计算器的java代码

Java课程设计说明书

- - 1

Java程序设计说明书

设计题目： Java计算器

学生姓名：

指导教师：

专业名称：计算机科学与技术

所在院系：

Java课程设计说明书

- - 2 目 录

摘 要 2

第1章 计算器概述

1.1设计目的 4

1.2功能模块设计 4

1.3系统功能图 4 第2章

设计实现的详细步骤 6

2. 1使用软件 6

2.2图形界面设计方法 ························································································· 7

2．2．1 计算器界面 7

2．2．2 界面设计代码 7

2.3程序运行效果 9

第3章 设计中遇到的重点及难点 ······································································· 13

public class ComplexNumber{ public double real; public double imaginary; //public double realPart; //public double unrealPart; public ComplexNumber(){ } public ComplexNumber(String str){ int x ;String y; String real = null, unreal = null; if(str.contains("i")) { x = str.indexOf("i"); int x1 = str.substring(0, x).indexOf("+"); int y1 = str.substring(0, x).indexOf("-"); int x2=str.substring(x, str.length()).indexOf("+"); int y2=str.substring(x, str.length()).indexOf("-"); if(!str.substring(0, x).contains("+")&&!str.substring(0, x).contains("-")){ unreal = str.substring(0, x); real = str.substring(x+1, str.length()); } if(str.substring(0, x).contains("+")&&!str.substring(0, x).contains("-")){ unreal = str.substring(x1, x); real = str.substring(0, x1); } if(str.substring(0, x).contains("+")&&str.substring(0, x).contains("-")){ unreal = str.substring(x1, x); real = str.substring(0, x1); } if(!str.substring(0, x).contains("+") && str.substring(0, x).contains("-")){ unreal = str.substring(y1,x); if(str.substring(x, str.length()).contains("+")) real = str.substring(x2+1, str.length()); else if(str.substring(x, str.length()).contains("-")) real = str.substring(y2, str.length()); else real=str.substring(0,y1); } //real = str.substring(0, x); //unreal = str.substring(x+1, str.length()-1); this.real = Double.parseDouble(real); this.imaginary = Double.parseDouble(unreal); } } public ComplexNumber(double a,double b){ real=a; imaginary=b; } public double getReal(){ return real; } public double getImaginary(){ return imaginary; } public void setReal(double mReal){ real=mReal; } public void setImaginary(int mImaginary){ imaginary=mImaginary; } public static ComplexNumber he(ComplexNumber X,ComplexNumber Y){ ComplexNumber Complex=new ComplexNumber(); Complex.real=X.real+Y.real; Complex.imaginary=X.imaginary+Y.imaginary; return Complex; } public static ComplexNumber cha(ComplexNumber X,ComplexNumber Y){ ComplexNumber Complex=new ComplexNumber(); Complex.real=X.real-Y.real; Complex.imaginary=X.imaginary-Y.imaginary; return Complex; } public static ComplexNumber cheng(ComplexNumber X,ComplexNumber Y){ ComplexNumber Complex=new ComplexNumber(); Complex.real=X.real*Y.real-X.imaginary*Y.imaginary; Complex.imaginary=X.imaginary+Y.imaginary; return Complex; } public static ComplexNumber chu(ComplexNumber X,ComplexNumber Y){ ComplexNumber Complex=new ComplexNumber(); Complex.real=(X.real*Y.real+X.imaginary*Y.imaginary)/(Y.real*Y.real+Y.imaginary*Y.imaginary); Complex.imaginary=(-X.real*Y.imaginary+X.imaginary*Y.real)/(Y.real*Y.real+Y.imaginary*Y.imaginary); return Complex; } public String toString(){ return ("("+real+(imaginary<0 ? "-"+imaginary*(-1) : "+"+imaginary )+"i"+")"); } } import java.awt.Color; import ponent; import java.awt.Container; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class smallComputer extends JFrame{ private JLabel jl1=new JLabel("输入x:"); private JTextField jtf1=new JTextField(6); private JLabel jl2=new JLabel("输入y:"); private JTextField jtf2=new JTextField(6); private JLabel jl3=new JLabel("结果"); private static JButton jb1=new JButton("+"); private JButton jb2=new JButton("-"); private JButton jb3 =new JButton("*"); private JButton jb4=new JButton("/"); private double realPart; private double unrealPart; //构造方法 public smallComputer(double realPart,double unrealPart){ this.realPart = realPart; this.unrealPart = unrealPart; } //toString()方法 public String toString(){ if(unrealPart > 0) return realPart+"+"+unrealPart+"i"; else if(unrealPart < 0){ unrealPart = -unrealPart; } return realPart+"-"+unrealPart+"i"; } //虚数的加法 public void add(ComplexNumber a){ //realPart = realPart + a.realPart; // unrealPart = unrealPart + a.unrealPart; } public smallComputer (){ setTitle("复数计算器"); setSize(300, 300); setLocationRelativeTo(null);//使窗口dialog显示到屏幕中央 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); this.setLayout(new GridLayout(4,1)); JPanel jp1=new JPanel(); jp1.setBackground(Color.YELLOW); jp1.add(jl1); jp1.add(jtf1); this.add(jp1); JPanel jp2=new JPanel(); jp2.setBackground(Color.PINK); jp2.add(jl2); jp2.add(jtf2); this.add(jp2); JPanel jp3=new JPanel(); jp3.setBackground(Color.WHITE); jp3.add(jl3); this.add(jp3); JPanel jp4=new JPanel(); jp4.setBackground(Color.CYAN); jp4.add(jb1); jp4.add(jb2); jp4.add(jb3); jp4.add(jb4); this.add(jp4); jb1.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent arg0) { ComplexNumber x = new ComplexNumber(jtf1.getText().trim()); ComplexNumber y=new ComplexNumber(jtf2.getText().trim()); ComplexNumber z = ComplexNumber.he(x, y); jl3.setText(z + ""); //x.toString() + " + " + y.toString() + " = " + } }); jb2.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent arg0) { ComplexNumber x = new ComplexNumber(jtf1.getText().trim());

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class jisuanqi extends JFrame implements ActionListener,ItemListener{//ItemListener用于捕获带有item的组件产生的事件

JTextField text;

JTextField textMemory;//内存中记录

boolean clickable;

double memoryd;

int memoryi;

String copy;

public jisuanqi(){

super("计算器");

setSize(450,230);

}

public void init(){

clickable = true;

JPanel pa1=new JPanel();

pa1.setBackground(new Color(236,231,210));//设置背景色

text=new JTextField("0.",38);//设置文本框长度

text.setHorizontalAlignment(JTextField.RIGHT);//从右到左

pa1.add("North",text);//面板添加和按钮的设置

JPanel pa=new JPanel();

JPanel pa2=new JPanel();

JButton bt1=new JButton("Backspace");

JButton bt2=new JButton("CE");

JButton bt3=new JButton("c");

bt3.setForeground(Color.red);

bt3.setBackground(Color.gray);

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Font;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JTextField;

import javax.swing.SwingConstants;

public class 计算器2 implements ActionListener {

JPanel jp1 = new JPanel();

JButton b[] = new JButton[20];

GridLayout gb1 = new GridLayout(5, 0, 3, 3); // 布局方式

JFrame jf = new JFrame("宋信飞");

JTextField t = new JTextField("0", 300); // 文本框

int in1 = 0; // in1 in2 in3 没用

int in2 = 0;

int in3 = 0;

public 计算器2() {

b[0] = new JButton("0");

b[1] = new JButton("1");

b[2] = new JButton("2");

b[3] = new JButton("3");

b[4] = new JButton("4");

b[5] = new JButton("5");

b[6] = new JButton("6");