带有响应式 UI 的 Swing

Question

我有一个主类、一个 UI 类和一个接口处理从 UI 到主的回调：

主要：

package clascomms;

import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author stef
 */
public class ClassComms implements Handler{

    private final ClassCommsUi ui;
    
    public ClassComms() {
        // private final ClassCommsUi ui;
        ui = new ClassCommsUi(this,"Click1","Click2");
}
    
    @Override
    public void btn1Clicked(){
        try {
            // this code should run if button 1 is clicked
            Thread.sleep(5000);
        } catch (InterruptedException ex) {
            Logger.getLogger(ClassComms.class.getName()).log(Level.SEVERE, null, ex);
        }
        System.out.println("bt1Clicked");
    }
    @Override
     public void btn2Clicked(){
    // this code should run if button 2 is clicked
         System.out.println("bt2Clicked");
    }
    
     
    public static void main(String[] args) {
       ClassComms thisOne = new ClassComms();
    }
    
    
}

用户界面：

package clascomms;

/**
 *
 * @author stef
 */
public class ClassCommsUi extends javax.swing.JFrame {
    private Handler mainClass;
    public ClassCommsUi(Handler mainClass, String btn1, String btn2) {
        this.mainClass = mainClass;
        initComponents();
        jButton1.setText(btn1);
        jButton2.setText(btn2);
        this.setVisible(true);
    }

   
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setText("jButton1");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jButton2.setText("jButton2");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addComponent(jButton1)
                .addGap(27, 27, 27)
                .addComponent(jButton2)
                .addContainerGap(33, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton1)
                    .addComponent(jButton2))
                .addContainerGap(28, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        // If this action happens, method btn1Clicked() in main Class should be called 
    
      mainClass.btn1Clicked();
    }                                        

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        // If this action happens, method btn2Clicked() in main Class should be called 
        mainClass.btn2Clicked();
    }    
   
    public void quit(){}

    
   

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    // End of variables declaration                   
}

最后是接口：

package clascomms;

/**
 *
 * @author stef
 */
public interface Handler {
    public void btn1Clicked();
    public void btn2Clicked();
     
    
}

如您所见，主类中有一个 5 秒的 Thread.sleep()... 当我单击该按钮时，它将保持按下状态，直到睡眠结束 - UI 保持 100% 无响应。 是否有一种简单（此处为 NOOB...）的方式来让 UI 保持响应？

Answer 1

您正在阻塞 EDT（事件调度线程）。所有与 Swing 相关的代码都在 EDT 上运行，包括您的 actionPerformed。尝试在后台线程上休眠。

@Override
public void btn1Clicked(){
   new SwingWorker<Void, Void>() {

      @Override
      protected void doInBackground() throws Exception {
         try {
            Thread.sleep(5000);
         } catch (InterruptedException ex) {
            Logger.getLogger(ClassComms.class.getName()).log(Level.SEVERE, null, ex);
         }
         System.out.println("bt1Clicked");
      }
   }().execute();
}