Question

我目前正在开发一个交互式用户界面，可以显示您是否打开了温室系统的水或照明组件。

当从另一个将标志值传递给线程类的窗口单击按钮时，使标签图标发生变化时，我遇到了相当大的挑战，这反过来会使图标发生变化

控制器 - ＆gt; ThreadLogic - ＆gt; NewSim

这是我在UI窗口中使用的一些示例测试代码我还是初学者，所以我使用的是eclipse中自动生成的代码

粘贴代码似乎有些问题

这是我用来修改标志值的测试代码段

ThreadLogic

while(!t.interrupted()){

            sim = new NewSim();
            try {
                sim.setLightStatus(1);
                System.out.println("flag is 1");
                t.sleep(5000);

                sim.setLightStatus(0);
                System.out.println("flag is 0");
                t.sleep(5000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }


    }

的 NewSim

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

import org.dyno.visual.swing.layouts.Constraints;
import org.dyno.visual.swing.layouts.GroupLayout;
import org.dyno.visual.swing.layouts.Leading;

//VS4E -- DO NOT REMOVE THIS LINE!
public class NewSim extends JFrame {

    private static final long serialVersionUID = 1L;
    protected JLabel water;
    protected JLabel light;
    Icon waterIcon = null;
    Icon lightIcon = null;  
    private int lightFlag = 0;
    private JPanel iconPane;
    private static final String PREFERRED_LOOK_AND_FEEL = "javax.swing.plaf.metal.MetalLookAndFeel";

    public NewSim() {
        initComponents();
    }

    private void initComponents() {
        setLayout(new GroupLayout());
        add(getIconPane(), new Constraints(new Leading(4, 313, 10, 10), new Leading(4, 232, 10, 10)));
        setSize(320, 240);
    }

    private JPanel getIconPane() {
        if (iconPane == null) {
            iconPane = new JPanel();
            iconPane.setLayout(new GroupLayout());
            iconPane.add(getWaterLabel(), new Constraints(new Leading(163, 10, 10), new Leading(79, 12, 12)));
            iconPane.add(getLightLabel(), new Constraints(new Leading(115, 12, 12), new Leading(79, 12, 12)));
        }
        return iconPane;
    }

    private JLabel getLightLabel() {
        if (light == null) {
            light = new JLabel();
            System.out.println(this.lightFlag);
            setLightStatus(0); 

        }
        return light;
    }

    private JLabel getWaterLabel() {
        if (water == null) {
            water = new JLabel();
            water.setIcon(new ImageIcon(getClass().getResource("/images/wateroff.png")));
        }
        return water;
    }
    public void setLightStatus(int lightFlag2) {
        // TODO Auto-generated method stub
        this.lightFlag = lightFlag2;
        switch(this.lightFlag){
            case 0: System.out.println("case 0");
                    light.setIcon(new ImageIcon(getClass().getResource("/images/lightoff.png")));
                    light.revalidate();
                    break;
            case 1: System.out.println("case 0");
                    light.setIcon(new ImageIcon(getClass().getResource("/images/lighton.png")));
                    light.revalidate();
                    break;
        }
    }
}

Answer 1

在Swing中，除了Event Dispatch Thread（EDT）之外，你不能在任何其他线程中创建或修改swing组件。

因此，应在EDT中执行以下行：

sim = new NewSim();
sim.setLightStatus(1);
sim.setLightStatus(0);

使用SwingUtilities.invokeLater（）在EDT中执行某些代码而不是当前（非EDT）线程。并阅读所有摆动组件的Javadoc中出现的警告：http://download.oracle.com/javase/6/docs/api/javax/swing/package-summary.html#threading

用线程交互在eclipse中更改标签图标

的 NewSim

1 个答案: