java swing ui 不显示重建的数组索引越界-6ren

java swing ui 不显示重建的数组索引越界

转载作者：行者123 更新时间：2023-12-01 12:58:09

好吧，我仍然是一个 Java 新手。说实话，这是一份家庭作业，但我现在正在用头撞墙。我不知道从这里该去哪里。

我正在为作业编写一个库存程序，它必须使用普通数组。不是 ArrayList

我感到困惑的部分是您必须向数组添加新条目的部分。我通过使用 Arrays.copyof 创建它的第二个版本，然后将其重新复制到具有增强长度的原始版本来实现。它似乎有效，通过控制台我可以毫无问题地打印我的新数组，并完成新条目。我遇到的问题是我的 gui 的问题。每次我尝试在我的 gui 中显示新条目时，我都会得到

"Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 5"

我确信我犯了一些愚蠢的错误，但我已经度过了漫长的一天，我完全被这个问题难住了。

package inventoryprogram3;
public class Inventoryprogram3 {


    public static void main(String[] args) {      
       inventoryGui gui = new inventoryGui();
        gui.setVisible(true);
    }
}
package inventoryprogram3;

import java.io.Serializable;

class sItem implements Serializable{
        int itemNumber;
        String itemName; 
        int itemStock;
        double itemPrice;
        double stockTotal;
 public sItem(int iNumber, String iName, int iStock, double iPrice){
        itemNumber = iNumber;
        itemName = iName;
        itemStock = iStock;
        itemPrice = iPrice;
 }
}

public class rBook extends sItem {
    int pCount;
    double rFee;
    public rBook(int iNumber, String iName, int iStock, double iPrice, int pageCount) {
        super(iNumber, iName, iStock, iPrice);
               pCount = pageCount;
               rFee = (iPrice * iStock) * 1.05;        
    }    
}


package inventoryprogram3;


import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.NumberFormat;
import java.util.Arrays;
import java.util.Locale;
import java.util.logging.Level;
import java.util.logging.Logger;


public class inventoryGui extends javax.swing.JFrame {

    /**
     * Creates new form inventoryGui
     */
   static int max = 5;
    static rBook[] rpg = new rBook[max];
    double invValue;
    int counter = -1;



    public inventoryGui() {
        initComponents();
        rpg[0] = new rBook(1, "Mutants & Masterminds", 4, 19.99, 200);
        rpg[1] = new rBook(2, "Exalted", 6, 25.99, 542);
        rpg[2] = new rBook(3, "D&D Next", 15, 49.95, 350);
        rpg[3] = new rBook(4, "Eclipse Phase", 3, 28.99, 426);
        rpg[4] = new rBook(5, "The Mutant Epoch", 8, 19.99, 386);
    }



    private void initComponents() {

        jLabel4 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        nameLabel = new javax.swing.JLabel();
        titleLabel = new javax.swing.JLabel();
        iNumberLabel = new javax.swing.JLabel();
        priceLabel = new javax.swing.JLabel();
        pCountlabel = new javax.swing.JLabel();
        stockLabel = new javax.swing.JLabel();
        restockLabel = new javax.swing.JLabel();
        entireInventoryLabel = new javax.swing.JLabel();
        restockField = new javax.swing.JTextField();
        stockField = new javax.swing.JTextField();
        pCountField = new javax.swing.JTextField();
        priceField = new javax.swing.JTextField();
        iNumberField = new javax.swing.JTextField();
        titleField = new javax.swing.JTextField();
        inventoryValueLabel = new javax.swing.JLabel();
        inventoryValueField = new javax.swing.JTextField();
        nextButton = new javax.swing.JButton();
        entireInventoryField = new javax.swing.JTextField();
        buttonLabel = new javax.swing.JLabel();
        previousButton = new javax.swing.JButton();
        companyLogo = new javax.swing.JLabel();
        saveButton = new javax.swing.JButton();
        loadButton = new javax.swing.JButton();
        addbutton = new javax.swing.JButton();
        deleteButton = new javax.swing.JButton();
        modifyButton = new javax.swing.JButton();
        searchButton = new javax.swing.JButton();

        jLabel4.setText("jLabel4");

        jLabel2.setText("jLabel2");

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("RPG Inventory Program v0.4");

        nameLabel.setText("Role Playing Game Inventory");

        titleLabel.setText("Title");

        iNumberLabel.setText("Item Number");

        priceLabel.setText("Price");

        pCountlabel.setText("Page Count");

        stockLabel.setText("Copies in Stock");

        restockLabel.setText("Restocking Fee");

        entireInventoryLabel.setText("Value of Entire Inventory");

        restockField.setEditable(false);

        iNumberField.setEditable(false);

        inventoryValueLabel.setText("Inventory Value");

        nextButton.setText("Next");
        nextButton.setToolTipText("Click toDisplay Next Item");
        nextButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                nextButtonActionPerformed(evt);
            }
        });

        entireInventoryField.setEditable(false);

        buttonLabel.setText("Item Display");

        previousButton.setText("Previous");
        previousButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                previousButtonActionPerformed(evt);
            }
        });

        companyLogo.setIcon(new javax.swing.ImageIcon(getClass().getResource("/inventoryprogram3/logo4.png"))); 

        saveButton.setText("Save");
        saveButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                saveButtonActionPerformed(evt);
            }
        });

        loadButton.setText("Clear");
        loadButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                loadButtonActionPerformed(evt);
            }
        });

        addbutton.setText("Add");
        addbutton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                addbuttonActionPerformed(evt);
            }
        });

        deleteButton.setText("Delete");
        deleteButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                deleteButtonActionPerformed(evt);
            }
        });

        modifyButton.setText("Modify Current Item");
        modifyButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                modifyButtonActionPerformed(evt);
            }
        });

        searchButton.setText("Search");

        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)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(pCountlabel)
                                .addGap(18, 18, 18)
                                .addComponent(pCountField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(18, 18, 18)
                                .addComponent(entireInventoryLabel))
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addGroup(layout.createSequentialGroup()
                                        .addComponent(restockLabel)
                                        .addGap(192, 192, 192)
                                        .addComponent(previousButton))
                                    .addGroup(layout.createSequentialGroup()
                                        .addComponent(loadButton)
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                        .addComponent(addbutton)
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                        .addComponent(deleteButton)
                                        .addGap(18, 18, 18)
                                        .addComponent(modifyButton)
                                        .addGap(12, 12, 12)))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addGroup(layout.createSequentialGroup()
                                        .addComponent(nextButton)
                                        .addGap(0, 0, Short.MAX_VALUE))
                                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                                        .addGap(0, 0, Short.MAX_VALUE)
                                        .addComponent(saveButton))))
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addComponent(nameLabel)
                                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                        .addGroup(layout.createSequentialGroup()
                                            .addComponent(priceLabel)
                                            .addGap(18, 18, 18)
                                            .addComponent(priceField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                                        .addGroup(layout.createSequentialGroup()
                                            .addComponent(titleLabel)
                                            .addGap(18, 18, 18)
                                            .addComponent(titleField, javax.swing.GroupLayout.PREFERRED_SIZE, 156, javax.swing.GroupLayout.PREFERRED_SIZE))
                                        .addGroup(layout.createSequentialGroup()
                                            .addComponent(iNumberLabel)
                                            .addGap(18, 18, 18)
                                            .addComponent(iNumberField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(searchButton)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(companyLogo)))
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(restockField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                                .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                                    .addComponent(inventoryValueLabel)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                    .addComponent(inventoryValueField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                                .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                                    .addComponent(stockLabel)
                                    .addGap(18, 18, 18)
                                    .addComponent(stockField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))))
                        .addGap(18, 18, 18)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(entireInventoryField, javax.swing.GroupLayout.PREFERRED_SIZE, 121, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                                .addComponent(buttonLabel)
                                .addGap(15, 15, 15)))
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
        );

        layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {iNumberLabel, pCountlabel, priceLabel, restockLabel, stockLabel, titleLabel});

        layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {iNumberField, inventoryValueField, pCountField, priceField, restockField, stockField, titleField});

        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(nameLabel)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(titleLabel)
                            .addComponent(titleField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(searchButton))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(iNumberLabel)
                            .addComponent(iNumberField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(priceLabel)
                            .addComponent(priceField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addComponent(companyLogo, javax.swing.GroupLayout.Alignment.TRAILING))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(pCountlabel)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(pCountField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(entireInventoryLabel)))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(stockLabel)
                    .addComponent(stockField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(entireInventoryField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(inventoryValueLabel)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(inventoryValueField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(buttonLabel)))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(restockLabel)
                    .addComponent(restockField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(previousButton)
                    .addComponent(nextButton))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(saveButton)
                    .addComponent(addbutton)
                    .addComponent(deleteButton)
                    .addComponent(modifyButton)
                    .addComponent(loadButton))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }

    private void nextButtonActionPerformed(java.awt.event.ActionEvent evt) {                                           


        if(counter< max -1){
        counter = counter + 1;
        }
        else{
        counter = 0;
        }
       NumberFormat realMoney = NumberFormat.getCurrencyInstance(Locale.US);
       invValue = 0;
        for (int x=0; x < max -1; x++) {

            invValue += rpg[x].itemStock * rpg[x].itemPrice;

       }


        System.out.println(counter);
        titleField.setText(rpg[counter].itemName);
        iNumberField.setText(String.valueOf(rpg[counter].itemNumber));
        pCountField.setText(String.valueOf(rpg[counter].pCount));       
        priceField.setText(String.valueOf(realMoney.format(rpg[counter].itemPrice)));
        stockField.setText(String.valueOf(rpg[counter].itemStock));
        restockField.setText(String.valueOf(rpg[counter].rFee));
        inventoryValueField.setText(String.valueOf(rpg[counter].itemStock * rpg[counter].itemPrice));


        entireInventoryField.setText(String.valueOf(realMoney.format(invValue)));

    }                                          

    private void previousButtonActionPerformed(java.awt.event.ActionEvent evt) {                                               
        if(counter>= 1){
        counter = counter - 1;
        }
        else{
        counter = max -1;
        }
       NumberFormat realMoney = NumberFormat.getCurrencyInstance(Locale.US);
       invValue = 0;
        for (int x=0; x < max -1; x++) {

           invValue += rpg[x].itemStock * rpg[x].itemPrice;

       }



        titleField.setText(rpg[counter].itemName);
        iNumberField.setText(String.valueOf(rpg[counter].itemNumber));
        pCountField.setText(String.valueOf(rpg[counter].pCount));       
        priceField.setText(String.valueOf(realMoney.format(rpg[counter].itemPrice)));
        stockField.setText(String.valueOf(rpg[counter].itemStock));
        restockField.setText(String.valueOf(rpg[counter].rFee));
        inventoryValueField.setText(String.valueOf(rpg[counter].itemStock * rpg[counter].itemPrice));


        entireInventoryField.setText(String.valueOf(realMoney.format(invValue)));
    }                                              

    private void saveButtonActionPerformed(java.awt.event.ActionEvent evt) {             
        ObjectOutputStream savefile = null;
       int dirmake = 1;
       do{ 
       try {             
            savefile = new ObjectOutputStream(new FileOutputStream("C:\\inventory\\inventory.dat"));
            savefile.writeObject(rpg);
            savefile.close();
            dirmake = 2 ;
        }
        catch (Exception e){
            String savePath = "c:\\Inventory";
            Path invPath = Paths.get(savePath);
            try {
                Files.createDirectory(invPath);
            } catch (IOException ex) {
                Logger.getLogger(inventoryGui.class.getName()).log(Level.SEVERE, null, ex);
            }

        }
       }while(dirmake == 1);
    }                                          

    private void loadButtonActionPerformed(java.awt.event.ActionEvent evt) {                                           

         titleField.setText("");
        iNumberField.setText("");
        pCountField.setText("");       
        priceField.setText("");
        stockField.setText("");
        restockField.setText("");
        inventoryValueField.setText("" );


        entireInventoryField.setText("");

    }                                          

    private void modifyButtonActionPerformed(java.awt.event.ActionEvent evt) {                                             

       int mINumber = Integer.parseInt(iNumberField.getText());
       double ss = Double.parseDouble(priceField.getText().replaceAll("[^\\d.]", ""));
        rpg[mINumber -1] = new rBook(mINumber, titleField.getText(), Integer.parseInt(stockField.getText()), ss, Integer.parseInt(pCountField.getText()));

    }                                            

    private void addbuttonActionPerformed(java.awt.event.ActionEvent evt) {                                          
        double ss = Double.parseDouble(priceField.getText().replaceAll("[^\\d.]", ""));
        max ++;
        rBook[] rpg2 = Arrays.copyOf(rpg, rpg.length);
        rBook[] rpg = Arrays.copyOf(rpg2, max);
        rpg[max -1] = new rBook(max, titleField.getText(), Integer.parseInt(stockField.getText()), ss, Integer.parseInt(pCountField.getText()));
        System.out.println(max + titleField.getText() + Integer.parseInt(stockField.getText()) + ss + Integer.parseInt(pCountField.getText()));
        counter = -1;
        System.out.println(max);
        for (int x=0; x< max; x++) {
        System.out.println("Item Number:" + rpg[5].itemNumber);
        System.out.println("Rpg Name:" + rpg[5].itemName);
        System.out.println("Copies in stock:" + rpg[5].itemStock);
        System.out.println("Price: $" + (rpg[5].itemPrice));
        System.out.println("Page Count:" + rpg[5].pCount);
        System.out.println("Restocking fee: $" + (rpg[5].rFee));
        System.out.println();
        System.out.println();
        System.out.println(rpg.length);
        }

    }                                         

    private void deleteButtonActionPerformed(java.awt.event.ActionEvent evt) {                                             


    }                                            



    public static void main(String args[]) {


        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(inventoryGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(inventoryGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(inventoryGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(inventoryGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

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


            }
        });
    }


    // Variables declaration - do not modify                     
    private javax.swing.JButton addbutton;
    private javax.swing.JLabel buttonLabel;
    private javax.swing.JLabel companyLogo;
    private javax.swing.JButton deleteButton;
    private javax.swing.JTextField entireInventoryField;
    private javax.swing.JLabel entireInventoryLabel;
    private javax.swing.JTextField iNumberField;
    private javax.swing.JLabel iNumberLabel;
    private javax.swing.JTextField inventoryValueField;
    private javax.swing.JLabel inventoryValueLabel;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JButton loadButton;
    private javax.swing.JButton modifyButton;
    private javax.swing.JLabel nameLabel;
    private javax.swing.JButton nextButton;
    private javax.swing.JTextField pCountField;
    private javax.swing.JLabel pCountlabel;
    private javax.swing.JButton previousButton;
    private javax.swing.JTextField priceField;
    private javax.swing.JLabel priceLabel;
    private javax.swing.JTextField restockField;
    private javax.swing.JLabel restockLabel;
    private javax.swing.JButton saveButton;
    private javax.swing.JButton searchButton;
    private javax.swing.JTextField stockField;
    private javax.swing.JLabel stockLabel;
    private javax.swing.JTextField titleField;
    private javax.swing.JLabel titleLabel;

}

最佳答案

你的问题的一部分是，你正在隐藏你的变量......

max ++;
rBook[] rpg2 = Arrays.copyOf(rpg, rpg.length);
rBook[] rpg = Arrays.copyOf(rpg2, max);

在这里，您已将 rpg 声明为局部变量，因此您对其所做的任何更改都不会被类的其余部分看到。尝试使用更像...的东西

rpg = Arrays.copyOf(rpg2, max);

相反...

您还可以考虑使用System.arraycopy(Object src, int srcPos, Object dest, int destPos, int length)相反...但我会先解决你其他问题;)

rBook[] rpg2 = new rBook[rpg.length + 1];
System.arraycopy(rpg, 0, rpg2, 0, rpg.length - 1);
rpg = rpg2;

或者类似的东西......

关于java swing ui 不显示重建的数组索引越界，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23729029/

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如果我使用 alter index x rebuild 重建不可用的索引，是否会重新评估之前使用该索引的任何 SQL 的执行计划？我知道在我使用的数据库版本 - Oracle 10.2.0.4.0
从校准的相机图像进行 3d 重建
我正在研究 3d 重建。现在当我考虑一对图像时。我有一组对应点。我有我的相机详细信息。例如我有焦点细节，旋转和平移矩阵(4 * 4)。我想在 3D(三角剖分)中投影我的点。因此，据我所知，因子代数非常
python - 重建:为什么不扭曲图像并标准化坐标？
从教程中:https://programtalk.com/vs2/?source=python/8176/opencv-python-blueprints/chapter4/scene3D.py 我不
opencv - 2d图像到3d(重建)
我需要您的帮助和建议。这个问题包括以下几项:某房间的照片，该房间站在严格固定位置的房间内(一个房间围绕轴线旋转)。如何将所有这些图片组合在一起，从而产生一种效果，就像我们用眼睛看到的一样？从一点开始就
c - 重建/更新内核模块
嘿那里，以下问题:我在工作中使用一个相当奇怪的 Linux 发行版(Centos 5)，它似乎有一个较旧的内核(或者至少在内核中存在一些差异)，并且您不能简单地更新它。我需要安装的程序需要一个函数 c
statistics - 受限玻尔兹曼机 - 重建
我读了一些关于受限玻尔兹曼机的文章。这些机器的重建能力经过了测试。我了解训练是如何进行的，但不了解重建是如何完成的。有人可以给我一些提示吗？最佳答案杰夫·辛顿 (Geoff Hinton) 的演讲
ios - 重建/重置核心数据时出错
如果轻量级迁移失败，我将尝试重建核心数据数据堆栈，并将用户送回登录屏幕。我正在通过将一对多关系更改为一对一关系来对此进行测试。起初，我在删除新的 persistentStoreCoordinator
MySQL索引操作命令总结（创建、重建、查询和删除索引命令详解）
以下所列示例中中 `table_name` 表示数据表名，`index_name` 表示索引名，column list 表示字段列表（如：`id`,`order_id`）。 1、创建索引索引的
Flutter - 避免 ListView 重建
当您根据 ListView.builder 和 ListView.separated valueKey = key; return _messages
flutter - 切换页面时防止谷歌地图 flutter 重建
切换底部导航页面后，我有一个非常烦人的谷歌地图 flutter 重建问题。我已经坚持了最后一次缩放和相机位置，但是每次我进入 map 页面时，小部件都会自行重建。如何预防？最佳答案采用 Autom
python - 重建 Pandas 数据框
我是 Python 的新手。我在重建一个错误的 Dataframe 时遇到了麻烦。我的数据框如下所示: df = pd.DataFrame({'col1': ['id 1', 'id 2', 'tes
MATLAB:使用八点算法进行 3d 重建
我正在尝试从 2 个图像中实现 3d 重建。我遵循的步骤是， 1. Found corresponding points between 2 images using SURF. 2. Impleme
javascript - 重建 Json 列表
// Start with this JSON var initialJson = { "rows": [{ "ID": 123, "Data": 430910, "Ver
flutter - 有条件地停止 child 重建
在有状态的小部件中，我有一个导航部分，用户可以在其中选择父项，并在子项下方显示。当我选择父级也可以重建子部件时，但是当我导航抛出父项而不选择一个子部件时，父级也可以重建(这是正常的)，但是子部件也可
3d - 脸部 3D 重建
我有一个网络摄像头，它可以围绕人的头部以给定的角度步长旋转，并为每一步获取一张图片。我正在寻找一个免费的开源库，该库从获取的图像集开始，使我能够生成代表人头部的 3D 表面，或者至少是定义明确的 3
csv - 重建 CSV 并使用字段值作为导出的文件名
我想从一行中读取一个字符串，然后将其放入一个变量中，该变量随后用作文件名。该字符串位于 .csv 文件中的第二行末尾。由于不必要的标题，需要删除第一行。还有‘;’旧 .csv 文件中使用的内容需要替换
haskell - 嵌入文件更改后的 Cabal 重建
我正在使用file-embed如此封装: import qualified Data.ByteString as B import qualified Data.ByteString.Internal
c - 重建 makefile 即使它是最新的
我的 makefile 总是重建，不明白为什么.. 这里是: SRC = $(DIR)/my_getnbr.c \ $(DIR)/my_isneg.c \ $(DI
java - 重建 Eclipse 编辑器
我有一个附带编辑器的 Eclipse 插件。我添加了更改语法突出显示颜色的首选项，但这些更改仅在我手动重新启动编辑器后才适用。我通过一个 DefaultDamagerRepairer 实现了语法高
jquery - 重建 DIV id
我有一段 php 可以输出 div(取决于数组中有多少个)并为该 div 分配一个 id(即 div_1、div_2)等我还设置了一个隐藏字段，其中包含输出了多少个 div 的计数(divcount

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java swing ui 不显示重建的数组索引越界