廢話不多說，直接上代碼，功能很簡單，代碼也很簡單。
可能比較復雜的地方就是使用了絕對定位布局管理器。
需要空間想象力比較好！

package com.langxikeji.AwtDemo;import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.io.FileInputStream; import javax.imageio.ImageIO;public class OrderTest {public static void main(String[] args) throws Exception {JFrame frame = new JFrame("點菜系統(tǒng)");frame.setLayout(null);frame.setResizable(false);frame.setBounds(100, 100, 600, 500);JButton btn1 = new JButton("北京烤鴨 ￥1");Image img1 = ImageIO.read(new FileInputStream("./src/Food/北京烤鴨.jpg"));ImageIcon icon = new ImageIcon(img1);btn1.setIcon(icon);btn1.setHorizontalTextPosition(JButton.CENTER);btn1.setVerticalTextPosition(JButton.BOTTOM);btn1.setBounds(30, 30, 110, 110);frame.add(btn1);JButton btn2 = new JButton("花生 ￥2");Image img2 = ImageIO.read(new FileInputStream("./src/Food/花生.jpg"));icon = new ImageIcon(img2);btn2.setIcon(icon);btn2.setHorizontalTextPosition(JButton.CENTER);btn2.setVerticalTextPosition(JButton.BOTTOM);btn2.setBounds(180, 30, 110, 110);frame.add(btn2);JButton btn3 = new JButton("醬牛肉 ￥3");Image img3 = ImageIO.read(new FileInputStream("./src/Food/醬牛肉.jpg"));icon = new ImageIcon(img3);btn3.setIcon(icon);btn3.setHorizontalTextPosition(JButton.CENTER);btn3.setVerticalTextPosition(JButton.BOTTOM);btn3.setBounds(30, 180, 110, 110);frame.add(btn3);JButton btn4 = new JButton("王八湯 ￥4");Image img4 = ImageIO.read(new FileInputStream("./src/Food/王八湯.jpg"));icon = new ImageIcon(img4);btn4.setIcon(icon);btn4.setHorizontalTextPosition(JButton.CENTER);btn4.setVerticalTextPosition(JButton.BOTTOM);btn4.setBounds(180, 180, 110, 110);frame.add(btn4);JButton btn5 = new JButton("五谷 ￥5");Image img5 = ImageIO.read(new FileInputStream("./src/Food/五谷.jpg"));icon = new ImageIcon(img5);btn5.setIcon(icon);btn5.setHorizontalTextPosition(JButton.CENTER);btn5.setVerticalTextPosition(JButton.BOTTOM);btn5.setBounds(30, 330, 110, 110);frame.add(btn5);JButton btn6 = new JButton("原味雞￥6");Image img6 = ImageIO.read(new FileInputStream("./src/Food/原味雞.jpg"));icon = new ImageIcon(img6);btn6.setIcon(icon);btn6.setHorizontalTextPosition(JButton.CENTER);btn6.setVerticalTextPosition(JButton.BOTTOM);btn6.setBounds(180, 330, 110, 110);frame.add(btn6);Font font = new Font("楷體", Font.BOLD, 20);Label label1 = new Label("已點菜單:");label1.setForeground(Color.RED);label1.setFont(font);label1.setBounds(350, 40, 100, 30);frame.add(label1);final List list = new List();list.setFont(font);list.setForeground(Color.CYAN);list.setBounds(350, 80, 200, 350);frame.add(list);final Label label2 = new Label("菜品總價:0￥");label2.setForeground(Color.RED);label2.setFont(font);label2.setBounds(350, 430, 200, 50);frame.add(label2);btn1.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {String[] items = list.getItems();boolean flag = false;int index = 0;for (int i = 0; i < items.length; i++) {if (items[i].contains("北京烤鴨")) {index = i;flag = true;break;}}if (flag) {String item = list.getItem(index);int x_index = item.indexOf("X");String value = item.substring(x_index + 1);item = item.substring(0, x_index + 1)+ (Integer.parseInt(value) + 1);list.remove(index);list.add(item, index);} else {list.add("北京烤鴨 X1");}String value = label2.getText();int begin = value.indexOf(":");int end = value.indexOf("￥");String money = value.substring(begin + 1, end);String newValue = String.valueOf((Integer.parseInt(money) + 1));value = value.replaceAll(money, newValue);label2.setText(value);}});btn2.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {String[] items = list.getItems();boolean flag = false;int index = 0;for (int i = 0; i < items.length; i++) {if (items[i].contains("花生")) {index = i;flag = true;break;}}if (flag) {String item = list.getItem(index);int x_index = item.indexOf("X");String value = item.substring(x_index + 1);item = item.substring(0, x_index + 1)+ (Integer.parseInt(value) + 1);list.remove(index);list.add(item, index);} else {list.add("花生 X1");}String value = label2.getText();int begin = value.indexOf(":");int end = value.indexOf("￥");String money = value.substring(begin + 1, end);String newValue = String.valueOf((Integer.parseInt(money) + 2));value = value.replaceAll(money, newValue);label2.setText(value);}});btn3.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {String[] items = list.getItems();boolean flag = false;int index = 0;for (int i = 0; i < items.length; i++) {if (items[i].contains("醬牛肉")) {index = i;flag = true;break;}}if (flag) {String item = list.getItem(index);int x_index = item.indexOf("X");String value = item.substring(x_index + 1);item = item.substring(0, x_index + 1)+ (Integer.parseInt(value) + 1);list.remove(index);list.add(item, index);} else {list.add("醬牛肉 X1");}String value = label2.getText();int begin = value.indexOf(":");int end = value.indexOf("￥");String money = value.substring(begin + 1, end);String newValue = String.valueOf((Integer.parseInt(money) + 3));value = value.replaceAll(money, newValue);label2.setText(value);}});btn4.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {String[] items = list.getItems();boolean flag = false;int index = 0;for (int i = 0; i < items.length; i++) {if (items[i].contains("王八湯")) {index = i;flag = true;break;}}if (flag) {String item = list.getItem(index);int x_index = item.indexOf("X");String value = item.substring(x_index + 1);item = item.substring(0, x_index + 1)+ (Integer.parseInt(value) + 1);list.remove(index);list.add(item, index);} else {list.add("王八湯 X1");}String value = label2.getText();int begin = value.indexOf(":");int end = value.indexOf("￥");String money = value.substring(begin + 1, end);String newValue = String.valueOf((Integer.parseInt(money) + 4));value = value.replaceAll(money, newValue);label2.setText(value);}});btn5.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {String[] items = list.getItems();boolean flag = false;int index = 0;for (int i = 0; i < items.length; i++) {if (items[i].contains("五谷")) {index = i;flag = true;break;}}if (flag) {String item = list.getItem(index);int x_index = item.indexOf("X");String value = item.substring(x_index + 1);item = item.substring(0, x_index + 1)+ (Integer.parseInt(value) + 1);list.remove(index);list.add(item, index);} else {list.add("五谷 X1");}String value = label2.getText();int begin = value.indexOf(":");int end = value.indexOf("￥");String money = value.substring(begin + 1, end);String newValue = String.valueOf((Integer.parseInt(money) + 5));value = value.replaceAll(money, newValue);label2.setText(value);}});btn6.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {String[] items = list.getItems();boolean flag = false;int index = 0;for (int i = 0; i < items.length; i++) {if (items[i].contains("原味雞")) {index = i;flag = true;break;}}if (flag) {String item = list.getItem(index);int x_index = item.indexOf("X");String value = item.substring(x_index + 1);item = item.substring(0, x_index + 1)+ (Integer.parseInt(value) + 1);list.remove(index);list.add(item, index);} else {list.add("原味雞 X1");}String value = label2.getText();int begin = value.indexOf(":");int end = value.indexOf("￥");String money = value.substring(begin + 1, end);String newValue = String.valueOf((Integer.parseInt(money) + 6));value = value.replaceAll(money, newValue);label2.setText(value);}});frame.setVisible(true);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);} }

總結

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