JavaのJProgressbarが更新されない、不明なソースエラー

Question

私は自分自身でJavaでプログラムすることを学んでいますが、ヘルスバーを作成しようとしていますが、健康状態は表示されますが、シンプルな2dゲームのスケルトンを作っていて、そのボタンはコマンドを知るだけです）、健康は落ちません。私はこれが私のCMDに現れる3回ボタンを押すと：

ここに私のコードです：

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 

public class test{ 

    private static JFrame frame = new JFrame("test"); 

    private static JPanel panel = new JPanel(); 
    private static JPanel panel1 = new JPanel(); 
    private static JPanel panel2 = new JPanel(); 

    private static JButton button1 = new JButton("UP"); 
    private static JButton button2 = new JButton("DN"); 
    private static JButton button3 = new JButton("L"); 
    private static JButton button4 = new JButton("R"); 

    private static JLabel background = new JLabel(new ImageIcon("C:\\Users\\beau\\Downloads\\background.jpg")); 

    private static int startHealth = 20; 
    private static int healthBoost = 0; 
    private static int maxHealth = startHealth + healthBoost; 
    private static int damage = 0; 
    private static int damageTaken; 
    private static int curentHealth; 


    public static void main(String[] args){ 
     //JFrame Properties 
     frame.setSize(900,600); 
     frame.setLocationRelativeTo(null); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.setResizable(false); 
     frame.setVisible(true); 


     //shown stuff Properties and Adding 
     damageTaken += damage; 
     curentHealth = maxHealth - damageTaken; 

     JProgressBar health = new JProgressBar(0,curentHealth); 
     health.setStringPainted(true); 
     health.setString(curentHealth + "/" + maxHealth); 
     health.setValue(curentHealth); 

     frame.add(background); 

     panel.setLayout(null); 
     background.setLayout(null); 

     button1.setBounds(61,420,50,50); 
     button2.setBounds(61,520,50,50); 
     button3.setBounds(11,470,50,50); 
     button4.setBounds(111,470,50,50); 
     panel.setBounds(725,0,175,600); 
     health.setBounds(10,20,150,20); 

     panel.add(button1); 
     panel.add(button2); 
     panel.add(button3); 
     panel.add(button4); 
     panel.add(health); 
     background.add(panel); 


     button1.addActionListener (new Action1()); 


     background.revalidate(); 
    } 

    static class Action1 implements ActionListener{ 
     public void actionPerformed (ActionEvent e){ 
      damage = 5; 
      main(new String[] {"a","b","c"}); 
     } 
    } 
    static class Action2 implements ActionListener{ 
     public void actionPerformed (ActionEvent e){ 

     } 
    } 
    static class ActionReset implements ActionListener{ 
     public void actionPerformed (ActionEvent e){ 

     } 
    } 
} 
    import javax.swing.*; 
    import java.awt.*; 
    import java.awt.event.*; 

    public class test{ 

    private static JFrame frame = new JFrame("test"); 

    private static JPanel panel = new JPanel(); 
    private static JPanel panel1 = new JPanel(); 
    private static JPanel panel2 = new JPanel(); 

    private static JButton button1 = new JButton("UP"); 
    private static JButton button2 = new JButton("DN"); 
    private static JButton button3 = new JButton("L"); 
    private static JButton button4 = new JButton("R"); 

    private static JLabel background = new JLabel(new ImageIcon("C:\\Users\\beau\\Downloads\\background.jpg")); 

    private static int startHealth = 20; 
    private static int healthBoost = 0; 
    private static int maxHealth = startHealth + healthBoost; 
    private static int damage = 0; 
    private static int damageTaken; 
    private static int curentHealth; 


    public static void main(String[] args){ 
     //JFrame Properties 
     frame.setSize(900,600); 
     frame.setLocationRelativeTo(null); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.setResizable(false); 
     frame.setVisible(true); 


     //shown stuff Properties and Adding 
     damageTaken += damage; 
     curentHealth = maxHealth - damageTaken; 

     JProgressBar health = new JProgressBar(0,curentHealth); 
     health.setStringPainted(true); 
     health.setString(curentHealth + "/" + maxHealth); 
     health.setValue(curentHealth); 

     frame.add(background); 

     panel.setLayout(null); 
     background.setLayout(null); 

     button1.setBounds(61,420,50,50); 
     button2.setBounds(61,520,50,50); 
     button3.setBounds(11,470,50,50); 
     button4.setBounds(111,470,50,50); 
     panel.setBounds(725,0,175,600); 
     health.setBounds(10,20,150,20); 

     panel.add(button1); 
     panel.add(button2); 
     panel.add(button3); 
     panel.add(button4); 
     panel.add(health); 
     background.add(panel); 


     button1.addActionListener (new Action1()); 


     background.revalidate(); 
    } 

    static class Action1 implements ActionListener{ 
     public void actionPerformed (ActionEvent e){ 
      damage = 5; 
      main(new String[] {"a","b","c"}); 
     } 
    } 
    static class Action2 implements ActionListener{ 
     public void actionPerformed (ActionEvent e){ 

     } 
    } 
    static class ActionReset implements ActionListener{ 
     public void actionPerformed (ActionEvent e){ 

     } 
    } 
} 

私はstackoverflow.comにGoogleとたくさんで検索が、i」はdidnの私の問題のように見える問題を見つけることはできません。誰かがこの問題で私を助けてくれますか？

Answer 1

最大値が最小値、下位である場合は、これらの例外を取得：

new JProgressBar(0,-5); 

は、このコードを参照してください：

/** 
    * Initializes value, extent, minimum and maximum. Adjusting is false. 
    * Throws an <code>IllegalArgumentException</code> if the following 
    * constraints aren't satisfied: 
    * <pre> 
    * min &lt;= value &lt;= value+extent &lt;= max 
    * </pre> 
    */ 
    public DefaultBoundedRangeModel(int value, int extent, int min, int max) 
    { 
     if ((max >= min) && 
      (value >= min) && 
      ((value + extent) >= value) && 
      ((value + extent) <= max)) { 
      this.value = value; 
      this.extent = extent; 
      this.min = min; 
      this.max = max; 
     } 
     else { 
      throw new IllegalArgumentException("invalid range properties"); 
     } 
    }