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java - 强制在线程内进行 GUI 更新 - JSlider 更新

In lại 作者：行者123 更新时间：2023-12-02 06:29:22 31 4
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我试图通过使用随机数在循环中设置 JSlider 位置来模拟“赛马”的投注结果。我的问题是，当然，我无法在线程执行时更新 GUI，因此我的 JSlider 似乎没有在竞赛，它们从头到尾都在运行。我尝试过使用代码并将它们分成不同的方法，但我无法解决单线程 Swing 问题。有没有办法强制更新或停止线程更新GUI并重新启动进程，直到满足条件？ 

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JApplet;
import javax.swing.JOptionPane;



public class HorseMain extends JApplet {



/**
 * Initializes the applet MainInterface
 */
@Ghi đè
public void init() {
           thử {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                phá vỡ;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(MainInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(MainInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(MainInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(MainInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //

    /* Create and display the applet */
    thử {
        java.awt.EventQueue.invokeAndWait(new Runnable() {
            công khai void run() {
                initComponents();
            }
        });
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}


 @SuppressWarnings("unchecked")

   private void initComponents() {


    jPanel1 = new javax.swing.JPanel();
    jSlider1 = new javax.swing.JSlider(1,400,1);
    jSlider2 = new javax.swing.JSlider(1,400,1);
    jSlider3 = new javax.swing.JSlider(1,400,1);
    jSlider4 = new javax.swing.JSlider(1,400,1);
    jSlider5 = new javax.swing.JSlider(1,400,1);
    jSlider6 = new javax.swing.JSlider(1,400,1);
    jPanel2 = new javax.swing.JPanel();
    jCheckBox1 = new javax.swing.JCheckBox();
    jCheckBox2 = new javax.swing.JCheckBox();
    jCheckBox3 = new javax.swing.JCheckBox();
    jComboBox1 = new javax.swing.JComboBox();
    jTextField1 = new javax.swing.JTextField();
    jLabel2 = new javax.swing.JLabel();
    jPanel3 = new javax.swing.JPanel();
    jPanel4 = new javax.swing.JPanel();
    jTextField2 = new javax.swing.JTextField();
    jButton1 = new javax.swing.JButton();
    jTextField3 = new javax.swing.JTextField();
    jLabel1 = new javax.swing.JLabel();



    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
    jPanel1.setLayout(jPanel1Layout);
    jPanel1Layout.setHorizontalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jSlider1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addComponent(jSlider2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addComponent(jSlider3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addComponent(jSlider4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addComponent(jSlider5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addComponent(jSlider6, javax.swing.GroupLayout.Alignment.TRAILING,javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
    );
    jPanel1Layout.setVerticalGroup(
        jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel1Layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(jSlider1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jSlider2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jSlider3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jSlider4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jSlider5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jSlider6, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
    );

    jCheckBox1.setText("Win");

    jCheckBox2.setText("Place");

    jCheckBox3.setText("Show");

    jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Horse 1", "Horse 2",
    "Horse 3", "Horse 4", "Horse 5", "Horse 6"}));

    jTextField1.setText("1");

    jLabel2.setText("Bet Amount:");

    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
    jPanel2.setLayout(jPanel2Layout);
    jPanel2Layout.setHorizontalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel2Layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jComboBox1, 0, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(jPanel2Layout.createSequentialGroup()
                    .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jCheckBox3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jCheckBox2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jCheckBox1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                            .addComponent(jLabel2, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jTextField1, javax.swing.GroupLayout.Alignment.LEADING)))
                    .addGap(0, 0, Short.MAX_VALUE)))
            .addContainerGap())
    );
    jPanel2Layout.setVerticalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel2Layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(10, 10, 10)
            .addComponent(jCheckBox1)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(jCheckBox2)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jCheckBox3)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(jLabel2)
            .addGap(5, 5, 5)
            .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );

    javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
    jPanel3.setLayout(jPanel3Layout);
    jPanel3Layout.setHorizontalGroup(
        jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 127, Short.MAX_VALUE)
    );
    jPanel3Layout.setVerticalGroup(
        jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 65, Short.MAX_VALUE)
    );

    jTextField2.setText("Winnings");

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

    jTextField3.setText("500");

    jLabel1.setText("Bank:");

    javax.swing.GroupLayout jPanel4Layout = new javax.swing.GroupLayout(jPanel4);
    jPanel4.setLayout(jPanel4Layout);
    jPanel4Layout.setHorizontalGroup(
        jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel4Layout.createSequentialGroup()
            .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel4Layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jTextField3))
                .addGroup(jPanel4Layout.createSequentialGroup()
                    .addGap(22, 22, 22)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 46, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(0, 47, Short.MAX_VALUE)))
            .addGap(160, 160, 160)
            .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(23, 23, 23))
    );
    jPanel4Layout.setVerticalGroup(
        jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel4Layout.createSequentialGroup()
            .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                .addGroup(jPanel4Layout.createSequentialGroup()
                    .addGap(37, 37, 37)
                    .addGroup(jPanel4Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(jLabel1))
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 14, Short.MAX_VALUE)
                    .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(jPanel4Layout.createSequentialGroup()
                    .addContainerGap()
                    .addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
            .addContainerGap())
    );

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addComponent(jPanel4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jPanel4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );

}
 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         


  if (evt.getSource() == jButton1)
  { 
      while (END!=1)
      {
          END=race();
          bộ đếm thời gian();
      }             

  }  




}
public void timer()
  {
      for(int i=0; i<6; i++)
      {            
       thử {
            Thread.sleep(250L);
    } bắt (InterruptedException e) {
             e.printStackTrace();
             } 


      }                  
          }
public int race()
{ int end=0;
    boolean racing=true;      

   stride1 = horse1.trot();
   pos1+= stride1;
   jSlider1.setValue(pos1);
   stride2 = horse2.trot();
   pos2+= stride2;
   jSlider2.setValue(pos2);
   stride3 = horse3.trot();
   pos3+= stride3;
   jSlider3.setValue(pos3);
   stride4 = horse1.trot();
   pos4+= stride4;
   jSlider4.setValue(pos4);
   stride5 = horse5.trot();
   pos5+=stride5;
   jSlider5.setValue(pos5);
   stride6 = horse6.trot();
   pos6+=stride5;
   jSlider6.setValue(pos6);
   System.out.println(stride1);
   System.out.println(stride2);
   System.out.println(stride3);
   System.out.println(stride4);
   System.out.println(stride5);
   System.out.println(stride6);
   System.out.println(pos1);
   System.out.println(pos2);
  if (pos1>=400 || pos2>=400 || pos3>=400 || pos4>=400 || pos5>=400 || pos6>=400)
  end = 1;    

    return end;
}
private javax.swing.JButton jButton1;
private javax.swing.JCheckBox jCheckBox1;
private javax.swing.JCheckBox jCheckBox2;
private javax.swing.JCheckBox jCheckBox3;
private javax.swing.JComboBox jComboBox1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPanel jPanel4;
private javax.swing.JSlider jSlider1;
private javax.swing.JSlider jSlider2;
private javax.swing.JSlider jSlider3;
private javax.swing.JSlider jSlider4;
private javax.swing.JSlider jSlider5;
private javax.swing.JSlider jSlider6;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
   int stride1=0;
   int stride2=0;
   int stride3=0;
   int stride4=0;
   int stride5=0;
   int stride6=0;
   int pos1=0;
   int pos2=0;
   int pos3=0;
   int pos4=0;
   int pos5=0;
   int pos6=0;               
   Horse horse1 = new Horse();
   Horse horse2 = new Horse();
   Horse horse3 = new Horse();
   Horse horse4 = new Horse();
   Horse horse5 = new Horse();
   Horse horse6 = new Horse();
   private int END=0;

1 Câu trả lời

这是您的问题:

public void timer() {
    for(int i=0; i<6; i++) {
        thử {
            Thread.sleep(250L);
        } bắt (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

此代码正在执行并阻止 Event Dispatching Thread (又名 EDT)在此调用中:Thread.sleep(250L)。 EDT 是一个单独的特殊线程，Swing 组件在其中进行创建和更新。如果您在 EDT 中运行繁重的任务，那么您的 GUI 将卡住，Swing 组件将无法工作(甚至无法显示)。

查看 Concurrency in Swing跟踪了解 Swing 中的并发性。

Bạn có thể sử dụng Swing Timer以固定的时间速率进行定期更新。例如这样的事情:

final JSlider horse1 = new JSlider(0, 100, 0);
final JSlider horse2 = new JSlider(0, 100, 0);
final JSlider horse3 = new JSlider(0, 100, 0);

Timer timer = new Timer(100, new ActionListener() {
    @Ghi đè
    public void actionPerformed(ActionEvent e) {
        Random random = new Random();

        int horse1Value = horse1.getValue();
        horse1Value += random.nextInt(101 - horse1Value);
        horse1.setValue(horse1Value);

        int horse2Value = horse2.getValue();
        horse2Value += random.nextInt(101 - horse2Value);
        horse2.setValue(horse2Value);

        int horse3Value = horse3.getValue();
        horse3Value += random.nextInt(101 - horse3Value);
        horse3.setValue(horse3Value);

        if(horse1Value == 100 && horse2Value == 100 && horse3Value == 100) {
            System.out.println("Race finished!");
            Timer timer = (Timer)e.getSource();
            timer.stop();
        }
    }
});
timer.setRepeats(true);
timer.start();

关于java - 强制在线程内进行 GUI 更新 - JSlider 更新，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20219885/

31 4 0
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行者123
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