在Java中从另一个窗口检查和更改JLabel状态
所以我有两个窗口，利用两个独立的类。我的主窗口有分层的jlabel，其中包含图像，我希望能够使用setVisible命令使用第二个窗口中的复选框来回切换这些图像。我使用windowbuilder创建窗口和可视元素，因此代码让我有点困惑。我尝试过创建setter和getter，但eclipse一直告诉我“标记“boolean”上的语法错误，@expected”，这并没有什么帮助。也许我已经站得太久了，但我不知道我是否把得手和二传手放在了正确的位置。这是我的主窗口的一些代码在Java中从另一个窗口检查和更改JLabel状态,java,swing,jframe,Java,Swing,Jframe,所以我有两个窗口，利用两个独立的类。我的主窗口有分层的jlabel，其中包含图像，我希望能够使用setVisible命令使用第二个窗口中的复选框来回切换这些图像。我使用windowbuilder创建窗口和可视元素，因此代码让我有点困惑。我尝试过创建setter和getter，但eclipse一直告诉我“标记“boolean”上的语法错误，@expected”，这并没有什么帮助。也许我已经站得太久了，但我不知道我是否把得手和二传手放在了正确的位置。这是我的主窗口的一些代码 public class
public class ChristmasTree {
private JFrame frame;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ChristmasTree window = new ChristmasTree();
window.frame.setVisible(true);
ControlWindow.createWindow();
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public ChristmasTree() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setBounds(200, 50, 500, 625);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLayeredPane layeredPane = new JLayeredPane();
GroupLayout groupLayout = new GroupLayout(frame.getContentPane());
groupLayout.setHorizontalGroup(
groupLayout.createParallelGroup(Alignment.LEADING)
.addComponent(layeredPane, Alignment.TRAILING, GroupLayout.DEFAULT_SIZE, 484, Short.MAX_VALUE)
);
groupLayout.setVerticalGroup(
groupLayout.createParallelGroup(Alignment.LEADING)
.addGroup(groupLayout.createSequentialGroup()
.addGap(1)
.addComponent(layeredPane, GroupLayout.DEFAULT_SIZE, 561, Short.MAX_VALUE))
);
JLayeredPane backGround = new JLayeredPane();
backGround.setBounds(0, 0, 484, 586);
layeredPane.add(backGround);
JLayeredPane treePane = new JLayeredPane();
layeredPane.setLayer(treePane, 0);
treePane.setBounds(0, 0, 484, 586);
layeredPane.add(treePane);
JLabel treeLabel = new JLabel("");
treePane.setLayer(treeLabel, 0);
treeLabel.setIcon(new ImageIcon(ChristmasTree.class.getResource("/resources/tree.png")));
treeLabel.setBounds(0, 0, 484, 586);
treePane.add(treeLabel);
JLayeredPane decorationsPane = new JLayeredPane();
layeredPane.setLayer(decorationsPane, 2);
decorationsPane.setBounds(0, 0, 484, 586);
layeredPane.add(decorationsPane);
decorationsPane.setVisible(true);
JLabel starLabel = new JLabel("");
starLabel.setIcon(new ImageIcon(ChristmasTree.class.getResource("/resources/star.png")));
starLabel.setBounds(0, 0, 484, 586);
decorationsPane.add(starLabel);
starLabel.setVisible(false);
public class ControlWindow extends ChristmasTree {
private JFrame frame;
private boolean isSnowSelected = false;
/**
* Launch the application.
*/
public static void createWindow() {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ControlWindow window = new ControlWindow();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public ControlWindow() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setBounds(700, 100, 455, 231);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ChristmasTree myChristmasTree = new ChristmasTree();
JLabel chooseLabel = new JLabel("");
chooseLabel.setIcon(new ImageIcon(ControlWindow.class.getResource("/resources/message.png")));
final JCheckBox chckbxSnow = new JCheckBox("Snow");
chckbxSnow.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
if (isSnowSelected == false)
{
}
else if (isSnowSelected == true)
{
}
if (isSnowSelected == true)
{
isSnowSelected = false;
}
else
{
isSnowSelected = true;
}
}
});
整个isSnowSelected boolean我正计划做其他事情，但是如果我能得到一个返回的boolean，我就可以写得容易得多。有什么想法吗？顺便说一句，我真的很感谢大家不断阅读像我这样的问题，很高兴知道有人真正关心我。两个窗口的代码中都没有链接。在启动
actionPerformed（）子窗口中有主窗口的引用
，以设置主窗口的复选框
属性。最好的方法是在主窗口和子窗口之间创建一个Delegate
类，该类将执行复选框的启用/禁用操作。除此之外，在类
级别中只有框架
引用，所有其他组件都在方法
级别。要更改窗口中组件的属性，需要在类
级别声明它们。请为窗口的所有组件创建setter
和getter
。那真的很有帮助。希望这有帮助为什么不选择一个静态变量作为复选框的状态（显示或隐藏）
这将是按类名访问的，它将显示标签可见性的当前状态
public class ABC {
public JFrame frame;
private static boolean isSnowSelected = false;
private JLayeredPane layeredPane;
JLayeredPane backGround;
JLayeredPane treePane;
JLayeredPane decorationsPane;
JLabel starLabel;
JLabel treeLabel;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ABC window = new ABC();
window.frame.setVisible(true);
ABC window1 = new ABC();
window1.frame.setVisible(true);
ControlWindow.createWindow();
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public ABC() {
initialize();
runth();
}
public void runth(){
Thread th = new Thread() {
public void run() {
while (true) {
if (isSnowSelected) {
treeLabel.setVisible(true);
starLabel.setVisible(false);
} else {
treeLabel.setVisible(false);
starLabel.setVisible(true);
}
}
}
};
th.start();
}
public static boolean getSelected() {
return isSnowSelected;
}
public static void setSelected(boolean value) {
isSnowSelected = value;
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
try {
frame = new JFrame();
frame.setBounds(200, 50, 500, 625);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
layeredPane = new JLayeredPane();
GroupLayout groupLayout = new GroupLayout(frame.getContentPane());
groupLayout.setHorizontalGroup(
groupLayout.createParallelGroup(Alignment.LEADING)
.addComponent(layeredPane, Alignment.TRAILING, GroupLayout.DEFAULT_SIZE, 484, Short.MAX_VALUE));
groupLayout.setVerticalGroup(
groupLayout.createParallelGroup(Alignment.LEADING)
.addGroup(groupLayout.createSequentialGroup()
.addGap(1)
.addComponent(layeredPane, GroupLayout.DEFAULT_SIZE, 561, Short.MAX_VALUE)));
backGround = new JLayeredPane();
backGround.setBounds(0, 0, 484, 586);
layeredPane.add(backGround);
treePane = new JLayeredPane();
layeredPane.setLayer(treePane, 0);
treePane.setBounds(0, 0, 484, 586);
layeredPane.add(treePane);
treeLabel = new JLabel("");
treePane.setLayer(treeLabel, 0);
treeLabel.setIcon(new ImageIcon(ABC.class.getResource("/resources/tree.png")));
treeLabel.setBounds(0, 0, 484, 586);
treePane.add(treeLabel);
decorationsPane = new JLayeredPane();
layeredPane.setLayer(decorationsPane, 2);
decorationsPane.setBounds(0, 0, 484, 586);
layeredPane.add(decorationsPane);
decorationsPane.setVisible(true);
starLabel = new JLabel("");
starLabel.setIcon(new ImageIcon(ABC.class.getResource("/resources/star.png")));
starLabel.setBounds(0, 0, 484, 586);
decorationsPane.add(starLabel);
starLabel.setVisible(true);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
帮助您解决问题的示例代码。在此示例中，如果选择了大型机的
JCheckBox
，则它也会将其他帧的
JCheckBox
设置为选中
public class MainFrame extends JFrame {
private OtherFrame c = null;
JCheckBox checkbox = new JCheckBox();
public MainFrame() {
addActionListener();
}
public void setC(OtherFrame c) {
this.c = c;
}
private void addActionListener() {
checkbox.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//performs operation
if (checkbox.isSelected()) {
c.checkbox.setSelected(true);
}
}
});
}
}
public class OtherFrame extends JFrame {
JCheckBox checkbox = new JCheckBox();
public OtherFrame() {
addActionListener();
}
private void addActionListener() {
checkbox.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//performs operation
}
});
}
}
考虑使用A来切换。基本上，您需要对子窗口中的主窗口进行引用，然后需要子窗口将它的愿望传递给子窗口。我可以考虑的是使用某种类型的模型，这两个窗口都有参考。主窗口将侦听对模型的更改，而子窗口将告诉它需要进行哪些更改。这将使您的UI解耦，并防止子窗口使用主窗口执行不应该执行的操作
public class MainFrame extends JFrame {
private OtherFrame c = null;
JCheckBox checkbox = new JCheckBox();
public MainFrame() {
addActionListener();
}
public void setC(OtherFrame c) {
this.c = c;
}
private void addActionListener() {
checkbox.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//performs operation
if (checkbox.isSelected()) {
c.checkbox.setSelected(true);
}
}
});
}
}
public class OtherFrame extends JFrame {
JCheckBox checkbox = new JCheckBox();
public OtherFrame() {
addActionListener();
}
private void addActionListener() {
checkbox.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//performs operation
}
});
}
}