问题

我认为逻辑上应该是这样的： /> d-color:#272822;">[if condition working for only one button at a time] 我已经编写了代码来使得9个JButton在鼠标点击时随机显示其中一种8种颜色之一。我添加了一个JLabel来显示结果，如果所有的JButton都是相同的颜色，我希望结果显示"Winner!"。以下是完整的代码！ style="color:#960050;background-color:#1e0010">```java style="color:#f92672">import javax.swing.*; style="color:#f92672">import java.awt.*; style="color:#f92672">import java.awt.event.ActionEvent; style="color:#f92672">import java.awt.event.ActionListener; style="color:#f92672">import java.util.Random; style="color:#f92672">import static java.awt.Color.*; style="color:#66d9ef">public class buttonTest { public static void main(String[] args) { new buttonTest(); } public buttonTest() { //构造函数。 style="color:#75715e"> EventQueue.invokeLater(new Runnable() { @Override public void run() { JFrame frame = new JFrame("Colour Button 4.0"); frame.add(new colourButton()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class colourButton extends JPanel implements ActionListener { Random rand = new Random(); JButton buttons[]; // 创建一个按钮数组。 style="color:#75715e"> JLabel gameRules = new JLabel("Match the colour buttons."); JLabel timer = new JLabel("00:00 (placeholder)"); JLabel result = new JLabel("Result: (placeholder)"); byte value = 0; public colourButton() { add(gameRules); buttons = new JButton[9]; setLayout(new GridLayout(3, 3)); for (int i = 0; i < buttons.length; i++) { buttons[i] = new JButton("colour button"); buttons[i].setBorderPainted(false); buttons[i].setContentAreaFilled(false); buttons[i].setOpaque(true); buttons[i].addActionListener(this); add(buttons[i]); add(timer); add(result); setVisible(true); } } @Override public void actionPerformed(ActionEvent e) { if (!(e.getSource() instanceof JButton)) { return; } String clickedbutton = e.getActionCommand(); System.out.println(clickedbutton + " button clicked."); JButton button = (JButton) e.getSource(); value++; value %= 9; switch (rand.nextInt(9)) { case 0: button.setBackground(null); case 1: button.setBackground(red); break; case 2: button.setBackground(orange); break; case 3: button.setBackground(yellow); break; case 4: button.setBackground(green); break; case 5: button.setBackground(cyan); break; case 6: button.setBackground(blue); break; case 7: button.setBackground(MAGENTA); break; case 8: button.setBackground(pink); break; } if (button.getBackground() == magenta) { result.setText("magenta"); } else { result.setText("placeholder result"); } } } style="color:#f92672">}


如果按钮数量为9，并且它们都是"这种"颜色，那么就返回这个字符串。

<details>
<summary>英文:</summary>
[if condition working for only one button at a time][1]I have programmed 9 Jbuttons to return one of 8 colors randomly on mouse-click. I have added a Jlabel that returns the result - and I want the result to return a &quot;Winner!&quot; string if all Jbuttons are the same color. 
HERE&#39;S THE FULL CODE!

import javax.swing.;

import java.awt.;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.Random;
import static java.awt.Color.*;
public class buttonTest {
public static void main(String[] args) {
new buttonTest();
}
public buttonTest() { //CONSTRUCTOR.
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame(&quot;Colour Button 4.0&quot;); 
frame.add(new colourButton()); 
frame.pack(); 
frame.setLocationRelativeTo(null); 
frame.setVisible(true);
}
});
}
public class colourButton extends JPanel implements ActionListener { 
Random rand = new Random(); 
JButton buttons[]; // created a button array.
JLabel gameRules = new JLabel(&quot;Match the colour buttons.&quot;); 
JLabel timer = new JLabel(&quot;00:00 (placeholder)&quot;);
JLabel result = new JLabel(&quot;Result: (placeholder)&quot;);
byte value = 0;
public colourButton() {
add(gameRules); 
buttons = new JButton[9];
setLayout(new GridLayout(3, 3));
for (int i = 0; i &lt; buttons.length; i++) { 
buttons[i] = new JButton(&quot;colour button&quot;); 
buttons[i].setBorderPainted(false); 
buttons[i].setContentAreaFilled(false); 
buttons[i].setOpaque(true);
buttons[i].addActionListener(this); 
add(buttons[i]);
add(timer);
add(result);
setVisible(true); 
}
}
@Override
public void actionPerformed(ActionEvent e) {
if (!(e.getSource() instanceof JButton)) { 
return;
}
String clickedbutton = e.getActionCommand();
System.out.println(clickedbutton + &quot; button clicked.&quot;);
JButton button = (JButton) e.getSource(); 
value++; 
value %= 9; 
switch (rand.nextInt(9)) { 
case 0:
button.setBackground(null); 
case 1:
button.setBackground(red);
break;
case 2:
button.setBackground(orange);
break;
case 3:
button.setBackground(yellow);
break;
case 4:
button.setBackground(green);
break;
case 5:
button.setBackground(cyan);
break;
case 6:
button.setBackground(blue);
break;
case 7:
button.setBackground(MAGENTA);
break;
case 8:
button.setBackground(pink);
break;
}
if (button.getBackground() == magenta) {
result.setText(&quot;magenta&quot;);
} else {
result.setText(&quot;placeholder result&quot;);
}
}
}

}

I&#39;d imagine it logically be something like: 
if button count is 9 and if they&#39;re all &#39;this&#39; colour, then return this string.
[1]: https://i.stack.imgur.com/HzwVS.png
</details>
# 答案1
**得分**: 0
以下是翻译好的内容：
当您创建一个Swing应用程序时，您还应该创建一个应用程序的逻辑模型。这是[model / view / controller][1]模式的一个示例。
通过将Swing应用程序的逻辑部分分开，您可以一次专注于应用程序的一个部分。
这是我测试过的GUI。正如您所见，结果文本显示为“Winner!”。
[![Colour Button GUI][2]][2]
我创建了一个`GameModel`类来保存游戏模型，以及一个`ButtonModel`类来保存`JButton`的值和颜色。
测试所有九个ButtonModels的方法是`GameModel`类的`isMatch`方法。您可以看到使用模型大大简化了`ColourButton`类的`actionListener`方法。
以下是代码：
```java
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class JButtonTesting {
public static void main(String[] args) {
new JButtonTesting();
}
private GameModel model;
public JButtonTesting() { // 构造函数。
this.model = new GameModel();
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame("Colour Button 4.0");
frame.add(new ColourButton());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class ColourButton extends JPanel implements ActionListener {
private static final long serialVersionUID = 1L;
Random rand = new Random();
JButton buttons[]; // 创建一个按钮数组。
JLabel gameRules = new JLabel("匹配颜色按钮。");
JLabel timer = new JLabel("00:00 (占位符)");
JLabel result = new JLabel("结果：(占位符)");
int value = 0;
public ColourButton() {
setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
gameRules.setAlignmentX(JLabel.CENTER_ALIGNMENT);
add(gameRules);
JPanel buttonPanel = createButtonPanel();
add(buttonPanel);
timer.setAlignmentX(JLabel.CENTER_ALIGNMENT);
add(timer);
result.setAlignmentX(JLabel.CENTER_ALIGNMENT);
add(result);
}
private JPanel createButtonPanel() {
JPanel buttonPanel = new JPanel();
buttons = new JButton[9];
buttonPanel.setLayout(new GridLayout(0, 3));
for (int i = 0; i < buttons.length; i++) {
buttons[i] = new JButton("颜色按钮");
buttons[i].setActionCommand(Integer.toString(i));
buttons[i].setBorderPainted(false);
buttons[i].setContentAreaFilled(false);
buttons[i].setOpaque(true);
buttons[i].addActionListener(this);
buttonPanel.add(buttons[i]);
}
return buttonPanel;
}
public void setButtonColour(int index, Color colour) {
buttons[index].setBackground(colour);
}
@Override
public void actionPerformed(ActionEvent event) {
if (!(event.getSource() instanceof JButton)) {
return;
}
int buttonIndex = Integer.valueOf(event.getActionCommand());
System.out.println(buttonIndex + "按钮已点击。");
value++;
value %= 9;
model.setColour(buttonIndex, value);
setButtonColour(buttonIndex, model.getColour(buttonIndex));
if (model.isMatch()) {
result.setText("赢家！");
}
}
}
public class GameModel {
private Color[] colours = { null, Color.RED, Color.ORANGE, Color.YELLOW,
Color.GREEN, Color.CYAN, Color.BLUE,
Color.MAGENTA, Color.PINK };
private ButtonModel[] buttonValues;
public GameModel() {
buttonValues = new ButtonModel[9];
for (int i = 0; i < buttonValues.length; i++) {
buttonValues[i] = new ButtonModel();
setColour(i, 0);
}
}
public Color getColour(int index) {
return buttonValues[index].getColour();
}
public void setColour(int index, int value) {
buttonValues[index].setValue(value);
buttonValues[index].setColour(colours[value]);
}
public boolean isMatch() {
int value = buttonValues[0].getValue();
for (int i = 1; i < buttonValues.length; i++) {
if (buttonValues[i].getValue() != value) {
return false;
}
}
return true;
}
}
public class ButtonModel {
private int value;
private Color colour;
public int getValue() {
return value;
}
public void setValue(int value) {
this.value = value;
}
public Color getColour() {
return colour;
}
public void setColour(Color colour) {
this.colour = colour;
}
}
}


英文:
When you create a Swing application, you should also create a logical model of the application.  This is an example of the model / view / controller pattern.
By separating the logical portions of your Swing application, you can focus on one part of the application at a time.
Here's the GUI I tested with.  As you can see, the result text says "Winner!".

I created a GameModel class to hold the game model and a ButtonModel class to hold the value and colour for a JButton.
The method to test all nine ButtonModels is the isMatch method of the GameModel class.  You can see how using a model greatly simplified the actionListener method of the ColourButton class.
Here's the code.
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class JButtonTesting {
public static void main(String[] args) {
new JButtonTesting();
}
private GameModel model;
public JButtonTesting() { // CONSTRUCTOR.
this.model = new GameModel();
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame(&quot;Colour Button 4.0&quot;);
frame.add(new ColourButton());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class ColourButton extends JPanel implements ActionListener {
private static final long serialVersionUID = 1L;
Random rand = new Random();
JButton buttons[]; // created a button array.
JLabel gameRules = new JLabel(&quot;Match the colour buttons.&quot;);
JLabel timer = new JLabel(&quot;00:00 (placeholder)&quot;);
JLabel result = new JLabel(&quot;Result: (placeholder)&quot;);
int value = 0;
public ColourButton() {
setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
gameRules.setAlignmentX(JLabel.CENTER_ALIGNMENT);
add(gameRules);
JPanel buttonPanel = createButtonPanel();
add(buttonPanel);
timer.setAlignmentX(JLabel.CENTER_ALIGNMENT);
add(timer);
result.setAlignmentX(JLabel.CENTER_ALIGNMENT);
add(result);
}
private JPanel createButtonPanel() {
JPanel buttonPanel = new JPanel();
buttons = new JButton[9];
buttonPanel.setLayout(new GridLayout(0, 3));
for (int i = 0; i &lt; buttons.length; i++) {
buttons[i] = new JButton(&quot;colour button&quot;);
buttons[i].setActionCommand(Integer.toString(i));
buttons[i].setBorderPainted(false);
buttons[i].setContentAreaFilled(false);
buttons[i].setOpaque(true);
buttons[i].addActionListener(this);
buttonPanel.add(buttons[i]);
}
return buttonPanel;
}
public void setButtonColour(int index, Color colour) {
buttons[index].setBackground(colour);
}
@Override
public void actionPerformed(ActionEvent event) {
if (!(event.getSource() instanceof JButton)) {
return;
}
int buttonIndex = Integer.valueOf(event.getActionCommand());
System.out.println(buttonIndex + &quot; button clicked.&quot;);
value++;
value %= 9;
model.setColour(buttonIndex, value);
setButtonColour(buttonIndex, model.getColour(buttonIndex));
if (model.isMatch()) {
result.setText(&quot;Winner!&quot;);
}
}
}
public class GameModel {
private Color[] colours = { null, Color.RED, Color.ORANGE, Color.YELLOW, 
Color.GREEN, Color.CYAN, Color.BLUE,
Color.MAGENTA, Color.PINK };
private ButtonModel[] buttonValues;
public GameModel() {
buttonValues = new ButtonModel[9];
for (int i = 0; i &lt; buttonValues.length; i++) {
buttonValues[i] = new ButtonModel();
setColour(i, 0);
}
}
public Color getColour(int index) {
return buttonValues[index].getColour();
}
public void setColour(int index, int value) {
buttonValues[index].setValue(value);
buttonValues[index].setColour(colours[value]);
}
public boolean isMatch() {
int value = buttonValues[0].getValue();
for (int i = 1; i &lt; buttonValues.length; i++) {
if (buttonValues[i].getValue() != value) {
return false;
}
}
return true;
}
}
public class ButtonModel {
private int value;
private Color colour;
public int getValue() {
return value;
}
public void setValue(int value) {
this.value = value;
}
public Color getColour() {
return colour;
}
public void setColour(Color colour) {
this.colour = colour;
}
}
}







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