我一直在处理库存应用程序，我正在尝试为列表中的对象添加价格，数量，描述和名称。
Netbeans现在说无法找到'symbol：method ProductInfo（String，String，int，int）'。
这是问题的代码 258 ：
import java.util.*;
//NO CLASS
/**
*
* @author matthewmurchison
*/
public class mVentoryHome extends javax.swing.JFrame {
/**
* Creates new form mVentoryHome
*/
public mVentoryHome() {
initComponents();
}
public class ProductInfo{
String name, des;
int ID, num;
}
/**
*
*/
public static void Inventory(){
}
//creat Array
ArrayList <ProductInfo> Inventory = new ArrayList <ProductInfo> ();
/**
* 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() {
IDIn = new javax.swing.JTextField();
NameIn = new javax.swing.JTextField();
DesOut = new javax.swing.JLabel();
IDOut = new javax.swing.JLabel();
NameOut = new javax.swing.JLabel();
AddGo = new javax.swing.JButton();
NameGo = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
IDGo = new javax.swing.JButton();
Title = new javax.swing.JLabel();
jLabel5 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
NameSearch = new javax.swing.JTextField();
IDSearch = new javax.swing.JTextField();
DesIn = new javax.swing.JTextField();
jLabel6 = new javax.swing.JLabel();
NumIn = new javax.swing.JTextField();
NumOut = new javax.swing.JLabel();
Title1 = new javax.swing.JLabel();
Title2 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setBackground(new java.awt.Color(0, 0, 0));
setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
setEnabled(false);
AddGo.setText("Add");
AddGo.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
AddGoActionPerformed(evt);
}
});
NameGo.setText("Search Name");
NameGo.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
NameGoActionPerformed(evt);
}
});
jLabel1.setBackground(new java.awt.Color(0, 0, 0));
jLabel1.setForeground(new java.awt.Color(255, 255, 255));
jLabel1.setText("Name");
IDGo.setText("Search ID #");
IDGo.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
IDGoActionPerformed(evt);
}
});
Title.setIcon(new javax.swing.ImageIcon(getClass().getResource("/mVentory Logo Small.png"))); // NOI18N
jLabel5.setBackground(new java.awt.Color(0, 0, 0));
jLabel5.setForeground(new java.awt.Color(255, 255, 255));
jLabel5.setText("ID #");
jLabel4.setBackground(new java.awt.Color(0, 0, 0));
jLabel4.setForeground(new java.awt.Color(255, 255, 255));
jLabel4.setText("Name");
jLabel3.setBackground(new java.awt.Color(0, 0, 0));
jLabel3.setForeground(new java.awt.Color(255, 255, 255));
jLabel3.setText("Description");
jLabel2.setBackground(new java.awt.Color(0, 0, 0));
jLabel2.setForeground(new java.awt.Color(255, 255, 255));
jLabel2.setText("ID #");
jLabel6.setBackground(new java.awt.Color(0, 0, 0));
jLabel6.setForeground(new java.awt.Color(255, 255, 255));
jLabel6.setText("Number");
Title1.setBackground(new java.awt.Color(0, 0, 0));
Title1.setForeground(new java.awt.Color(255, 255, 255));
Title1.setText("Add Items");
Title2.setBackground(new java.awt.Color(0, 0, 0));
Title2.setForeground(new java.awt.Color(255, 255, 255));
Title2.setText("Search Items");
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(101, 101, 101)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(157, 157, 157)
.add(IDOut, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 103, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(NameOut, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 103, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(NumOut, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 40, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(DesOut, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 260, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
.add(0, 0, Short.MAX_VALUE))
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.addContainerGap(68, Short.MAX_VALUE)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(jLabel3)
.add(jLabel2)
.add(jLabel1)
.add(jLabel6))
.add(18, 18, 18)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(6, 6, 6)
.add(AddGo, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 163, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
.add(NumIn)
.add(DesIn)
.add(IDIn)
.add(NameIn, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 235, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))))
.add(layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(jLabel4)
.add(jLabel5))
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, NameSearch, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 235, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
.add(IDGo, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(NameGo, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 163, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(IDSearch, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 235, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))))
.add(84, 84, 84))
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(Title2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 163, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(133, 133, 133))
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(Title)
.add(Title1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 163, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(125, 125, 125))))
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(Title)
.add(79, 79, 79)
.add(Title1)
.add(27, 27, 27)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
.add(layout.createSequentialGroup()
.add(NameIn, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(16, 16, 16)
.add(IDIn, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(18, 18, 18)
.add(DesIn, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(18, 18, 18)
.add(NumIn, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(layout.createSequentialGroup()
.add(jLabel1)
.add(16, 16, 16)
.add(jLabel2)
.add(18, 18, 18)
.add(jLabel3)
.add(18, 18, 18)
.add(jLabel6)))
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(AddGo)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(Title2)
.add(40, 40, 40)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(jLabel4)
.add(46, 46, 46)
.add(jLabel5))
.add(layout.createSequentialGroup()
.add(NameSearch, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(NameGo)
.add(11, 11, 11)
.add(IDSearch, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(18, 18, 18)
.add(IDGo)))
.add(93, 93, 93)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(NameOut, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 22, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(IDOut, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 22, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(NumOut, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 22, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(18, 18, 18)
.add(DesOut, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 22, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(66, 66, 66))
);
pack();
}// </editor-fold>
private void AddGoActionPerformed(java.awt.event.ActionEvent evt) {
// Add Item
String Name, Description;
int Identification, Number;
Name = NameIn.getText();
Description = DesIn.getText();
Identification = Integer.parseInt(IDIn.getText());
Number = Integer.parseInt(NumIn.getText());
Inventory.add(ProductInfo(Name, Description, Identification, Number));
}
private void NameGoActionPerformed(java.awt.event.ActionEvent evt) {
// Search by Name
}
private void IDGoActionPerformed(java.awt.event.ActionEvent evt) {
// Search by ID
}
/**
* @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(mVentoryHome.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(mVentoryHome.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(mVentoryHome.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(mVentoryHome.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 mVentoryHome().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton AddGo;
private javax.swing.JTextField DesIn;
private javax.swing.JLabel DesOut;
private javax.swing.JButton IDGo;
private javax.swing.JTextField IDIn;
private javax.swing.JLabel IDOut;
private javax.swing.JTextField IDSearch;
private javax.swing.JButton NameGo;
private javax.swing.JTextField NameIn;
private javax.swing.JLabel NameOut;
private javax.swing.JTextField NameSearch;
private javax.swing.JTextField NumIn;
private javax.swing.JLabel NumOut;
private javax.swing.JLabel Title;
private javax.swing.JLabel Title1;
private javax.swing.JLabel Title2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
// End of variables declaration
}
答案 0 :(得分：1)
将arraylist放在方法中意味着它只能通过它所在的方法访问，并在方法运行完毕后丢失。你有两个选择。
将方法的返回类型更改为arraylist并返回并操纵arraylist
在全局方法的全局方法之外创建arraylist。
此代码块应该有所帮助：
public class mVentoryHome extends javax.swing.JFrame {
private static ArrayList <ProductInfo> Inventory = new ArrayList<ProductInfo>();
}