药品库存管理Java Swing代码

以下是一个简单的药品库存管理Java Swing代码示例：

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

public class DrugInventoryManager extends JFrame implements ActionListener {

    private ArrayList<Drug> drugList;
    private JLabel nameLabel, quantityLabel;
    private JTextField nameField, quantityField;
    private JButton addButton, removeButton, updateButton;

    public DrugInventoryManager() {
        this.setTitle("药品库存管理");
        this.setSize(400, 200);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        drugList = new ArrayList<Drug>();

        nameLabel = new JLabel("药品名称:");
        quantityLabel = new JLabel("药品数量:");
        nameField = new JTextField(20);
        quantityField = new JTextField(10);

        addButton = new JButton("添加");
        removeButton = new JButton("删除");
        updateButton = new JButton("更新");

        addButton.addActionListener(this);
        removeButton.addActionListener(this);
        updateButton.addActionListener(this);

        JPanel panel = new JPanel();
        panel.add(nameLabel);
        panel.add(nameField);
        panel.add(quantityLabel);
        panel.add(quantityField);
        panel.add(addButton);
        panel.add(removeButton);
        panel.add(updateButton);

        this.add(panel);
        this.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {

        if (e.getSource() == addButton) {
            String name = nameField.getText();
            int quantity = Integer.parseInt(quantityField.getText());
            drugList.add(new Drug(name, quantity));
            JOptionPane.showMessageDialog(null, "药品添加成功！");
            nameField.setText("");
            quantityField.setText("");
        } else if (e.getSource() == removeButton) {
            String name = nameField.getText();
            for (Drug drug : drugList) {
                if (drug.getName().equals(name)) {
                    drugList.remove(drug);
                    JOptionPane.showMessageDialog(null, "药品删除成功！");
                    nameField.setText("");
                    quantityField.setText("");
                    return;
                }
            }
            JOptionPane.showMessageDialog(null, "药品不存在！");
        } else if (e.getSource() == updateButton) {
            String name = nameField.getText();
            int quantity = Integer.parseInt(quantityField.getText());
            for (Drug drug : drugList) {
                if (drug.getName().equals(name)) {
                    drug.setQuantity(quantity);
                    JOptionPane.showMessageDialog(null, "药品更新成功！");
                    nameField.setText("");
                    quantityField.setText("");
                    return;
                }
            }
            JOptionPane.showMessageDialog(null, "药品不存在！");
        }
    }

    public static void main(String[] args) {
        new DrugInventoryManager();
    }

}

class Drug {

    private String name;
    private int quantity;

    public Drug(String name, int quantity) {
        this.name = name;
        this.quantity = quantity;
    }

    public String getName() {
        return name;
    }

    public int getQuantity() {
        return quantity;
    }

    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }

}

该示例实现了药品库存管理系统的基本功能，包括添加、删除和更新药品信息。用户可以通过输入药品名称和数量，来对药品库存进行管理。同时，系统会根据用户的操作结果，给出相应的提示信息。