Java 布局似乎有问题，JButton在调整窗口大小时显示出意外行为
JRE 1.7版更新3 预期行为 当我运行这个程序时，它按预期工作，一切都很顺利。当我点击Java 布局似乎有问题，JButton在调整窗口大小时显示出意外行为,java,swing,resize,jframe,jbutton,Java,Swing,Resize,Jframe,Jbutton,JRE 1.7版更新3 预期行为 当我运行这个程序时，它按预期工作，一切都很顺利。当我点击STOPJButton时，动画停止，同一JButton上的文本变为START。现在，当我点击球的颜色时，球的颜色会改变，球的颜色也会改变，球的颜色也会改变，球的颜色也会改变。如果我按原样运行应用程序而不调整大小，则整个行为都会起作用 意外行为 但是，当我通过拉动右侧来调整我的JFrame的大小时，我的应用程序会出现意外行为，即如果我按下停止JButton，然后单击球颜色按钮，先前单击的JButton上的文本
STOPJButtonJButtonSTART球的颜色会改变，球的颜色也会改变，球的颜色也会改变，球的颜色也会改变。如果我按原样运行应用程序而不调整大小，则整个行为都会起作用
意外行为
但是，当我通过拉动右侧来调整我的JFrame
的大小时，我的应用程序会出现意外行为，即如果我按下停止JButton
，然后单击球颜色按钮，先前单击的JButton
上的文本，如果文本更改为开始
，则在不应更改时将再次更改为停止
，并且球颜色
JButton
的颜色将保持不变，或者在应更改为球颜色时将变为蓝色
。我附上更多信息的图片。但是，如果您尝试将其重新调整为原始大小或更接近原始大小，那么事情就会恢复正常。为什么会这样？任何想法或线索都将不胜感激
当我的应用程序以预期行为运行时，如上所述：
这里是意想不到的行为
底线：
为什么应用程序在开始时运行如常，而不是在通过拖动它的右侧来调整大小时运行如常，但是如果您将它恢复到原始大小或更接近它，事情会恢复正常，它会按预期工作
所以考虑到这个场景，我在程序中是否做错了什么。或者正是在这种情况下，我应该使用SwingWorker
，或者这是布局的问题，还是与内容窗格相关的隐藏内容。请放一些灯：-）
以下是我正在使用的代码，我已将其降至最低，我认为这是为了证明我的问题：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class BallAnimation
{
private int x;
private int y;
private boolean positiveX;
private boolean positiveY;
private boolean isTimerRunning;
private int speedValue;
private int diameter;
private DrawingArea drawingArea;
private Timer timer;
private int colourCounter;
Color[] colours = {
Color.BLUE.darker(),
Color.MAGENTA.darker(),
Color.BLACK.darker(),
Color.RED.darker(),
Color.PINK.darker(),
Color.CYAN.darker(),
Color.DARK_GRAY.darker(),
Color.YELLOW.darker(),
Color.GREEN.darker()
};
private Color backgroundColour;
private Color foregroundColour;
private ActionListener timerAction = new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
x = getX();
y = getY();
drawingArea.setXYColourValues(x, y, backgroundColour
, foregroundColour);
}
};
private JPanel buttonPanel;
private JButton startStopButton;
private JButton speedIncButton;
private JButton speedDecButton;
private JButton resetButton;
private JButton colourButton;
private JButton exitButton;
private ComponentAdapter componentAdapter = new ComponentAdapter()
{
public void componentResized(ComponentEvent ce)
{
timer.restart();
startStopButton.setText("STOP");
isTimerRunning = true;
}
};
public BallAnimation()
{
x = y = 0;
positiveX = positiveY = true;
speedValue = 1;
colourCounter = 0;
isTimerRunning = false;
diameter = 50;
backgroundColour = Color.WHITE.brighter();
foregroundColour = colours[colourCounter];
timer = new Timer(10, timerAction);
}
private void createAndDisplayGUI()
{
JFrame frame = new JFrame("Ball Animation");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationByPlatform(true);
drawingArea = new DrawingArea(x, y
, backgroundColour, foregroundColour, diameter);
drawingArea.addComponentListener(componentAdapter);
frame.add(makeButtonPanel(), BorderLayout.LINE_END);
frame.add(drawingArea, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
private JPanel makeButtonPanel()
{
buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(0, 1));
buttonPanel.setBorder(BorderFactory.createLineBorder(
Color.DARK_GRAY, 5, true));
startStopButton = new JButton("START");
startStopButton.setBackground(Color.GREEN.darker());
startStopButton.setForeground(Color.WHITE.brighter());
startStopButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
System.out.println("START/STOP JButton Clicked!");
if (!isTimerRunning)
{
startStopButton.setText("STOP");
timer.start();
isTimerRunning = true;
buttonPanel.revalidate();
buttonPanel.repaint();
}
else if (isTimerRunning)
{
startStopButton.setText("START");
timer.stop();
isTimerRunning = false;
buttonPanel.revalidate();
buttonPanel.repaint();
}
}
});
startStopButton.setBorder(BorderFactory.createLineBorder(
Color.WHITE, 4, true));
buttonPanel.add(startStopButton);
colourButton = new JButton("BALL COLOUR");
colourButton.setBackground(colours[colourCounter]);
colourButton.setForeground(Color.WHITE);
colourButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
System.out.println("COLOUR JButton Clicked!");
//timer.restart();
colourCounter++;
if (colourCounter == 9)
colourCounter = 0;
foregroundColour = colours[colourCounter];
drawingArea.setXYColourValues(x, y, backgroundColour
, foregroundColour);
//drawingArea.setForegroundForBall(foregroundColour);
colourButton.setBackground(foregroundColour);
colourButton.revalidate();
colourButton.repaint();
//timer.start();
}
});
colourButton.setBorder(BorderFactory.createLineBorder(
Color.WHITE, 2, true));
buttonPanel.add(colourButton);
exitButton = new JButton("EXIT");
exitButton.setBackground(Color.RED.darker());
exitButton.setForeground(Color.WHITE.brighter());
exitButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
System.out.println("EXIT JButton Clicked!");
timer.stop();
System.exit(0);
}
});
exitButton.setBorder(BorderFactory.createLineBorder(
Color.RED.darker().darker(), 4, true));
buttonPanel.add(exitButton);
return buttonPanel;
}
private int getX()
{
if (x < 0)
positiveX = true;
else if (x >= drawingArea.getWidth() - diameter)
positiveX = false;
return (calculateX());
}
private int calculateX()
{
if (positiveX)
return (x += speedValue);
else
return (x -= speedValue);
}
private int getY()
{
if (y < 0)
positiveY = true;
else if (y >= drawingArea.getHeight() - diameter)
positiveY = false;
return (calculateY());
}
private int calculateY()
{
if (positiveY)
return (y += speedValue);
else
return (y -= speedValue);
}
public static void main(String... args)
{
Runnable runnable = new Runnable()
{
public void run()
{
new BallAnimation().createAndDisplayGUI();
}
};
SwingUtilities.invokeLater(runnable);
}
}
class DrawingArea extends JComponent
{
private int x;
private int y;
private int ballDiameter;
private Color backgroundColor;
private Color foregroundColor;
public DrawingArea(int x, int y
, Color bColor, Color fColor, int dia)
{
this.x = x;
this.y = y;
ballDiameter = dia;
backgroundColor = bColor;
foregroundColor = fColor;
setBorder(BorderFactory.createLineBorder(
Color.DARK_GRAY.darker(), 5, true));
}
public void setXYColourValues(int x, int y
, Color bColor, Color fColor)
{
this.x = x;
this.y = y;
backgroundColor = bColor;
foregroundColor = fColor;
repaint();
}
public Dimension getPreferredSize()
{
return (new Dimension(500, 400));
}
public void paintComponent(Graphics g)
{
g.setColor(backgroundColor);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(foregroundColor);
g.fillOval(x, y, ballDiameter, ballDiameter);
}
}
import java.awt.*；
导入java.awt.event.*；
导入javax.swing.*；
公共课叙事
{
私人INTX；
私营企业；
私有布尔正性；
私有布尔正性；
私有布尔运算；
私人价值；
私有内径；
私人提款区提款区；
私人定时器；
私人染色柜；
颜色[]颜色={
Color.BLUE.dark（），
Color.Pigenta.darker（），
Color.BLACK.深色（），
Color.RED.dark（），
Color.PINK.深色（），
Color.CYAN.darker（），
颜色。深灰色。较深（），
Color.YELLOW.深色（），
Color.GREEN.深色（）
};
私人色彩背景色；
私人色彩；
私有ActionListener timerAction=新ActionListener（）
{
已执行的公共无效行动（行动事件ae）
{
x=getX（）；
y=getY（）；
绘图区域设置XYcolorValues（x，y，背景色
，前底色）；
}
};
私人JPanel按钮面板；
私人JButton startStopButton；
私人JButton speedIncButton；
私人JButton speedDecButton；
私有JButton重置按钮；
私人JButton彩色按钮；
私有JButton exitButton；
专用ComponentAdapter ComponentAdapter=新ComponentAdapter（）
{
public void componentResistized（ComponentEvent ce）
{
timer.restart（）；
startStopButton.setText（“停止”）；
isTimerRunning=true；
}
};
公共民谣（）
{
x=y=0；
positiveX=positiveY=true；
速度值=1；
色度计数器=0；
isTimerRunning=false；
直径=50；
backgroundcolor=Color.WHITE.brighter（）；
ForeGroundColor=颜色[颜色计数器]；
定时器=新定时器（10，定时器）；
}
私有void createAndDisplayGUI（）
{
JFrame=新JFrame（“球动画”）；
frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）；
frame.setLocationByPlatform（真）；
图纸面积=新图纸面积（x，y
，背景色，背景色，直径）；
drawingArea.addComponentListener（componentAdapter）；
frame.add（makeButtonPanel（），BorderLayout.LINE_END）；
添加（绘图区域、边框布局、中心）；
frame.pack（）；
frame.setVisible（true）；
}
私有JPanel makeButtonPanel（）
{
buttonPanel=新的JPanel（）；
setLayout（新的GridLayout（0,1））；
buttonPanel.setBorder（BorderFactory.createLineBorder(
颜色：深灰色，5，真）；
startStopButton=新的JButton（“开始”）；
startStopButton.setBackground（Color.GREEN.darker（））；
startStopButton.setForeground（Color.WHITE.brighter（））；
startStopButton.addActionListener（新ActionListener（）
{
已执行的公共无效行动（行动事件ae）
{
System.out.println（“单击启动/停止JButton！”）；
如果（！正在运行）
{
startStopButton.setText（“停止”）；
colourButton = new JButton( "BALL COLOUR" );
colourButton.setOpaque( true );
colourButton.setBackground( colours[ colourCounter ] );
colourButton.setForeground( Color.WHITE );
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.Queue;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
/** @see https://stackoverflow.com/q/9849950/230513 */
public class BallAnimation {
private int x;
private int y;
private boolean positiveX;
private boolean positiveY;
private boolean isTimerRunning;
private int speedValue;
private int diameter;
private DrawingArea drawingArea;
private Timer timer;
private Queue<Color> clut = new LinkedList<Color>(Arrays.asList(
Color.BLUE.darker(),
Color.MAGENTA.darker(),
Color.BLACK,
Color.RED.darker(),
Color.PINK,
Color.CYAN.darker(),
Color.DARK_GRAY,
Color.YELLOW.darker(),
Color.GREEN.darker()));
private Color backgroundColour;
private Color foregroundColour;
private ActionListener timerAction = new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
x = getX();
y = getY();
drawingArea.setXYColourValues(x, y, backgroundColour, foregroundColour);
}
};
private JPanel buttonPanel;
private JButton startStopButton;
private JButton speedIncButton;
private JButton speedDecButton;
private JButton resetButton;
private JButton colourButton;
private JButton exitButton;
private ComponentAdapter componentAdapter = new ComponentAdapter() {
@Override
public void componentResized(ComponentEvent ce) {
timer.restart();
startStopButton.setText("Stop");
isTimerRunning = true;
}
};
public BallAnimation() {
x = y = 0;
positiveX = positiveY = true;
speedValue = 1;
isTimerRunning = false;
diameter = 50;
backgroundColour = Color.white;
foregroundColour = clut.peek();
timer = new Timer(10, timerAction);
}
private void createAndDisplayGUI() {
JFrame frame = new JFrame("Ball Animation");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationByPlatform(true);
drawingArea = new DrawingArea(x, y, backgroundColour, foregroundColour, diameter);
drawingArea.addComponentListener(componentAdapter);
frame.add(makeButtonPanel(), BorderLayout.LINE_END);
frame.add(drawingArea, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
private JPanel makeButtonPanel() {
buttonPanel = new JPanel(new GridLayout(0, 1));
buttonPanel.setBorder(BorderFactory.createLineBorder(Color.darkGray, 5));
startStopButton = new JButton("Start");
startStopButton.setOpaque(true);
startStopButton.setForeground(Color.white);
startStopButton.setBackground(Color.green.darker());
startStopButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
if (!isTimerRunning) {
startStopButton.setText("Stop");
timer.start();
isTimerRunning = true;
} else if (isTimerRunning) {
startStopButton.setText("Start");
timer.stop();
isTimerRunning = false;
}
}
});
startStopButton.setBorder(BorderFactory.createLineBorder(Color.gray, 4));
buttonPanel.add(startStopButton);
colourButton = new JButton("Change Color");
colourButton.setOpaque(true);
colourButton.setForeground(Color.white);
colourButton.setBackground(clut.peek());
colourButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
//timer.restart();
clut.add(clut.remove());
foregroundColour = clut.peek();
drawingArea.setXYColourValues(x, y, backgroundColour, foregroundColour);
colourButton.setBackground(foregroundColour);
}
});
colourButton.setBorder(BorderFactory.createLineBorder(Color.gray, 4));
buttonPanel.add(colourButton);
exitButton = new JButton("Exit");
exitButton.setBackground(Color.red);
exitButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
timer.stop();
System.exit(0);
}
});
exitButton.setBorder(BorderFactory.createLineBorder(Color.red.darker(), 4));
buttonPanel.add(exitButton);
return buttonPanel;
}
private int getX() {
if (x < 0) {
positiveX = true;
} else if (x >= drawingArea.getWidth() - diameter) {
positiveX = false;
}
return (calculateX());
}
private int calculateX() {
if (positiveX) {
return (x += speedValue);
} else {
return (x -= speedValue);
}
}
private int getY() {
if (y < 0) {
positiveY = true;
} else if (y >= drawingArea.getHeight() - diameter) {
positiveY = false;
}
return (calculateY());
}
private int calculateY() {
if (positiveY) {
return (y += speedValue);
} else {
return (y -= speedValue);
}
}
public static void main(String... args) {
Runnable runnable = new Runnable() {
@Override
public void run() {
new BallAnimation().createAndDisplayGUI();
}
};
SwingUtilities.invokeLater(runnable);
}
}
class DrawingArea extends JComponent {
private int x;
private int y;
private int ballDiameter;
private Color backgroundColor;
private Color foregroundColor;
public DrawingArea(int x, int y, Color bColor, Color fColor, int dia) {
this.x = x;
this.y = y;
ballDiameter = dia;
backgroundColor = bColor;
foregroundColor = fColor;
setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 5));
}
public void setXYColourValues(int x, int y, Color bColor, Color fColor) {
this.x = x;
this.y = y;
backgroundColor = bColor;
foregroundColor = fColor;
repaint();
}
@Override
public Dimension getPreferredSize() {
return (new Dimension(500, 400));
}
@Override
public void paintComponent(Graphics g) {
g.setColor(backgroundColor);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(foregroundColor);
g.fillOval(x, y, ballDiameter, ballDiameter);
}
}
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class BallAnimation
{
private int x;
private int y;
private boolean positiveX;
private boolean positiveY;
private boolean isTimerRunning;
private int speedValue;
private int diameter;
private DrawingArea drawingArea;
private Timer timer;
private int colourCounter;
Color[] colours = {
Color.BLUE.darker(),
Color.MAGENTA.darker(),
Color.BLACK.darker(),
Color.RED.darker(),
Color.PINK.darker(),
Color.CYAN.darker(),
Color.DARK_GRAY.darker(),
Color.YELLOW.darker(),
Color.GREEN.darker()
};
private Color backgroundColour;
private Color foregroundColour;
private ActionListener timerAction = new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
x = getX();
y = getY();
drawingArea.setXYColourValues(x, y, backgroundColour
, foregroundColour);
}
};
private JPanel buttonPanel;
private JButton startStopButton;
private JButton speedIncButton;
private JButton speedDecButton;
private JButton resetButton;
private JButton colourButton;
private JButton exitButton;
private ComponentAdapter componentAdapter = new ComponentAdapter()
{
public void componentResized(ComponentEvent ce)
{
timer.restart();
}
};
public BallAnimation()
{
x = y = 0;
positiveX = positiveY = true;
speedValue = 1;
colourCounter = 0;
isTimerRunning = false;
diameter = 50;
backgroundColour = Color.WHITE.brighter();
foregroundColour = colours[colourCounter];
timer = new Timer(10, timerAction);
}
private void createAndDisplayGUI()
{
JFrame frame = new JFrame("Ball Animation");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationByPlatform(true);
drawingArea = new DrawingArea(x, y
, backgroundColour, foregroundColour, diameter);
drawingArea.addComponentListener(componentAdapter);
frame.add(makeButtonPanel(), BorderLayout.LINE_START);
frame.add(drawingArea, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
private JPanel makeButtonPanel()
{
buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(0, 1));
buttonPanel.setBorder(BorderFactory.createLineBorder(
Color.DARK_GRAY, 5, true));
colourButton = new JButton("BALL COLOUR");
colourButton.setOpaque(true);
colourButton.setBackground(colours[colourCounter]);
colourButton.setForeground(Color.WHITE);
colourButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
System.out.println("COLOUR JButton Clicked!");
if (timer.isRunning())
timer.stop();
colourCounter++;
if (colourCounter == 9)
colourCounter = 0;
foregroundColour = colours[colourCounter];
drawingArea.setXYColourValues(x, y, backgroundColour
, foregroundColour);
colourButton.setBackground(foregroundColour);
if (!timer.isRunning())
timer.start();
}
});
colourButton.setBorder(BorderFactory.createLineBorder(
Color.WHITE, 2, true));
buttonPanel.add(colourButton);
return buttonPanel;
}
private int getX()
{
if (x < 0)
positiveX = true;
else if (x >= drawingArea.getWidth() - diameter)
positiveX = false;
return (calculateX());
}
private int calculateX()
{
if (positiveX)
return (x += speedValue);
else
return (x -= speedValue);
}
private int getY()
{
if (y < 0)
positiveY = true;
else if (y >= drawingArea.getHeight() - diameter)
positiveY = false;
return (calculateY());
}
private int calculateY()
{
if (positiveY)
return (y += speedValue);
else
return (y -= speedValue);
}
public static void main(String... args)
{
Runnable runnable = new Runnable()
{
public void run()
{
new BallAnimation().createAndDisplayGUI();
}
};
SwingUtilities.invokeLater(runnable);
}
}
class DrawingArea extends JComponent
{
private int x;
private int y;
private int ballDiameter;
private Color backgroundColor;
private Color foregroundColor;
public DrawingArea(int x, int y
, Color bColor, Color fColor, int dia)
{
this.x = x;
this.y = y;
ballDiameter = dia;
backgroundColor = bColor;
foregroundColor = fColor;
setBorder(BorderFactory.createLineBorder(
Color.DARK_GRAY.darker(), 5, true));
}
public void setXYColourValues(int x, int y
, Color bColor, Color fColor)
{
this.x = x;
this.y = y;
backgroundColor = bColor;
foregroundColor = fColor;
repaint();
}
public Dimension getPreferredSize()
{
return (new Dimension(500, 400));
}
public void paintComponent(Graphics g)
{
g.setColor(backgroundColor);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(foregroundColor);
g.fillOval(x, y, ballDiameter, ballDiameter);
}
}