请各位好心的JAVA高手进来下.

Question

小弟正在做一项JAVA作业,是用GUI设计一个点菜系统.已经构思好了,程序也写了一半了.但是现在遇到了瓶颈,过不去了.其实具体方法也知道怎么用,但因为是初学者,没有这方面设计经验.代码看对于高手看起来可能有点简单,但是我想了3 4 个小时想不通.所以上来赐教.请各位高手帮帮小弟.请留下QQ,我会联系你的.我的 86668123

Answer 1

那好,我贴出问题.
首先,这一个用JAVA写的GUI.我贴出代码,大家运行一下,看看是不是出错(当你点第二份的时候).import javax.swing.*; 
import javax.swing.border.*; 
import java.awt.*; 
import java.awt.event.*; 
     
     
     
public class Pizza extends JFrame implements ItemListener, ActionListener{    private final int PTTITLES = 7,LTITLES = 7,MTITLES = 7,STITLES = 7;
   private JPanel mainPanel = new JPanel(),
            centerPanel = new JPanel(),
            buttonPanel = new JPanel(),
            pizzaTypePanel = new JPanel(),                         
            largePanel = new JPanel(),                          
            mediumPanel = new JPanel(),                           
            smallPanel = new JPanel(),
            ddPanel = new JPanel(); 
   private JButton clear = new JButton("clear"); 
   private JButton submit = new JButton("submit");
   private JTextArea display = new JTextArea(10,20);
   String s;
   JCheckBox titlesp[] = new JCheckBox[PTTITLES];   
   JCheckBox titlesl[] = new JCheckBox[LTITLES];
   JCheckBox titlesm[] = new JCheckBox[MTITLES];
   JCheckBox titless[] = new JCheckBox[STITLES];
   JTabbedPane jTabbedPane = new JTabbedPane();   
        
            
    public Pizza() { 
      pizzaTypePanel.setLayout(new GridLayout(7, 1));
      largePanel.setLayout(new GridLayout(7, 1));
      mediumPanel.setLayout(new GridLayout(7, 1));
      smallPanel.setLayout(new GridLayout(7, 1));
      pizzaTypePanel.setBorder(BorderFactory.createTitledBorder("Pizza Type"));
      largePanel.setBorder(BorderFactory.createTitledBorder("Large"));
      mediumPanel.setBorder(BorderFactory.createTitledBorder("Medium"));
      smallPanel.setBorder(BorderFactory.createTitledBorder("Small"));
      centerPanel.add(pizzaTypePanel); 
      centerPanel.add(largePanel);
      centerPanel.add(mediumPanel); 
      centerPanel.add(smallPanel);
      centerPanel.setLayout(new FlowLayout());
      pack();
      getContentPane().add(mainPanel);
      pizzaType();
      largemoney();
      mediummoney();
      smallmoney();
      buttonPanel.add(clear); 
      buttonPanel.add(submit); 
      mainPanel.add(jTabbedPane);
      mainPanel.add(display);
      clear.addActionListener(this);                                       
      submit.addActionListener(this);
      mainPanel.add(buttonPanel);
      mainPanel.setLayout(new GridLayout(3, 1)); 
      jTabbedPane.addTab("Pizza Type", null, centerPanel, null);
  jTabbedPane.addTab("声明", null, ddPanel, null);
  
}         
            
    public void pizzaType() { 
      
   String titleLabelsPT[] = 
     {"Super Special", "Marinara", 
        "Vegetarian","Hawaiian","Meat Lovers","Chicken","Extra Topping"}; 
                                                                  
        for(int k = 0; k < titleLabelsPT.length; k++) {                   
      titlesp[k] = new JCheckBox(titleLabelsPT[k]); 
      titlesp[k].addItemListener(this); 
      pizzaTypePanel.add(titlesp[k]);                     
}}    public void largemoney() { 
      
   String titleLabelsLM[] = 
     {"8.00", "8.00", 
        "8.00","8.00","8.00","8.00","8.00"}; 
                                                                  
        for(int k = 0; k < titleLabelsLM.length; k++) {                   
      titlesl[k] = new JCheckBox(titleLabelsLM[k]); 
      titlesl[k].addItemListener(this); 
      largePanel.add(titlesl[k]);                     
}} public void mediummoney() { 
      
   String titleLabelsMM[] = 
     {"6.50", "6.50", 
        "6.50","6.50","6.50","6.50","6.50"}; 
                                                                  
        for(int k = 0; k < titleLabelsMM.length; k++) {                   
      titlesm[k] = new JCheckBox(titleLabelsMM[k]); 
      titlesm[k].addItemListener(this); 
      mediumPanel.add(titlesm[k]);                     
}} public void smallmoney() { 
      
   String titleLabelsSM[] = 
     {"5.00", "5.00", 
        "5.00","5.00","5.00","5.00","5.00"}; 
                                                                  
        for(int k = 0; k < titleLabelsSM.length; k++) {                   
      titless[k] = new JCheckBox(titleLabelsSM[k]); 
      titless[k].addItemListener(this); 
      smallPanel.add(titless[k]);                     
}}
public void itemStateChanged(ItemEvent e) { 
         display.setText("Your order so far  ");
         for (int k = 0; k < titlesp.length; k++ )                 
           if (titlesp[k].isSelected())  
                               
             display.append( titlesp[k].getText() + "\n"); 
             
         for (int k = 0; k < titlesl.length; k++ ) 
           if (titlesl[k].isSelected()) 
             display.append(" Large (" + titlesl[k].getText() + ")"); 
         for (int k = 0; k < titlesm.length; k++ ) 
           if (titlesm[k].isSelected()) 
             display.append(" Medium (" + titlesm[k].getText() + ")");
         for (int k = 0; k < titless.length; k++ ) 
           if (titless[k].isSelected()) 
             display.append(" Small (" + titless[k].getText() + ")");
         
      }
      
public void actionPerformed(ActionEvent e){ 
   String label = submit.getText(); 
   if (e.getSource() == submit) { 
      if (label.equals("Submit Order")) { 
         display.append("Thank you. Press 'Confirm' to submit for your order!\n"); 
         submit.setText("Confirm Order"); 
      } else { 
         display.append("Thank you. You will receive your order tomorrow!\n"); 
         submit.setText("Submit Order"); 
      } 
   } else 
      display.setText("Thank you. Maybe we can serve you next time!\n"); 
} 
      
public static void main(String[] args)      { 
     Pizza f = new Pizza(); 
       f.setSize(600, 750); 
       
       f.setVisible(true); 
                                                                             
  } }

Answer 2

我想用一个方法,就是说第一个点完.在点第二个的时候,append的所有的文本下面加,这个点完一个是一个,不会出现乱了的那种情况了.但是不知道怎么加...

Answer 3

好象今天我不大好运行,我在别人的机子上呢....我只能用眼睛看了
顺便告诉你帖代码可以用JAVA格式的
import javax.swing.*;  
import javax.swing.border.*;  
import java.awt.*;  
import java.awt.event.*;  
      
      
      
public class Pizza extends JFrame implements ItemListener, ActionListener{     private final int PTTITLES = 7,LTITLES = 7,MTITLES = 7,STITLES = 7; 
   private JPanel mainPanel = new JPanel(), 
            centerPanel = new JPanel(), 
            buttonPanel = new JPanel(), 
            pizzaTypePanel = new JPanel(),                          
            largePanel = new JPanel(),                           
            mediumPanel = new JPanel(),                            
            smallPanel = new JPanel(), 
            ddPanel = new JPanel();  
   private JButton clear = new JButton("clear");  
   private JButton submit = new JButton("submit"); 
   private JTextArea display = new JTextArea(10,20); 
   String s; 
   JCheckBox titlesp[] = new JCheckBox[PTTITLES];    
   JCheckBox titlesl[] = new JCheckBox[LTITLES]; 
   JCheckBox titlesm[] = new JCheckBox[MTITLES]; 
   JCheckBox titless[] = new JCheckBox[STITLES]; 
   JTabbedPane jTabbedPane = new JTabbedPane();    
         
             
    public Pizza() {  
      pizzaTypePanel.setLayout(new GridLayout(7, 1)); 
      largePanel.setLayout(new GridLayout(7, 1)); 
      mediumPanel.setLayout(new GridLayout(7, 1)); 
      smallPanel.setLayout(new GridLayout(7, 1)); 
      pizzaTypePanel.setBorder(BorderFactory.createTitledBorder("Pizza Type")); 
      largePanel.setBorder(BorderFactory.createTitledBorder("Large")); 
      mediumPanel.setBorder(BorderFactory.createTitledBorder("Medium")); 
      smallPanel.setBorder(BorderFactory.createTitledBorder("Small")); 
      centerPanel.add(pizzaTypePanel);  
      centerPanel.add(largePanel); 
      centerPanel.add(mediumPanel);  
      centerPanel.add(smallPanel); 
      centerPanel.setLayout(new FlowLayout()); 
      pack(); 
      getContentPane().add(mainPanel); 
      pizzaType(); 
      largemoney(); 
      mediummoney(); 
      smallmoney(); 
      buttonPanel.add(clear);  
      buttonPanel.add(submit);  
      mainPanel.add(jTabbedPane); 
      mainPanel.add(display); 
      clear.addActionListener(this);                                        
      submit.addActionListener(this); 
      mainPanel.add(buttonPanel); 
      mainPanel.setLayout(new GridLayout(3, 1));  
      jTabbedPane.addTab("Pizza Type", null, centerPanel, null); 
  jTabbedPane.addTab("声明", null, ddPanel, null); 
   
}          
             
    public void pizzaType() {  
       
   String titleLabelsPT[] =  
     {"Super Special", "Marinara",  
        "Vegetarian","Hawaiian","Meat Lovers","Chicken","Extra Topping"};  
                                                                   
        for(int k = 0; k  < titleLabelsPT.length; k++) {                    
      titlesp[k] = new JCheckBox(titleLabelsPT[k]);  
      titlesp[k].addItemListener(this);  
      pizzaTypePanel.add(titlesp[k]);                      
}}     public void largemoney() {  
       
   String titleLabelsLM[] =  
     {"8.00", "8.00",  
        "8.00","8.00","8.00","8.00","8.00"};  
                                                                   
        for(int k = 0; k  < titleLabelsLM.length; k++) {                    
      titlesl[k] = new JCheckBox(titleLabelsLM[k]);  
      titlesl[k].addItemListener(this);  
      largePanel.add(titlesl[k]);                      
}}  public void mediummoney() {  
       
   String titleLabelsMM[] =  
     {"6.50", "6.50",  
        "6.50","6.50","6.50","6.50","6.50"};  
                                                                   
        for(int k = 0; k  < titleLabelsMM.length; k++) {                    
      titlesm[k] = new JCheckBox(titleLabelsMM[k]);  
      titlesm[k].addItemListener(this);  
      mediumPanel.add(titlesm[k]);                      
}}  public void smallmoney() {  
       
   String titleLabelsSM[] =  
     {"5.00", "5.00",  
        "5.00","5.00","5.00","5.00","5.00"};  
                                                                   
        for(int k = 0; k  < titleLabelsSM.length; k++) {                    
      titless[k] = new JCheckBox(titleLabelsSM[k]);  
      titless[k].addItemListener(this);  
      smallPanel.add(titless[k]);                      
}} 
public void itemStateChanged(ItemEvent e) {  
         display.setText("Your order so far  "); 
         for (int k = 0; k  < titlesp.length; k++ )                  
           if (titlesp[k].isSelected())   
                                
             display.append( titlesp[k].getText() + "\n");  
              
         for (int k = 0; k  < titlesl.length; k++ )  
           if (titlesl[k].isSelected())  
             display.append(" Large (" + titlesl[k].getText() + ")");  
         for (int k = 0; k  < titlesm.length; k++ )  
           if (titlesm[k].isSelected())  
             display.append(" Medium (" + titlesm[k].getText() + ")"); 
         for (int k = 0; k  < titless.length; k++ )  
           if (titless[k].isSelected())  
             display.append(" Small (" + titless[k].getText() + ")"); 
          
      } 
       
public void actionPerformed(ActionEvent e){  
   String label = submit.getText();  
   if (e.getSource() == submit) {  
      if (label.equals("Submit Order")) {  
         display.append("Thank you. Press 'Confirm' to submit for your order!\n");  
         submit.setText("Confirm Order");  
      } else {  
         display.append("Thank you. You will receive your order tomorrow!\n");  
         submit.setText("Submit Order");  
      }  
   } else  
      display.setText("Thank you. Maybe we can serve you next time!\n");  
}  
       
public static void main(String[] args)      {  
     Pizza f = new Pizza();  
       f.setSize(600, 750);  
        
       f.setVisible(true);  
                                                                              
  }  }
自己帖出来自己看看先

Answer 4

答:
将方法public void itemStateChanged(ItemEvent e)的代码改成如下代码,就行了.public void itemStateChanged(ItemEvent e) {  
         display.setText("Your order so far  "); 
         for (int k = 0; k  < titlesp.length; k++ )                  
           if (titlesp[k].isSelected())   
                                
             display.append( titlesp[k].getText() + "\n");  
              
         for (int k = 0; k  < titlesl.length; k++ )  
           if (titlesl[k].isSelected())  
             display.append(" Large (" + titlesl[k].getText() + ")");  
         for (int k = 0; k  < titlesm.length; k++ )  
           if (titlesm[k].isSelected())  
             display.append(" Medium (" + titlesm[k].getText() + ")"); 
         for (int k = 0; k  < titless.length; k++ )  
           if (titless[k].isSelected())  
             display.append(" Small (" + titless[k].getText() + ")"); 
          
      } 

Answer 5

答:对不起,上贴贴错了. 
将方法public void itemStateChanged(ItemEvent e)的代码改成如下代码,就行了. public void itemStateChanged(ItemEvent e) {  
         display.setText("Your order so far \n "); 
         for (int k = 0; k  < titlesp.length; k++ )  
         {
           if (titlesp[k].isSelected())   
                                
             display.append( titlesp[k].getText() );  
              
   
           if (titlesl[k].isSelected())  
             display.append(" Large (" + titlesl[k].getText() + ")");  
     
           if (titlesm[k].isSelected())  
             display.append(" Medium (" + titlesm[k].getText() + ")"); 
     
           if (titless[k].isSelected())  
             display.append(" Small (" + titless[k].getText() + ")"); 
          display.append("\n");
      } 
}

Answer 6

同上，for (int k = 0; k  < titlesp.length; k++ )                  
           if (titlesp[k].isSelected())   
                                
             display.append( titlesp[k].getText() + "\n");  
              
         for (int k = 0; k  < titlesl.length; k++ )  
           if (titlesl[k].isSelected())  
             display.append(" Large (" + titlesl[k].getText() + ")");  
         for (int k = 0; k  < titlesm.length; k++ )  
           if (titlesm[k].isSelected())  
             display.append(" Medium (" + titlesm[k].getText() + ")"); 
         for (int k = 0; k  < titless.length; k++ )  
           if (titless[k].isSelected())  
             display.append(" Small (" + titless[k].getText() + ")"); 
你用了四个for语句

Answer 7

请问选了一个之后,我能不能用gettext的方法拿到display里面的内容?我拿到了,在追加.titlesp[k].getText()这个能不能用个字符串代替?