Java/SwingでJLabelを使ってアニメーションを作成するには？

Question

私はJavaコースの最終プロジェクトを持っています。それはカエルジャンプゲームです。ここではそれを説明するビデオがある：

https://www.youtube.com/watch?v=NxWWP9cK24o

私は唯一のThread.sleepを知って、タイマーを使用する方法がわかりません。しかし、それは動作していません。

ここに私のコード：

import java.awt.event.ActionListener; 
import javax.swing.Timer; 




/* 
* To change this license header, choose License Headers in Project Properties. 
* To change this template file, choose Tools | Templates 
* and open the template in the editor. 
*/ 

/** 
* 
* @author gamekvnn 
*/ 
public class FrogGame extends javax.swing.JFrame { 
    /** 
    * Creates new form ba 
    */ 

    public FrogGame() { 
     initComponents(); 
    } 
     Timer time; 
    /** 
    * This method is called from within the constructor to initialize the form. 
    * WARNING: Do NOT modify this code. The content of this method is always 
    * regenerated by the Form Editor. 
    */ 
    @SuppressWarnings("unchecked") 
    // <editor-fold defaultstate="collapsed" desc="Generated Code">       
    private void initComponents() { 

     jPanel1 = new javax.swing.JPanel(); 
     frog1 = new javax.swing.JLabel(); 
     frog2 = new javax.swing.JLabel(); 
     frog3 = new javax.swing.JLabel(); 
     fr0g2 = new javax.swing.JLabel(); 
     fr0g1 = new javax.swing.JLabel(); 
     fr0g3 = new javax.swing.JLabel(); 
     jButton1 = new javax.swing.JButton(); 
     background = new javax.swing.JLabel(); 

     setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

     jPanel1.setLayout(null); 

     frog1.setIcon(new javax.swing.ImageIcon("/home/gamekvnn/NetBeansProjects/Project/src/frog1.png")); // NOI18N 
     jPanel1.add(frog1); 
     frog1.setBounds(10, 310, 80, 80); 

     frog2.setIcon(new javax.swing.ImageIcon("/home/gamekvnn/NetBeansProjects/Project/src/frog1.png")); // NOI18N 
     jPanel1.add(frog2); 
     frog2.setBounds(110, 310, 80, 80); 

     frog3.setIcon(new javax.swing.ImageIcon("/home/gamekvnn/NetBeansProjects/Project/src/frog1.png")); // NOI18N 
     jPanel1.add(frog3); 
     frog3.setBounds(210, 310, 80, 80); 

     fr0g2.setIcon(new javax.swing.ImageIcon("/home/gamekvnn/NetBeansProjects/Project/src/frog2.png")); // NOI18N 
     jPanel1.add(fr0g2); 
     fr0g2.setBounds(510, 310, 80, 80); 

     fr0g1.setIcon(new javax.swing.ImageIcon("/home/gamekvnn/NetBeansProjects/Project/src/frog2.png")); // NOI18N 
     jPanel1.add(fr0g1); 
     fr0g1.setBounds(610, 310, 80, 80); 

     fr0g3.setIcon(new javax.swing.ImageIcon("/home/gamekvnn/NetBeansProjects/Project/src/frog2.png")); // NOI18N 
     jPanel1.add(fr0g3); 
     fr0g3.setBounds(410, 310, 80, 80); 

     jButton1.setText("Start"); 
     jButton1.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       jButton1ActionPerformed(evt); 
      } 
     }); 
     jPanel1.add(jButton1); 
     jButton1.setBounds(520, 20, 100, 29); 

     background.setIcon(new javax.swing.ImageIcon("/home/gamekvnn/NetBeansProjects/Project/src/UZKEjzG.png")); // NOI18N 
     jPanel1.add(background); 
     background.setBounds(0, 0, 710, 440); 
     background.getAccessibleContext().setAccessibleName("background"); 

     javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
     getContentPane().setLayout(layout); 
     layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, 708, Short.MAX_VALUE) 
     ); 
     layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, 442, Short.MAX_VALUE) 
     ); 

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

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {           
     // TODO add your handling code here: 

     frog3.setLocation(frog3.getX()+100, frog3.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);;     //1000 milliseconds is one second. 
     } catch(InterruptedException ex) { 
      Thread.currentThread().interrupt(); 
     } 
     fr0g3.setLocation(fr0g3.getX()-200, fr0g3.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     fr0g2.setLocation(fr0g2.getX()-100, fr0g2.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     frog3.setLocation(frog3.getX()+200, frog3.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     frog2.setLocation(frog2.getX()+200, frog2.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     frog1.setLocation(frog1.getX()+100, frog1.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     fr0g3.setLocation(fr0g3.getX()-200, fr0g3.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     fr0g2.setLocation(fr0g2.getX()-200, fr0g2.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     fr0g1.setLocation(fr0g1.getX()-200, fr0g1.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     frog3.setLocation(frog3.getX()+100, frog3.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     frog2.setLocation(frog2.getX()+200, frog2.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     frog1.setLocation(frog1.getX()+200, frog1.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     fr0g2.setLocation(fr0g2.getX()-100, fr0g2.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     fr0g1.setLocation(fr0g1.getX()-200, frog1.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
     frog1.setLocation(frog1.getX()+100, frog1.getY()); 
     repaint(); 
     try { 
      Thread.sleep(100);; 
     } catch (InterruptedException ex) { 
      ex.printStackTrace(); 
     } 
    }           

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String args[]) { 
     /* Set the Nimbus look and feel */ 
     //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> 
     /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. 
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */ 
     try { 
      for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 
       if ("Nimbus".equals(info.getName())) { 
        javax.swing.UIManager.setLookAndFeel(info.getClassName()); 
        break; 
       } 
      } 
     } catch (ClassNotFoundException ex) { 
      java.util.logging.Logger.getLogger(FrogGame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (InstantiationException ex) { 
      java.util.logging.Logger.getLogger(FrogGame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (IllegalAccessException ex) { 
      java.util.logging.Logger.getLogger(FrogGame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
      java.util.logging.Logger.getLogger(FrogGame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } 
     //</editor-fold> 
     //</editor-fold> 

     /* Create and display the form */ 
     java.awt.EventQueue.invokeLater(new Runnable() { 
      public void run() { 
       new FrogGame().setVisible(true); 
      } 
     }); 
    } 

    // Variables declaration - do not modify      
    private javax.swing.JLabel background; 
    private javax.swing.JLabel fr0g1; 
    private javax.swing.JLabel fr0g2; 
    private javax.swing.JLabel fr0g3; 
    private javax.swing.JLabel frog1; 
    private javax.swing.JLabel frog2; 
    private javax.swing.JLabel frog3; 
    private javax.swing.JButton jButton1; 
    private javax.swing.JPanel jPanel1; 
    // End of variables declaration     
} 

Answer 1

、私はコードが再描画スレッドでEvent Dispatch Thread (EDT)上で実行されているため、動作しません

まあのThread.sleepのみを知っていますGUI。あなたがそれを眠ると言うことを続けるなら、決して自分自身を再描く機会を得ることはありません。

だから、もしあなたがThread.sleepを使いたいのであれば、別のスレッドを開始する必要があります。

詳細については、ConcurrencyのSwingチュートリアルのセクションをお読みください。ワーカースレッドのチュートリアルで説明したSwingWorkerを使用することもできます。