1.类图：
2.输入合法时，计算结果：
输入不合法时（输入为空，不为数字，长度不在int长度范围内等），提示输入有误，并清空输入框，重新输入：
3.代码：
1 package Practiseone;
2
3 import java.awt.EventQueue;
4 import java.awt.Font;
5 import java.awt.Frame;
6 import java.awt.event.ActionEvent;
7 import java.awt.event.ActionListener;
8
9 import javax.swing.JButton;
10 import javax.swing.JFrame;
11 import javax.swing.JLabel;
12 import javax.swing.JOptionPane;
13 import javax.swing.JPanel;
14 import javax.swing.JTextField;
15 import javax.swing.border.EmptyBorder;
16
17 public class MyJFrame extends JFrame {
18
19 private JPanel contentPane;
20 private JTextField headphone;
21 private JTextField shell;
22 private JTextField protctor;
23 private JTextField Commission;
24 private JTextField MaxNum;
25 private JTextField Difference;
26
27 /**
28 * Launch the application.
29 */
30 public static void main(String[] args) {
31 EventQueue.invokeLater(new Runnable() {
32 public void run() {
33 try {
34 MyJFrame frame = new MyJFrame();
35 frame.setVisible(true);
36 } catch (Exception e) {
37 e.printStackTrace();
38 }
39 }
40 });
41 }
42
43 /**
44 * Create the frame.
45 */
46 public MyJFrame() {
47 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
48 setBounds(100, 100, 450, 300);
49 contentPane = new JPanel();
50 contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
51 setContentPane(contentPane);
52 contentPane.setLayout(null);
53
54 JLabel lblNewLabel = new JLabel("手机配件佣金计算程序");
55 lblNewLabel.setFont(new Font("隶书", Font.PLAIN, 16));
56 lblNewLabel.setBounds(135, -2, 186, 50);
57 contentPane.add(lblNewLabel);
58
59
60 JButton btnNewButton = new JButton("OK");
61 btnNewButton.addActionListener(new ActionListener() {
62 public void actionPerformed(ActionEvent arg0) {
63 if(arg0.getSource()==btnNewButton){
64 String headphoneNum = headphone.getText();
65 String shellNum = shell.getText();
66 String protctorNum = protctor.getText();
67 Commission commission = new Commission();
68 if (commission.correct(headphoneNum)&&
69 commission.correct(shellNum)&&
70 commission.correct(protctorNum))
71 {
72 int headphone = Integer.parseInt(headphoneNum);
73 int shell = Integer.parseInt(shellNum);
74 int protctor = Integer.parseInt(protctorNum);
75 //输出计算佣金
76 double result1 = commission.Commission(headphoneNum, shellNum, protctorNum);
77 Commission.setText(String.valueOf(result1));
78 //输出最大销售量
79 String result2 = commission.mostSale(headphone, shell, protctor);
80 MaxNum.setText(result2);
81 //输出销售数量差
82 double result3 = commission.diffSale(headphone, shell, protctor);
83 Difference.setText(String.valueOf(result3));
84 }else
85 {
86 JOptionPane.showMessageDialog(null, "输入有误，请重新输入！");
87 headphone.setText("");
88 shell.setText("");
89 protctor.setText("");
90 }
91 }
92 }
93 });
94 btnNewButton.setBounds(83, 93, 93, 23);
95 contentPane.add(btnNewButton);
96
97 JButton btnNewButton_1 = new JButton("Cancle");
98 btnNewButton_1.addActionListener(new ActionListener() {
99 @Override
100 public void actionPerformed(ActionEvent arg1) {
101 // TODO Auto-generated method stub
102 System.exit(0);
103 }
104
105 });
106 btnNewButton_1.setBounds(215, 93, 93, 23);
107 contentPane.add(btnNewButton_1);
108
109 JLabel lblNewLabel_2 = new JLabel("耳机：");
110 lblNewLabel_2.setBounds(22, 55, 54, 15);
111 contentPane.add(lblNewLabel_2);
112
113 JLabel lblNewLabel_3 = new JLabel("手机壳：");
114 lblNewLabel_3.setBounds(137, 55, 54, 15);
115 contentPane.add(lblNewLabel_3);
116
117 JLabel label = new JLabel("贴膜：");
118 label.setBounds(276, 55, 54, 15);
119 contentPane.add(label);
120
121 headphone = new JTextField();
122 headphone.setBounds(54, 54, 66, 21);
123 contentPane.add(headphone);
124 headphone.setColumns(10);
125
126 shell = new JTextField();
127 shell.setBounds(188, 54, 66, 21);
128 contentPane.add(shell);
129 shell.setColumns(10);
130
131 protctor = new JTextField();
132 protctor.setBounds(316, 54, 66, 21);
133 contentPane.add(protctor);
134 protctor.setColumns(10);
135
136 JLabel lblNewLabel_1 = new JLabel("应返还的佣金：");
137 lblNewLabel_1.setBounds(18, 138, 115, 23);
138 contentPane.add(lblNewLabel_1);
139
140 Commission = new JTextField();
141 Commission.setBounds(108, 138, 139, 23);
142 contentPane.add(Commission);
143 Commission.setColumns(10);
144
145 JLabel label_1 = new JLabel("销售额最高的配件是：");
146 label_1.setBounds(17, 179, 153, 23);
147 contentPane.add(label_1);
148
149 MaxNum = new JTextField();
150 MaxNum.setColumns(10);
151 MaxNum.setBounds(137, 176, 139, 23);
152 contentPane.add(MaxNum);
153
154 JLabel label_2 = new JLabel("销售配件最多与最少数量之差：");
155 label_2.setBounds(17, 217, 241, 22);
156 contentPane.add(label_2);
157
158 Difference = new JTextField();
159 Difference.setColumns(10);
160 Difference.setBounds(189, 217, 139, 23);
161 contentPane.add(Difference);
162 }
163 }
1 import java.util.Arrays;
2
3 public class Commission {
4 public static final int headphonePrice = 80;
5 public static final int shellPrice = 10;
6 public static final int protctorPrice = 8;
7 //判断输入是否符合要求
8 public boolean correct(String num) {
9 if("".equals(num)||!(num.matches("[0-9]+"))||num.length()>8||num==null)
10 {
11 return false;
12 }
13 return true;
14 }
15
16 public double Commission(String headphone,String shell,String protctor)
17 {
18 //定义一个变量存储佣金
19 double commission = 0;
20 //计算销售额
21 double salesAmount = headphonePrice*Integer.valueOf(headphone).intValue()
22 +shellPrice*Integer.valueOf(shell).intValue()
23 +protctorPrice*Integer.valueOf(protctor).intValue();
24 //判断销售额
25 if (salesAmount<1000&&salesAmount>=0) {
26 commission=salesAmount*0.1;
27 }else if (salesAmount>=1000&&salesAmount<1800) {
28 commission = (salesAmount-1000)*0.15+100;
29 }else if (salesAmount>=1800)
30 {
31 commission = (salesAmount-1800)*0.2+220;
32 }
33 return commission;
34 }
35
36 public String mostSale(int headphone,int shell,int protctor)
37 {
38
39 double headphoneSale = headphone * 80;
40 double shellSale = shell * 10;
41 double protctorSale = protctor * 8;
42 double arrays[] = {headphoneSale,shellSale,protctorSale};
43 Arrays.sort(arrays);
44 double max = arrays[2];
45 String result="";
46 if (max==headphoneSale)
47 {
48 result+="耳机";
49 if (max==shellSale)
50 {
51 result+="、手机壳";
52 }
53 if(max==protctorSale)
54 {
55 result+="、手机膜";
56 }
57
58 }else if (max==shellSale)
59 {
60 result+="手机壳";
61 if(max==protctorSale)
62 {
63 result+="、手机膜";
64 }
65 }else {
66 result+="手机膜";
67 }
68 return result;
69 }
70
71 public static int diffSale(int headphone, int shell, int protector){
72 int arrays[] = {headphone,shell,protector};
73 int result1 = 0;//结果
74 Arrays.sort(arrays);
75 result1 = arrays[2]-arrays[0];
76 return result1;
77
78 }
79 }
时间： 2024-10-08 00:22:36