Java 拆下JLabel中的按钮
我有一个java swing项目,如下所示:Java 拆下JLabel中的按钮,java,swing,user-interface,button,jlabel,Java,Swing,User Interface,Button,Jlabel,我有一个java swing项目,如下所示: import javax.swing.JFrame; import javax.swing.JButton; import javax.swing.JPanel; import javax.swing.ImageIcon; import javax.swing.Box; import javax.swing.BoxLayout; import java.awt.BorderLayout; import java.awt.Color; import
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.ImageIcon;
import javax.swing.Box;
import javax.swing.BoxLayout;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
public class DiceGameReplaceDice extends JFrame
{
private JFrame gameFrame;
private JPanel mainPanel;
private JPanel centerPanel = new JPanel();
private JButton diceArray[];
private DiceListener diceListener = new DiceListener();
private ButtonListener buttonListener = new ButtonListener();
private Random rand = new Random();
private int NUM_DICE = 2;
private String diceImages[] = {"./src/1.png", "./src/2.png", "./src/3.png",
"./src/4.png", "./src/5.png", "./src/6.png"};
public static void main(String[] args)
{
new DiceGameReplaceDice();
}
public DiceGameReplaceDice()
{
// Initialize the frame that holds the game
gameFrame = new JFrame();
gameFrame.setSize(800, 600);
gameFrame.setLocation(300, 100);
gameFrame.setTitle("Dice Game");
gameFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Add Panel
mainPanel = new JPanel();
mainPanel.setLayout(new BorderLayout());
// Instantiate a ButtonListener
buttonListener = new ButtonListener();
// Add 1 Button and 1 Label to a newly created panel
// Add new panel to West
JButton buttonW1 = new JButton("Add Die");
buttonW1.setName("W1");
buttonW1.addActionListener(buttonListener);
JPanel panelWest = new JPanel();
panelWest.setLayout(new BoxLayout(panelWest,BoxLayout.Y_AXIS ));
panelWest.setBackground(new Color(0, 0, 122)); // set to blue
panelWest.add(Box.createVerticalGlue());
panelWest.add(buttonW1);
panelWest.add(Box.createVerticalGlue());
mainPanel.add(panelWest, BorderLayout.WEST);
// Create and display center panel with dice
displayCenterPanel();
// Add mainPanel to frame and display the frame
gameFrame.add(mainPanel);
gameFrame.setVisible(true);
}
private void displayCenterPanel()
{
centerPanel = new JPanel();
centerPanel.setLayout(new BoxLayout(centerPanel,BoxLayout.X_AXIS ));
centerPanel.setBackground(new Color(0, 122, 0)); // set to green
centerPanel.add(Box.createHorizontalGlue());
diceArray = new JButton[NUM_DICE];
// Add 2 Buttons to center panel with images of 2 random dice
for (int i=0; i<NUM_DICE; i++)
{
// Create dice button
int dieNum = rand.nextInt(6)+1;
diceArray[i] = new JButton(new ImageIcon(diceImages[dieNum-1]));
diceArray[i].setName("Dice" + i);
diceArray[i].addActionListener(diceListener);
// Add to center panel
centerPanel.add(diceArray[i]);
centerPanel.add(Box.createHorizontalGlue());
}
mainPanel.add(centerPanel, BorderLayout.CENTER);
// Add mainPanel to frame and display the frame
gameFrame.add(mainPanel);
gameFrame.setVisible(true);
}
// Implement an (inner) class that implements ActionListener
class DiceListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
NUM_DICE -= 1;
displayCenterPanel();
}
}
// Implement an (inner) class that implements ActionListener
class ButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String button = ((JButton)e.getSource()).getName();
System.out.println("Button Pressed: " + button);
if (button.equals("W1"))
NUM_DICE ++;
System.out.println(NUM_DICE);
displayCenterPanel();
}
}
}
import javax.swing.JFrame;
导入javax.swing.JButton;
导入javax.swing.JPanel;
导入javax.swing.ImageIcon;
导入javax.swing.Box;
导入javax.swing.BoxLayout;
导入java.awt.BorderLayout;
导入java.awt.Color;
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java.util.Random;
公共类DiceGameReplaceDice扩展了JFrame
{
私有JFrame游戏框架;
私人JPanel主面板;
私有JPanel中心面板=新JPanel();
私有JButton数组[];
private DiceListener DiceListener=新DiceListener();
private ButtonListener ButtonListener=新建ButtonListener();
private Random rand=new Random();
私有整数=2;
私有字符串diceImages[]={“/src/1.png”、“/src/2.png”、“/src/3.png”,
“/src/4.png”、“/src/5.png”、“/src/6.png”};
公共静态void main(字符串[]args)
{
新骰子gamereplacedice();
}
公共骰子gamereplacedice()
{
//初始化保存游戏的框架
gameFrame=newjframe();
游戏框架设置大小(800600);
游戏框架设置位置(300100);
游戏框架。设置标题(“骰子游戏”);
gameFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//添加面板
mainPanel=新的JPanel();
setLayout(新的BorderLayout());
//实例化ButtonListener
buttonListener=新建buttonListener();
//向新创建的面板添加1个按钮和1个标签
//将新面板添加到西部
JButton buttonW1=新JButton(“添加模具”);
按钮1.设置名称(“W1”);
buttonW1.addActionListener(buttonListener);
JPanel panelWest=新的JPanel();
panelWest.setLayout(新的BoxLayout(panelWest,BoxLayout.Y_轴));
setBackground(新颜色(0,0,122));//设置为蓝色
add(Box.createVerticalGlue());
panelWest.add(按钮1);
add(Box.createVerticalGlue());
添加(panelWest,BorderLayout.WEST);
//使用骰子创建和显示中心面板
displayCenterPanel();
//将主面板添加到框架并显示框架
添加(主面板);
gameFrame.setVisible(true);
}
私有void displayCenterPanel()
{
centerPanel=新的JPanel();
centerPanel.setLayout(新的BoxLayout(centerPanel,BoxLayout.X_轴));
centerPanel.setBackground(新颜色(0,122,0));//设置为绿色
添加(Box.createHorizontalGlue());
diceArray=新的JButton[NUM_DICE];
//将2个按钮添加到中间面板,其中包含2个随机骰子的图像
对于(int i=0;i而言,快速修复方法是在添加新面板之前移除中心面板
mainPanel.remove(centerPanel);
作为在displayCenterPanel
中执行的第一件事
但是,您动态操作布局的方式还有很多需要改进的地方。与其每次都创建新面板,不如修改现有面板:
public class DiceGame {
private JPanel centerPanel = new JPanel();
private Random rand = new Random();
private int numDice = 2;
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> new DiceGame());
}
public DiceGame() {
JFrame gameFrame = new JFrame();
gameFrame.setSize(800, 600);
gameFrame.setTitle("Dice Game");
gameFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new BorderLayout());
JButton buttonW1 = new JButton("Add Die");
buttonW1.addActionListener(e -> {
numDice++;
updateCenterPanel();
});
JPanel panelWest = new JPanel();
panelWest.setLayout(new BoxLayout(panelWest, BoxLayout.Y_AXIS));
panelWest.setBackground(new Color(0, 0, 122));
panelWest.add(Box.createVerticalGlue());
panelWest.add(buttonW1);
panelWest.add(Box.createVerticalGlue());
centerPanel.setLayout(new BoxLayout(centerPanel, BoxLayout.X_AXIS));
centerPanel.setBackground(new Color(0, 122, 0));
mainPanel.add(panelWest, BorderLayout.WEST);
mainPanel.add(centerPanel);
gameFrame.add(mainPanel);
gameFrame.setVisible(true);
}
private void updateCenterPanel() {
centerPanel.removeAll();
centerPanel.add(Box.createHorizontalGlue());
JButton[] diceArray = new JButton[numDice];
for (int i = 0; i < numDice; i++) {
diceArray[i] = new JButton(Integer.toString(rand.nextInt(6) + 1));
diceArray[i].setName("Dice" + i);
diceArray[i].addActionListener(e -> {
numDice--;
updateCenterPanel();
});
centerPanel.add(diceArray[i]);
centerPanel.add(Box.createHorizontalGlue());
}
centerPanel.revalidate();
centerPanel.repaint();
}
}
公共类骰子游戏{
私有JPanel中心面板=新JPanel();
private Random rand=new Random();
私有整数=2;
公共静态void main(字符串[]args){
SwingUtilities.invokeLater(()->new DiceGame());
}
公众掷骰子游戏(){
JFrame gameFrame=新JFrame();
游戏框架设置大小(800600);
游戏框架。设置标题(“骰子游戏”);
gameFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel mainPanel=新的JPanel();
setLayout(新的BorderLayout());
JButton buttonW1=新JButton(“添加模具”);
按钮1.addActionListener(e->{
numDice++;
updateCenter面板();
});
JPanel panelWest=新的JPanel();
panelWest.setLayout(新的BoxLayout(panelWest,BoxLayout.Y_轴));
立根(新颜色(0,0,122));
add(Box.createVerticalGlue());
panelWest.add(按钮1);
add(Box.createVerticalGlue());
centerPanel.setLayout(新的BoxLayout(centerPanel,BoxLayout.X_轴));
中心面板。收进背景(新颜色(0,122,0));
添加(panelWest,BorderLayout.WEST);
主面板。添加(中心面板);
添加(主面板);
gameFrame.setVisible(true);
}
私有void updateCenter面板(){
centerPanel.removeAll();
添加(Box.createHorizontalGlue());
JButton[]diceArray=新JButton[numDice];
对于(int i=0;i{
数量--;
updateCenter面板();
});
添加(数组[i]);
添加(Box.createHorizontalGlue());
}
centerPanel.revalidate();
centerPanel.repaint();
}
}
在使组件层次结构无效后,需要重新验证和重新绘制
注意事项:
- 当局部变量可用时,不要创建字段
numDice
不是final
,因此应将其命名为numDice
- 调用
gameFrame.setVisible(true);
当它已经可见时,什么也不做
- 当您有一个工作版本时,请将
JFrame
上的setSize(…)
替换为pack
,并确保正确计算其子项的大小
a)不要显示“近似”代码-您错过的部分可能是最重要的部分。b)在调用displayCenter()
“再次”之前,您是否清除了面板中的所有现有子项?a)我知道,但是,如上所述,我正在手机上编写此代码,因此我没有访问权限