如何解决如何使用JTextField和JButton制作具有名称填充功能的菜单？
所以我正在尝试制作一个面板，让玩家在本地棋盘游戏中配置玩家的姓名。
我希望他们能够在2到6之间添加播放器，因此默认情况下，我使面板显示2个JTextField框供他们添加名称，在第二个框下方有一个“ +”按钮以添加一个额外的玩家。但是我不知道该怎么做以及如何执行这种操作，当用户按下“ +”按钮时，会弹出一个新的JTextField，供玩家添加新的玩家名称。
我正在提供用于此特定面板的代码，但有必要为窗口提供整个代码。任何帮助表示感谢，并在此先感谢。
private void setLocalPanel() {
GridBagConstraints c = new GridBagConstraints();
// localButtonsPanel config
localButtonsPanel = new JPanel(new GridLayout(0,1,10));
localButtonsPanel.setOpaque(false);
// nameBox1 config
nameBox1 = new JTextField("Player name");
nameBox1.setBackground(new Color(255,255,255));
nameBox1.setEditable(true);
c.ipady = 10;
localButtonsPanel.add(nameBox1,c);
// nameBox2 config
nameBox2 = new JTextField("Player name");
nameBox2.setBackground(new Color(255,255));
nameBox2.setEditable(true);
localButtonsPanel.add(nameBox2,c);
// + config
extraBtn = new JButton("+");
extraBtn.setForeground(new Color(255,255));
extraBtn.setFont(new Font("Segoe Script",Font.BOLD,40));
extraBtn.setOpaque(false);
extraBtn.setContentAreaFilled(false);
extraBtn.setBorderPainted(false);
extraBtn.setFocusPainted(false);
localButtonsPanel.add(extraBtn,new GridBagConstraints());
c.gridy = 0;
localPanel.add(localButtonsPanel,c);
// startBtn config
startBtn = new JButton("Start");
startBtn.setForeground(new Color(255,255));
startBtn.setFont(new Font("Segoe Script",40));
startBtn.setOpaque(false);
startBtn.setContentAreaFilled(false);
startBtn.setBorderPainted(false);
startBtn.setFocusPainted(false);
c.gridy = 1;
localPanel.add(startBtn,c);
// localBackBtn config
localBackBtn = new JButton("Back");
localBackBtn.setForeground(new Color(255,255));
localBackBtn.setFont(new Font("Segoe Script",40));
localBackBtn.setOpaque(false);
localBackBtn.setContentAreaFilled(false);
localBackBtn.setBorderPainted(false);
localBackBtn.setFocusPainted(false);
c.gridy = 2;
localPanel.add(localBackBtn,c);
setLocalActions();
}
private void setLocalActions() {
// startBtn config
startBtn.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
startBtn.setForeground(new Color(200,210,10));
startBtn.setText("> Start <");
}
public void mouseExited(MouseEvent e) {
startBtn.setForeground(new Color(255,255));
startBtn.setText("Start");
}
public void mouseClicked(MouseEvent e) {
// nameBox1.getText()
// nameBox2.getText()
localPanel.setVisible(false);
gamePanel.setVisible(true);
}
});
// localBackBtn config
localBackBtn.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
localBackBtn.setForeground(new Color(200,10));
localBackBtn.setText("> Back <");
}
public void mouseExited(MouseEvent e) {
localBackBtn.setForeground(new Color(255,255));
localBackBtn.setText("Back");
}
public void mouseClicked(MouseEvent e) {
localPanel.setVisible(false);
playPanel.setVisible(true);
}
});
}
PS。 localPanel有一个GridBagLayout。
解决方法
您需要将ActionListener添加到JButton而不是MouseListener。请参阅How to Use Buttons。
单击+按钮时，您要向JTextField添加新的JPanel，其中包含允许用户输入玩家名称的字段。
以下是根据您的问题代码改编而成的代码，当用户单击JTextField按钮时，会添加一个+。有关代码的注释出现在其后。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;
public class PlayGame implements ActionListener,Runnable {
private static final int MAX_PLAYERS = 6;
private static final String BACK = "Back";
private static final String PLUS = "+";
private static final String START = "Start";
private ArrayList<JTextField> playerNameTextFields;
private GridBagConstraints gbc;
private JFrame frame;
private JPanel localButtonsPanel;
public PlayGame() {
playerNameTextFields = new ArrayList<>();
}
@Override // java.lang.Runnable
public void run() {
showGui();
}
@Override // java.awt.event.ActionListener
public void actionPerformed(ActionEvent event) {
String actionCommand = event.getActionCommand();
switch (actionCommand) {
case BACK:
// Add code to execute when user clicks 'Back' button.
break;
case PLUS:
addPlayerNameTextField();
localButtonsPanel.revalidate();
localButtonsPanel.repaint();
if (playerNameTextFields.size() >= MAX_PLAYERS) {
((JButton) event.getSource()).setEnabled(false);
}
break;
case START:
// Add code to execute when user clicks 'Start' button.
break;
default:
System.out.println("Not implemented: " + actionCommand);
}
}
private void addPlayerNameTextField() {
JTextField playerNameTextField = new JTextField(10);
playerNameTextField.setName("player" + playerNameTextFields.size());
playerNameTextFields.add(playerNameTextField);
gbc.gridy++;
localButtonsPanel.add(playerNameTextField,gbc);
}
private JPanel createLocalPanel() {
JPanel localPanel = new JPanel(new GridBagLayout());
localPanel.setOpaque(false);
GridBagConstraints c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 0;
c.insets.top = 10;
localButtonsPanel = new JPanel(new GridBagLayout());
gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = -1;
gbc.insets.top = 10;
localButtonsPanel.setPreferredSize(new Dimension(120,200));
localButtonsPanel.setOpaque(false);
addPlayerNameTextField();
addPlayerNameTextField();
localPanel.add(localButtonsPanel,c);
c.gridy = 1;
JButton extraBtn = new JButton(PLUS);
extraBtn.setFont(new Font("Segoe Script",Font.BOLD,40));
extraBtn.setForeground(Color.WHITE);
extraBtn.setContentAreaFilled(false);
extraBtn.setBorderPainted(false);
extraBtn.setFocusPainted(false);
extraBtn.addActionListener(this);
extraBtn.setToolTipText("Add another player");
localPanel.add(extraBtn,c);
c.gridy = 2;
JButton startBtn = new JButton(START);
startBtn.setForeground(Color.WHITE);
startBtn.setFont(new Font("Segoe Script",40));
startBtn.setContentAreaFilled(false);
startBtn.setBorderPainted(false);
startBtn.setFocusPainted(false);
startBtn.addActionListener(this);
localPanel.add(startBtn,c);
JButton localBackBtn = new JButton(BACK);
localBackBtn.setForeground(Color.WHITE);
localBackBtn.setFont(new Font("Segoe Script",40));
localBackBtn.setContentAreaFilled(false);
localBackBtn.setBorderPainted(false);
localBackBtn.setFocusPainted(false);
localBackBtn.addActionListener(this);
c.gridy = 3;
localPanel.add(localBackBtn,c);
return localPanel;
}
private void showGui() {
frame = new JFrame();
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().setBackground(Color.DARK_GRAY);
frame.add(createLocalPanel(),BorderLayout.CENTER);
frame.setSize(800,600);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
/**
* Start here.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new PlayGame());
}
}
请注意，当您在setContentAreaFilled(false)上致电JButton时，就不必同时致电setOpaque(false)。
您可以在类new java.awt.Color(255,255,255)中使用常量WHITE代替java.awt.Color。
GridLayout和GridBagLayout不同。请参阅Laying Out Components Within a Container
我没有像您一样使用背景图像，而是将背景颜色设置为深灰色。
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