1 package Com.TomTest;
2
3
4 import java.awt.FlowLayout;
5 import java.awt.event.*;
6 import javax.swing.JButton;
7 import javax.swing.JFrame;
8 import javax.swing.JLabel;
9 import javax.swing.JTextField;
10
11 /**
12 * @author 同步计算输入的各个数的总和与平均值
13 */
14 public class TomTest_04 extends JFrame {
15 private static final long serialVersionUID = 6515574844960224544L;
16 JTextField input = new JTextField(30);
17 JTextField output = new JTextField(30);
18 JButton close = new JButton("关闭");
19 JButton reset = new JButton("清空");
20 public TomTest_04() {
21 setupGUI();
22 }
23 public void setupGUI() {
24 this.setTitle("计算总和与平均值");
25 this.setLayout(new FlowLayout());
26 this.add(new JLabel("数据"));
27 this.add(input);
28 this.add(new JLabel("结果"));
29 this.add(output);
30 this.add(close);
31 this.add(reset);
32 setSize(400, 130);
33 input.addKeyListener(new KeyAdapter() {
34 public void keyReleased(KeyEvent e) {
35 String str = input.getText();
36 if (str.equals("") || str == null) {
37 output.setText("");
38 } else {
39 String num[] = str.split(" ");
40 int sum = 0;
41 double avg = 0.0;
42 for (int i = 0; i < num.length; i++) {
43 sum += Integer.parseInt(num[i]);
44 }
45 avg = sum * 1.0 / num.length;
46 output.setText("Sum=" + sum + ", Avg=" + avg);
47 }
48 }
49 });
50 close.addMouseListener(new MouseAdapter() {
51 public void mouseClicked(MouseEvent arg0) {
52 System.exit(0);
53 }
54 });
55 reset.addMouseListener(new MouseAdapter() {
56 public void mouseClicked(MouseEvent arg0) {
57 input.setText("");
58 output.setText("");
59 }
60 });
61 setVisible(true);
62 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
63 }
64 public static void main(String[] args) {
65 new TomTest_04();
66 }
67 }
