java课程设计报告_简单图形界面计算器的设计

} else if(op.equals(\ { result = d1 / d2; if(d2 == 0) result = 0; } else if(op.equals(\ { result = d1 % d2; if(d2 == 0) result = 0; } jTextField1.setText(\ flag = true; } “Back”退格运算 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: //if语句判定当前字符串是否为空，若不为空，则将字符串长度减1之后，再赋值给原字符串；否则，将0复制给原字符串。 String s = jTextField1.getText(); if(!s.equals(\ s = s.substring(0,s.length()-1); if(s.equals(\ s = \ jTextField1.setText(s); } “CE”复位运算 private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: //复位操作 jTextField1.setText(\ d1 = 0; d2 = 0; op = \ flag = false; } “C”清零运算 private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: //清零操作 jTextField1.setText(\ } “$”千位符分隔符private void jButton20ActionPerformed(java.awt.event.ActionEvent evt) { 运算 // TODO add your handling code here:

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//千位符分隔符 d1 = Double.parseDouble(jTextField1.getText()); flag = true; op = \ DecimalFormat f = new DecimalFormat(\ jTextField1.setText(\ }

3. 程序的调用关系图

NewJFrame Back CE C 1/x = sqrt $ 0~9 . + - * / % ±

四、全部源程序清单

/* Calculator.java GUI简单计算器 */

package javacalculator; /** *

* @author */

import java.awt.datatransfer.*; import java.text.DecimalFormat;

public class NewJFrame extends javax.swing.JFrame {

/**

* Creates new form NewJFrame */

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public NewJFrame() { initComponents(); flag = false; d1 = 0; d2 = 0; op = \

jTextField1.setText(\

clipboard = getToolkit().getSystemClipboard(); }

private Clipboard clipboard; private boolean flag; private double d1; private double d2; private String op;

@SuppressWarnings(\

//

jPanel1 = new javax.swing.JPanel(); jPanel2 = new javax.swing.JPanel(); jButton4 = new javax.swing.JButton(); jButton5 = new javax.swing.JButton(); jButton6 = new javax.swing.JButton(); jButton7 = new javax.swing.JButton(); jButton8 = new javax.swing.JButton(); jButton9 = new javax.swing.JButton(); jButton10 = new javax.swing.JButton(); jButton11 = new javax.swing.JButton(); jButton12 = new javax.swing.JButton(); jButton13 = new javax.swing.JButton(); jButton14 = new javax.swing.JButton(); jButton15 = new javax.swing.JButton(); jButton16 = new javax.swing.JButton(); jButton17 = new javax.swing.JButton(); jButton18 = new javax.swing.JButton(); jButton19 = new javax.swing.JButton(); jButton20 = new javax.swing.JButton(); jButton21 = new javax.swing.JButton(); jButton22 = new javax.swing.JButton(); jButton23 = new javax.swing.JButton(); jButton24 = new javax.swing.JButton(); jTextField1 = new javax.swing.JTextField(); jButton1 = new javax.swing.JButton(); jButton2 = new javax.swing.JButton();

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jButton3 = new javax.swing.JButton();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

jButton4.setText(\

jButton4.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton4ActionPerformed(evt); } });

jButton5.setText(\

jButton5.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton5ActionPerformed(evt); } });

jButton6.setText(\

jButton6.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton6ActionPerformed(evt); } });

jButton7.setText(\

jButton7.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton7ActionPerformed(evt); } });

jButton8.setText(\

jButton8.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton8ActionPerformed(evt); } });

jButton9.setText(\

jButton9.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton9ActionPerformed(evt); }

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});

jButton10.setText(\

jButton10.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton10ActionPerformed(evt); } });

jButton11.setText(\

jButton11.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton11ActionPerformed(evt); } });

jButton12.setText(\

jButton12.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton12ActionPerformed(evt); } });

jButton13.setText(\

jButton13.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton13ActionPerformed(evt); } });

jButton14.setText(\

jButton14.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton14ActionPerformed(evt); } });

jButton15.setText(\\

jButton15.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton15ActionPerformed(evt); } });

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