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1、用Java Swing实现简单的计算器功能 班级： 姓名： 学号： 计算机科学与工程学院 网络工程系一：源代码如下：package com.xinzhan.demoFrame;import java.awt.Font;import java.awt.Image;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JO
2、ptionPane;import javax.swing.JPanel;import javax.swing.JTextField;public class CalculatorFrame extends JFrame implements ActionListenerpublic JTextField textField = new JTextField();private final JPanel panel = new JPanel();private final JButton b12 = new JButton();private final JButton b13 = new JB
3、utton();private final JButton s5 = new JButton();private final JButton s1 = new JButton();private final JButton b7 = new JButton();private final JButton b8 = new JButton();private final JButton b9 = new JButton();private final JButton s2 = new JButton();private final JButton b4 = new JButton();priva
4、te final JButton b5 = new JButton();private final JButton b6 = new JButton();private final JButton s3 = new JButton();private final JButton b1 = new JButton();private final JButton b2 = new JButton();private final JButton b3 = new JButton();private final JButton s4 = new JButton();private final JBut
5、ton b0 = new JButton();private final JButton b11 = new JButton();private final JButton bn = new JButton();private final Image icon1 = Toolkit.getDefaultToolkit().getImage(image/cal.png);private boolean add,sub,mul,div;private boolean end = true;private double num1;/第一个操作数private double num2;/第二个操作数p
6、rivate double result;/存放结果/* * Launch the application * param args */public static void main(String args) try CalculatorFrame frame = new CalculatorFrame();frame.setVisible(true); catch (Exception e) e.printStackTrace();/* * Create the frame * return */public CalculatorFrame() super();this.setBounds
7、(Toolkit.getDefaultToolkit().getScreenSize().width/2-553/2,Toolkit.getDefaultToolkit().getScreenSize().height/2-487/2, 553, 487);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);try jbInit(); catch (Throwable e) e.printStackTrace();private void jbInit() throws Exception getContentPane().setLayout(null
8、);setFont(new Font(黑体, Font.PLAIN, 20);setTitle(计算机Jhon2.0版);this.setIconImage(icon1);getContentPane().add(textField);textField.setFont(new Font(楷体, Font.PLAIN, 20);textField.setBounds(47, 29, 448, 83);textField.setHorizontalAlignment(JTextField.RIGHT);textField.setEditable(false);textField.setText(
9、0);getContentPane().add(panel);panel.setLayout(null);panel.setBounds(10, 141, 517, 308);panel.add(b12);b12.setFont(new Font(楷体, Font.PLAIN, 20);b12.setBounds(10, 10, 106, 40);b12.setText(Cancel);b12.addActionListener(this);panel.add(b13);b13.setFont(new Font(楷体, Font.PLAIN, 30);b13.setText(CE);b13.s
10、etBounds(143, 10, 106, 40);b13.addActionListener(this);panel.add(s5);s5.setText(EXIT);s5.setFont(new Font(楷体, Font.PLAIN, 30);s5.setBounds(270, 10, 106, 40);s5.addActionListener(this);panel.add(s1);s1.setFont(new Font(楷体, Font.PLAIN, 30);s1.setText(+);s1.setBounds(401, 10, 106, 40);s1.addActionListe
11、ner(this);panel.add(b7);b7.setFont(new Font(楷体, Font.PLAIN, 30);b7.setText(7);b7.setBounds(10, 70, 106, 40);b7.addActionListener(this);panel.add(b8);b8.setFont(new Font(楷体, Font.PLAIN, 30);b8.setText(8);b8.setBounds(143, 70, 106, 40);b8.addActionListener(this);panel.add(b9);b9.setFont(new Font(楷体, F
12、ont.PLAIN, 30);b9.setText(9);b9.setBounds(270, 70, 106, 40);b9.addActionListener(this);panel.add(s2);s2.setFont(new Font(, Font.PLAIN, 30);s2.setText(-);s2.setBounds(401, 70, 106, 40);s2.addActionListener(this);panel.add(b4);b4.setFont(new Font(楷体, Font.PLAIN, 30);b4.setText(4);b4.setBounds(10, 133,
13、 106, 40);b4.addActionListener(this);panel.add(b5);b5.setFont(new Font(楷体, Font.PLAIN, 30);b5.setText(5);b5.setBounds(143, 133, 106, 40);b5.addActionListener(this);panel.add(b6);b6.setFont(new Font(楷体, Font.PLAIN, 30);b6.setText(6);b6.setBounds(270, 133, 106, 40);b6.addActionListener(this);panel.add
14、(s3);s3.setFont(new Font(楷体, Font.PLAIN, 30);s3.setText(*);s3.setBounds(401, 133, 106, 40);s3.addActionListener(this);panel.add(b1);b1.setFont(new Font(楷体, Font.PLAIN, 30);b1.setText(1);b1.setBounds(10, 195, 106, 40);b1.addActionListener(this);panel.add(b2);b2.setFont(new Font(楷体, Font.PLAIN, 30);b2
15、.setText(2);b2.setBounds(143, 195, 106, 40);b2.addActionListener(this);panel.add(b3);b3.setFont(new Font(楷体, Font.PLAIN, 30);b3.setText(3);b3.setBounds(270, 195, 106, 40);b3.addActionListener(this);panel.add(s4);s4.setFont(new Font(楷体, Font.PLAIN, 30);s4.setText(/);s4.setBounds(401, 195, 106, 40);s4
16、.addActionListener(this);panel.add(b0);b0.setFont(new Font(楷体, Font.PLAIN, 30);b0.setText(0);b0.setBounds(10, 258, 106, 40);b0.addActionListener(this);panel.add(b11);b11.setFont(new Font(楷体, Font.PLAIN, 30);b11.setText(.);b11.setBounds(143, 258, 106, 40);b11.addActionListener(this);panel.add(bn);bn.
17、setFont(new Font(楷体, Font.PLAIN, 30);bn.setText(=);bn.setBounds(270, 258, 237, 40);bn.addActionListener(this); private void getNumber(int num)String str = ; String s = new String(String.valueOf(num);if(end)/输入完毕，将文本框置零this.textField.setText(0);end = false;else if(this.textField.getText().equals(0)th
18、is.textField.setText(s);/如果文本框值为零，则将其覆盖elsestr = this.textField.getText()+s;this.textField.setText(str);/如果文本框值不为零，则在后面添加数字private void sign(int s)if(s=1)add = true;sub = false;mul = false;div = false;else if(s=2)add = false;sub = true;mul = false;div = false;else if(s=3)add = false;sub = false;mul
19、= true;div = false;else if(s=4)add = false;sub = false;mul = false;div = true;else if(s=5)add = false;sub = false;mul = false;div = false;num1 = Double.parseDouble(this.textField.getText();/获得输入的第一个操作数end = false;this.textField.setText(0);/操作数num1输入结束public void point()String s ;if(this.textField.ge
20、tText().indexOf(.)0)sb.deleteCharAt(this.textField.getText().length()-1);/删除最后一位数字this.textField.setText(sb.toString();elsethis.textField.setText();else if(e.getSource()=b11)/小数点point();else if(e.getSource()=bn)/获得等号cal();二：测试num1 = 15,num2 = 3;相加相减相乘相除除数为零的情况三：心得体会：通过这次的实验课，让我真的学会了好多知识，尤其是参数的传递，让我明白了参数传递的好处和重要性。同时也锻炼了我的思维，在一开始的时候感觉这个真的很好做，于是用JBuilder2008不一会把界面就画好了，但是做了一会才发现有好多问题，不知道怎么去解决。比如说，小数点值能输一次，还有如果文本框的值本来为0，当我们输个1的时候，它需要把0覆盖掉，尤其是把输入的数字拼接起来等等一系列的问题。但是经过自己的一番努力下还是把它做出来了，虽然可能还存在许多问题有待解决，但是基本上的功能实现了，感觉还是蛮有收获的，更重要的是发现自己在Swing这块还有好多东西没有弄明白，我觉得今后应该更加的努力去学习更多知识。
