我做了一个小游戏，希望能够使用按钮＆＃34;输入＆＃34;在键盘上运行它，但当我点击进入时没有任何事情发生。 它应该按下按钮点击的功能，但正如我所说，没有任何事情发生。
这是我的代码：
package com.Rohanzpc.Games;
import java.awt.Color;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JTextField;
import java.awt.Font;
import javax.swing.SwingConstants;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.text.DecimalFormat;
public class RNGF extends JFrame implements KeyListener{
private static final long serialVersionUID = 1L;
private JPanel contentPane;
private JTextField txtDice;
private JTextField textCount;
private JTextField textRN;
private JTextField textIn;
private JTextField textMess;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
RNGF frame = new RNGF();
frame.setVisible(true);
frame.setTitle("RNG");
frame.setResizable(false);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public RNGF() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
txtDice = new JTextField();
txtDice.setHorizontalAlignment(SwingConstants.CENTER);
txtDice.setText("Dice Game");
txtDice.setBorder(null);
txtDice.setBackground(new Color(240,240,240));
txtDice.setFont(new Font("Trebuchet MS", Font.PLAIN, 18));
txtDice.setEditable(false);
txtDice.setBounds(159, 11, 106, 27);
contentPane.add(txtDice);
txtDice.setColumns(10);
textCount = new JTextField();
textCount.setEditable(false);
textCount.setBounds(20, 80, 100, 30);
contentPane.add(textCount);
textCount.setColumns(10);
textCount.setText("3");
textRN = new JTextField();
textRN.setEditable(false);
textRN.setBounds(314, 80, 100, 30);
contentPane.add(textRN);
textRN.setColumns(10);
textIn = new JTextField();
textIn.setBounds(159, 143, 106, 27);
contentPane.add(textIn);
textIn.setColumns(10);
JButton btnEnter = new JButton("BET");
btnEnter.setFont(new Font("Trebuchet MS", Font.PLAIN, 11));
btnEnter.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent enter) {
double rn = Math.random() * 10;
DecimalFormat rnFormat = new DecimalFormat("#.0000");
textRN.setText(rnFormat.format(rn));
//Random Number
String InS = textIn.getText();
double in;
in = Double.parseDouble(InS);
if(in > 6) {
in = 6;
}
if(in < 0) {
in = 0;
}
//Input
double credit = 6 - in;
String CoS = textCount.getText();
double count;
count = Double.parseDouble(CoS);
if(in > rn) {
textMess.setText("You won!");
count += credit;
String countT = Double.toString(count);
textCount.setText(countT);
}
else {
count -= 1;
textMess.setText("You lost!");
String countT = Double.toString(count);
textCount.setText(countT);
}
if(count <= 0) {
textCount.setText("0");
textMess.setText("Game over!");
textIn.setEditable(false);
}
System.out.println(rn);
}
});
btnEnter.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
double rn = Math.random() * 10;
DecimalFormat rnFormat = new DecimalFormat("#.0000");
textRN.setText(rnFormat.format(rn));
//Random Number
String InS = textIn.getText();
double in;
in = Double.parseDouble(InS);
if(in > 6) {
in = 6;
}
if(in < 0) {
in = 0;
}
//Input
double credit = 6 - in;
String CoS = textCount.getText();
double count;
count = Double.parseDouble(CoS);
if(in > rn) {
textMess.setText("You won!");
count += credit;
String countT = Double.toString(count);
textCount.setText(countT);
}
else {
count -= 1;
textMess.setText("You lost!");
String countT = Double.toString(count);
textCount.setText(countT);
}
if(count <= 0) {
textCount.setText("0");
textMess.setText("Game over!");
textIn.setEditable(false);
}
System.out.println(rn);
}
});
btnEnter.setBounds(166, 181, 90, 23);
contentPane.add(btnEnter);
textMess = new JTextField();
textMess.setEditable(false);
textMess.setFont(new Font("Tahoma", Font.PLAIN, 13));
textMess.setBounds(146, 71, 136, 39);
contentPane.add(textMess);
textMess.setColumns(10);
}
@Override
public void keyPressed(KeyEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(KeyEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void keyTyped(KeyEvent arg0) {
// TODO Auto-generated method stub
}
}
答案 0 :(得分：0)
为框架设置JButton默认按钮的最简单方法是使用：
getRootPane().setDefaultButton( btnEnter );
现在按下Enter键将调用按钮，无论它是否有焦点。
答案 1 :(得分：-1)
你可以试试这个
getContentPane().registerKeyboardAction(new ActionListener() {
public void actionPerformed(ActionEvent e) {//instructions}
}, KeyStroke.getKeyStroke(KeyEvent.VK_ENTER,0),JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);