我正在尝试更改Jlabel符合条件的文本，该文本将添加到另一个标签中。但是更新的文本与先前的文本重叠。
public class FGtest extends JFrame {
public FGtest() {
JLabel fg_layout = new JLabel();
ImageIcon fgImageIcon = new ImageIcon(getClass().getResource("images/overall layout.JPG"));
fg_layout.setIcon(fgImageIcon);
Gradient gradient_layout = new Gradient();
gradient_layout.add(fg_layout);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new FGtest();
}
});
}
@SuppressWarnings("serial")
class Gradient extends JPanel {
private String wpl_test = "";
private String wpl1_status = "";
private String wpl2_status = "";
private Jedis jedis;
public Gradient() {
new Timer(1000, new TimerListener()).start();
}
private class TimerListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent ae) {
try {
jedis = new Jedis("192.168.0.140");
wpl_test = jedis.get("wpl_test");
wpl1_status = jedis.get("wpl1_status");
wpl2_status = jedis.get("wpl2_status");
repaint();
} catch (Exception e) {
}
}
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2D = (Graphics2D) g;
AlphaComposite alphaComposite = AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.7 f);
g2D.setComposite(alphaComposite);
//-------wpl test----
JLabel label11 = new JLabel();
label11.setFont(new Font("Times New Roman", Font.BOLD, 30));
label11.setBounds(800, 229, 300, 100);
label11.setForeground(Color.orange);
fg_layout.add(label11);
if (wpl_test.equals("1")) {
// label2.setVisible(false);
// fg_layout.remove(label2);
// label2.setBounds(800,229,0,0);
// JLabel label1 = new JLabel();
// label1.setFont(new Font("Times New Roman",Font.BOLD,30));
// label1.setBounds(800,229,300,100);
// label1.setText("wpl 1:1");
// label1.setForeground(Color.orange);
// fg_layout.add(label1);
label11.setText("wpl 1:1");
if (wpl1_status.equals("pass")) {
g2D.setColor(Color.green);
int x1[] = {
610,
1057,
1017,
520
};
int y1[] = {
120,
350,
485,
220
};
g2D.fillPolygon(x1, y1, 4);
} else if (wpl1_status.equals("fail")) {
g2D.setColor(Color.red);
int x1[] = {
610,
1057,
1017,
520
};
int y1[] = {
120,
350,
485,
220
};
g2D.fillPolygon(x1, y1, 4);
}
} else if (wpl_test.equals("2")) {
// label1.setVisible(false);
// fg_layout.remove(label11);
// label1.setBounds(800,229,0,0);
// JLabel label2 = new JLabel();
// label2.setFont(new Font("Times New Roman",Font.BOLD,30));
// label2.setBounds(800,229,300,100);
// label2.setText("wpl as such");
// label2.setForeground(Color.orange);
// fg_layout.add(label2);
label11.setText("wpl as such");
if (wpl2_status.equals("pass")) {
g2D.setColor(Color.green);
int x1[] = {
610,
1057,
1017,
520
};
int y1[] = {
120,
350,
485,
220
};
g2D.fillPolygon(x1, y1, 4);
} else if (wpl2_status.equals("fail")) {
g2D.setColor(Color.red);
int x1[] = {
610,
1057,
1017,
520
};
int y1[] = {
120,
350,
485,
220
};
g2D.fillPolygon(x1, y1, 4);
}
}
}
}
}
答案 0 :(得分：0)
解决此类问题的通用方法是模型视图控制器或模型视图演示者范式。
我在您的代码中看到的是
class Gradient extends JPanel {
private String wpl_test = "";
private String wpl1_status = "";
private String wpl2_status = "";
...
即这些值直接在您的视图中。
通常最好将数据（模型）和视图（JLabel等）和逻辑（控制器/演示者）分开。
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
public class Model {
public static final String KEY_WPL_TEST = "wpl_test";
public static final String KEY_WPL1_STATUS = "wpl1_status";
public static final String KEY_WPL2_STATUS = "wpl2_status";
private String wpl_test = "";
private String wpl1_status = "";
private String wpl2_status = "";
private final PropertyChangeSupport pcs = new PropertyChangeSupport(this);
/**
* The default constructor.
*/
public Model() {
super();
}
public String getWpl_test() {
return wpl_test;
}
public void setWpl_test(String wpl_test) {
PropertyChangeEvent event = new PropertyChangeEvent(this, KEY_WPL_TEST, this.wpl_test, wpl_test);
this.wpl_test = wpl_test;
pcs.firePropertyChange(event);
}
public String getWpl1_status() {
return wpl1_status;
}
public void setWpl1_status(String wpl1_status) {
PropertyChangeEvent event = new PropertyChangeEvent(this, KEY_WPL1_STATUS, this.wpl1_status, wpl1_status);
this.wpl1_status = wpl1_status;
pcs.firePropertyChange(event);
}
public String getWpl2_status() {
return wpl2_status;
}
public void setWpl2_status(String wpl2_status) {
PropertyChangeEvent event = new PropertyChangeEvent(this, KEY_WPL2_STATUS, this.wpl2_status, wpl2_status);
this.wpl2_status = wpl2_status;
pcs.firePropertyChange(event);
}
public void addPropertyChangeListener(PropertyChangeListener listener) {
pcs.addPropertyChangeListener(listener);
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
pcs.removePropertyChangeListener(listener);
}
public void addPropertyChangeListener(String propertyName, PropertyChangeListener listener) {
pcs.addPropertyChangeListener(propertyName, listener);
}
public void removePropertyChangeListener(String propertyName, PropertyChangeListener listener) {
pcs.removePropertyChangeListener(propertyName, listener);
}
}
然后，查看
import java.awt.BorderLayout;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class View extends JPanel {
private final JLabel jlWpl1_status;
private final JLabel jlWpl2_status;
private final JLabel jlWpl_test;
private final JButton jbUpdate;
/**
* The default constructor.
*/
public View() {
super();
jlWpl1_status = new JLabel();
jlWpl2_status = new JLabel();
jlWpl_test = new JLabel();
jbUpdate = new JButton("push me");
// arrange the view
this.setLayout(new BorderLayout());
this.add(jlWpl1_status, BorderLayout.EAST);
this.add(jlWpl_test, BorderLayout.CENTER);
this.add(jlWpl2_status, BorderLayout.WEST);
this.add(jbUpdate, BorderLayout.SOUTH);
}
public void display(Model model) {
jlWpl1_status.setText(model.getWpl1_status());
jlWpl2_status.setText(model.getWpl2_status());
jlWpl_test.setText(model.getWpl_test());
}
public JButton getJbUpdate() {
return jbUpdate;
}
}
最后是控制器或演示者，例如
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
public class Controller implements PropertyChangeListener {
/**
* The Constant WHAT.
*/
public static final String WHAT = "$Id$";
private final Model model;
private View view;
/**
* The default constructor.
*/
public Controller(Model model, View view) {
super();
this.model = model;
this.model.addPropertyChangeListener(this);
this.view = view;
this.view.display(model);
this.view.getJbUpdate().addActionListener(x -> {
model.setWpl_test("button pressed");
});
}
@Override
public void propertyChange(PropertyChangeEvent evt) {
view.display(model);
}
}
现在，如果有主要方法/应用程序
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class Application {
/**
* The default constructor.
*/
public Application() {
super();
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
View view = new View();
Model model = new Model();
frame.add(view);
frame.setSize(200, 200);
new Controller(model, view);
new Thread(() -> {
try {
Thread.sleep(5000L);
SwingUtilities.invokeLater(() -> {
model.setWpl1_status("somewpl1status");
model.setWpl2_status("somewpl2status");
model.setWpl_test("sometest");
});
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}).start();
frame.setVisible(true);
}
}
无论您是通过线程调用还是通过按钮调用，只要调用模型的任何设置器，值都会自动更新。