java课程设计源代码

1、精选文档附录：源程序/ Jsq.java/ 范富强/ 简介：/ 简洁计算器/package zy7;import java.awt.*;import javax.swing.*;import java.awt.event.*;public class Jsq public static void main(String args) MyFrame mm = new MyFrame();class MyFrame extends Frame TextField tf = new TextField(25);JButton b3 = new JButton("DEL");JBu

2、tton b33 = new JButton("AC/ON");JButton b4 = new JButton("0");JButton b41 = new JButton("");JButton b42 = new JButton("+");JButton b1 = new JButton("1");JButton b2 = new JButton("2");JButton b_3 = new JButton("3");JButton b_4 = ne

3、w JButton("4");JButton b5 = new JButton("5");JButton b6 = new JButton("6");JButton b7 = new JButton("7");JButton b8 = new JButton("8");JButton b9 = new JButton("9");JButton b_chu = new JButton("÷");JButton b_cheng = new JButt

4、on("×");JButton b_jian = new JButton("-");MyFrame() / 界面管理布局JLabel l = new JLabel("简洁计算器"); l.setForeground(Color.black); JPanel pla = new JPanel(); pla.add(l); / 将第一行放在一个panel最上边 b3.addActionListener(new listen(this); b33.addActionListener(new listen(this); b4.add

5、ActionListener(new listen(this);b41.addActionListener(new listen(this);b42.addActionListener(new listen(this);b1.addActionListener(new listen(this);b2.addActionListener(new listen(this);b_3.addActionListener(new listen(this); b_4.addActionListener(new listen(this);b5.addActionListener(new listen(thi

6、s);b6.addActionListener(new listen(this);b7.addActionListener(new listen(this);b8.addActionListener(new listen(this);b9.addActionListener(new listen(this);b_chu.addActionListener(new listen(this);b_cheng.addActionListener(new listen(this);b_jian.addActionListener(new listen(this);JFrame f = new JFra

7、me("计算器");JPanel p = new JPanel();p.setLayout(new GridLayout(3, 1, 4, 4);JPanel p1 = new JPanel();p1.add(tf);/ 放置的是计算器的输入框JPanel p2 = new JPanel(); p2.setLayout(new GridLayout(3, 3, 4, 4); /布局管理器中各种按钮的排布p2.add(b7);p2.add(b8);p2.add(b9);p2.add(b_cheng);p2.add(b_4); p2.add(b5);p2.add(b6);p2.

8、add(b_chu);p2.add(b1);p2.add(b2);p2.add(b_3);p2.add(b_jian); JPanel p3 = new JPanel(); /删除和清零按钮 p3.setLayout(new GridLayout(1, 2, 0, 0); p3.add(b3); p3.add(b33); b33.setForeground(Color.red); b33.setBackground(Color.yellow); b3.setForeground(Color.black); Panel p4 = new Panel(); BorderLayout s = new

9、 BorderLayout(); p4.setLayout(s); p4.setBackground(Color.red); p4.add(b4, BorderLayout.WEST); p4.add(b41, BorderLayout.CENTER); p4.add(b42, BorderLayout.EAST); p.add(l, BorderLayout.NORTH); p.add(p1, BorderLayout.CENTER); p.add(p3, BorderLayout.SOUTH); f.setLayout(new BorderLayout(30, 5); f.add(p, B

10、orderLayout.NORTH); f.add(p2, BorderLayout.CENTER); f.add(p4, BorderLayout.SOUTH); f.pack(); f.setVisible(true); f.setLocation(900, 300); f.setSize(200, 300); f.setResizable(false); class listen implements ActionListener /创建监听大事MyFrame dd;listen(MyFrame ds) this.dd = ds;public static int zhi = 0;pub

11、lic static int nextzhi = 0;public static int sum = 0;public static int fuhao;public void actionPerformed(ActionEvent e) /实现计算的函数 if (dd.b1 = e.getSource() dd.tf.setText(dd.tf.getText() + "1"); else if (dd.b2 = e.getSource() dd.tf.setText(dd.tf.getText() + "2"); else if (dd.b_3 =

12、e.getSource() dd.tf.setText(dd.tf.getText() + "3"); else if (dd.b_4 = e.getSource() dd.tf.setText(dd.tf.getText() + "4"); else if (dd.b5 = e.getSource() dd.tf.setText(dd.tf.getText() + "5"); else if (dd.b6 = e.getSource() dd.tf.setText(dd.tf.getText() + "6");

13、else if (dd.b7 = e.getSource() dd.tf.setText(dd.tf.getText() + "7"); else if (dd.b8 = e.getSource() dd.tf.setText(dd.tf.getText() + "8"); else if (dd.b9 = e.getSource() dd.tf.setText(dd.tf.getText() + "9"); else if (dd.b_cheng = e.getSource() / 计算乘法 fuhao = 1; zhi = Int

14、eger.parseInt(dd.tf.getText();/ 得到了文本框里的值; dd.tf.setText(""); else if (dd.b_chu = e.getSource() / 计算除法 fuhao = 2; zhi = Integer.parseInt(dd.tf.getText();/ 得到了文本框里的值; dd.tf.setText(""); else if (dd.b_jian = e.getSource() / 计算减法 fuhao = 3; zhi = Integer.parseInt(dd.tf.getText();/ 得

15、到了文本框里的值; dd.tf.setText(""); else if (dd.b3 = e.getSource() / 退格 得到里面的值.从最终的一位开头删除 StringBuffer sb = new StringBuffer(dd.tf.getText(); int changdu = sb.length(); if (changdu > 0) sb.deleteCharAt(changdu - 1);/ 删除的是最终的一位 dd.tf.setText(sb.toString(); else dd.tf.setText(""); else

16、 if (dd.b33 = e.getSource() / 清零 zhi = 0;nextzhi = 0;sum = 0;dd.tf.setText(""); else if (dd.b4 = e.getSource() dd.tf.setText(dd.tf.getText() + "0"); else if (dd.b41 = e.getSource() / 等号; nextzhi = Integer.parseInt(dd.tf.getText();/ 得到了文本框里的值;dd.tf.setText("");if (fuhao = 1) / 计算的是乘法; sum = zhi * nextzhi; dd.tf.setText(sum + ""); else if (fuhao = 2) / 计算除法 sum = zhi / nextzhi; dd.tf.setText(sum + ""); else if (fuhao = 3) / 计算减法 sum = zhi - ne