商品库存管理系统（Java）

package merchant; //import java.awt.BorderLayout; import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTabbedPane; import javax.swing.JTextArea; import javax.swing.JTextField; public class MainFrame extends JFrame { private Inventory inventory=new Inventory(); private Invoice invoice =new Invoice(inventory); final JTextArea textArea1=new JTextArea(); final JTextArea textArea2=new JTextArea(); //constructor public MainFrame() { super(); setTitle("商品库存管理系统"); final JTabbedPane tabbedPane=new JTabbedPane(); final JPanel panel1=new JPanel(); final JPanel panel2=new JPanel(); final JScrollPane scrollPane1=new JScrollPane(textArea1); final JScrollPane scrollPane2=new JScrollPane(textArea2); final JTextField id1_field=new JTextField(4); final JTextField number1_field=new JTextField(4); final JTextField id2_field=new JTextField(4); final JTextField number2_field=new JTextField(4); final JPanel panelButton1=new JPanel(); final JPanel panelButton2=new JPanel(); final JPanel panelInput1=new JPanel(); final JPanel panelInput2=new JPanel(); final JButton inventoryAddButton=new JButton(); final JButton inventoryRemoveButton=new JButton(); final JButton invoiceAddButton=new JButton(); final JButton invoiceDeleteButton=new JButton(); getContentPane().add(tabbedPane,BorderLayout.CENTER); tabbedPane.add("存货单",panel1); tabbedPane.add("提货单",panel2); panel1.setLayout(new BorderLayout()); panel1.add(scrollPane1,BorderLayout.CENTER); panel1.add(panelButton1,BorderLayout.SOUTH); panel1.add(panelInput1,BorderLayout.NORTH); panelInput1.add(new JLabel("存货单某项的id：")); panelInput1.add(id1_field); panelInput1.add(new JLabel("商品数量：")); panelInput1.add(number1_field); panelButton1.add(inventoryAddButton); inventoryAddButton.setText("增加商品数量"); panelButton1.add(inventoryRemoveButton); inventoryRemoveButton.setText("减少商品数量"); textArea1.setEditable(false); scrollPane2.setViewportView(textArea2); panel2.setLayout(new BorderLayout()); panel2.add(scrollPane2,BorderLayout.CENTER); panel2.add(panelButton2,BorderLayout.SOUTH); panel2.add(panelInput2,BorderLayout.NORTH); panelInput2.add(new JLabel("提货单某项id：")); panelInput2.add(id2_field); panelInput2.add(new JLabel("商品数量：")); panelInput2.add(number2_field); panelButton2.add(invoiceAddButton); invoiceAddButton.setText("增加提货单"); panelButton2.add(invoiceDeleteButton); invoiceDeleteButton.setText("减少提货单"); textArea2.setEditable(false); scrollPane2.setViewportView(textArea2); refreshInventory(); refreshInvoice(); inventoryAddButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { try{ inventory.addUnits(id1_field.getText(), Integer.parseInt(number1_field.getText())); }catch(NumberFormatException ex){ JOptionPane.showMessageDialog(null,"输入的商品数量错误！","警告",JOptionPane.ERROR_MESSAGE); } refreshInventory(); } }); inventoryRemoveButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { try{ inventory.removeUnits(id1_field.getText(), Integer.parseInt(number1_field.getText())); }catch(NumberFormatException ex){ JOptionPane.showMessageDialog(null,"输入的商品数量错误！","警告",JOptionPane.ERROR_MESSAGE); } refreshInventory(); } }); invoiceAddButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { try{ invoice.addItem(id2_field.getText(), Integer.parseInt(number2_field.getText())); }catch(NumberFormatException ex){ JOptionPane.showMessageDialog(null,"输入的商品数量错误！","警告",JOptionPane.ERROR_MESSAGE); } refreshInvoice(); refreshInventory(); } }); invoiceDeleteButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { invoice.delItem(id2_field.getText()); refreshInvoice(); } }); } public void refreshInventory() { String str=null; for(int i=0;i<inventory.list.length;i++) { str=inventory.toString()+"\n"; } textArea1.setText(str); } public void refreshInvoice() { String str=null; for(int i=0;i<invoice.list.length;i++) { str=invoice.toString()+"\n"; } textArea2.setText(str); } public static void main(String[] args) { MainFrame frame=new MainFrame(); frame.setBounds(100,100,500,400); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }