框上使用 keyListener，但它不起作用，我尝试了其他基本示例并且它们有效，我只是不知道我的问题是什么。
如果您能提供帮助，我将不胜感激！ 提前致谢:)
【问题讨论】：
-
1) 创建一个包含所有静态方法的类是糟糕的设计。 2）当模式对话框可见时，代码会阻塞，直到对话框关闭，这意味着您的
addKeyListener()语句不会执行。 3）不要使用“==”进行字符串比较。而是使用equals(...)方法。 4) 不要使用 KeyListener。相反，您应该使用Key Bindings。阅读 Swing tutorial 了解 Swing 基础知识。有一个关于“键绑定”的部分。此外，任何示例都将向您展示如何更好地构建代码，从而避免使用静态方法。
标签： java swing keylistener