计算器java程序

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import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

public class CalculatorJFrame_3 extends JFrame implements ActionListener,TextListener

{

private static final long serialVersionUID = 1L;

private static int max=1000,t,i;

private static char[] ex=new char[max];

private static String str0,str_1,str_0;

private static double result=0;

private static int l=0,digit=10,length=37,m=1;

private TextArea text;

private JPanel panel_1,panel_2,panel_3,panel_4,panel_5,panel_6,panel_7,panel_8,panel_9,panel_10;

private static JRadioButton radiobutton_angle,radiobutton_rad;

private JRadioButton radiobutton_binary,radiobutton_octal,radiobutton_decimal,radiobutton_hex;

private JButton button_F,button_E,button_D,button_C,button_B,button_A;

private JButton button_9,button_8,button_7,button_6,button_5,button_4,button_3,button_2,button_1,button_0,button_point;

private JButton button_PI,button_e,button_power,button_power10,button_log10,button_log,button_Backspace,button_left_bracket;

private JButton button_right_bracket;

private JButton button_plus,button_minus,button_multiply,button_divide,button_sqrt,button_factorial,button_negative;

private JButton button_sin,button_cos,button_tan;

private JButton button_asin,button_acos,button_atan;

private JButton button_result,button_clear;

public CalculatorJFrame_3()

{

super("Calculator");

this.setSize(350,550);

this.setBackground(java.awt.Color.lightGray);

this.setLocation(400,100);

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

this.setLayout(new GridLayout(12,1));

this.setResizable(false);

text=new TextArea("",2,40,TextArea.SCROLLBARS_NONE);

text.setEditable(true);

text.setFont(new Font("宋体",Font.BOLD,16));

this.add(text);

text.addTextListener(this);

JPanel panel=new JPanel(new GridLayout(1,2));

this.add(panel);

JPanel panel_radiobutton_1=new JPanel(new GridLayout(2,2));

panel.add(panel_radiobutton_1);

ButtonGroup buttongroup_1=new ButtonGroup();

radiobutton_decimal=new JRadioButton("十进制",true);

radiobutton_decimal.addActionListener(this);

buttongroup_1.add(radiobutton_decimal);

panel_radiobutton_1.add(radiobutton_decimal);

radiobutton_binary=new JRadioButton("二进制",true);

radiobutton_binary.addActionListener(this);

buttongroup_1.add(radiobutton_binary);

panel_radiobutton_1.add(radiobutton_binary);

radiobutton_octal=new JRadioButton("八进制",true);

radiobutton_octal.addActionListener(this);

buttongroup_1.add(radiobutton_octal);

panel_radiobutton_1.add(radiobutton_octal);

radiobutton_hex=new JRadioButton("十六进制",true);

radiobutton_hex.addActionListener(this);

buttongroup_1.add(radiobutton_hex);

panel_radiobutton_1.add(radiobutton_hex);

JPanel panel_0=new JPanel(new GridLayout(1,2));

panel.add(panel_0);

JPanel panel_radiobutton_2=new JPanel(new GridLayout(2,1));

panel_0.add(panel_radiobutton_2);

ButtonGroup buttongroup_2=new ButtonGroup();

radiobutton_angle=new JRadioButton("角度",true);

radiobutton_angle.addActionListener(this);

buttongroup_2.add(radiobutton_angle);

panel_radiobutton_2.add(radiobutton_angle);

radiobutton_rad=new JRadioButton("弧度",true);

radiobutton_rad.addActionListener(this);

buttongroup_2.add(radiobutton_rad);

panel_radiobutton_2.add(radiobutton_rad);

button_result=new JButton("=");

panel_0.add(button_result);

button_result.addActionListener(this);

panel_1=new JPanel(new GridLayout(1,4));

button_9=new JButton("9");

button_8=new JButton("8");

button_7=new JButton("7");

button_clear=new JButton("Clear");

this.add(panel_1);

panel_1.add(button_9);

panel_1.add(button_8);

panel_1.add(button_7);

panel_1.add(button_clear);

button_9.addActionListener(this);

button_8.addActionListener(this);

button_7.addActionListener(this);

button_clear.addActionListener(this);

panel_2=new JPanel(new GridLayout(1,4));

button_6=new JButton("6");

button_5=new JButton("5");

button_4=new JButton("4");

button_plus=new JButton("+");

this.add(panel_2); panel_2.add(button_6);

panel_2.add(button_5);

panel_2.add(button_4);

panel_2.add(button_plus);

button_6.addActionListener(this);

button_5.addActionListener(this);

button_4.addActionListener(this);

button_plus.addActionListener(this);

panel_3=new JPanel(new GridLayout(1,4));

button_3=new JButton("3");

button_2=new JButton("2");

button_1=new JButton("1");

button_minus=new JButton("-");

this.add(panel_3);

panel_3.add(button_3);

panel_3.add(button_2);

panel_3.add(button_1);

panel_3.add(button_minus);

button_3.addActionListener(this);

button_2.addActionListener(this);

报告格式

第 1 页共 9 页信息科学与技术学院

2009—2010上学期

《Java面向对象程序设计》

课程报告

课程设计题目：

基于java图形界面的简易计算器

学号： 20091813

姓名：王泽

专业：电气工程及其自动化

教师：陈帆老师

2010-12

第 2 页共 9 页第1部分设计的内容要求

1.1本程序主要练习使用布局管理器设计一个计算器的界面，并练习使用事件监听器处理数据的输入，并完成相关的计算。

1.2通过鼠标依次输入参加计算的数值，设计的计算器应用程序则可以完成加法、减法、乘法、除法和取余运算。且有小数点、正负号、求倒数、退格和清零功能。

第2部分设计思想

本程序功能不是太复杂，主要工作是界面的设计，可以在一个类中实现。

2.1界面的布局问题

程序继承来自框架类(Frame)，总体布局上选用布局管理器BorderLayout:

(1)将单行文本框加入到“North”区域

(2)将面板panel加入到“Center”区域，同时panel包含了各种数字按钮和符号按钮。面板panel采用Girdlayout布局,选用5行*5列，将各种按钮添加到面板panel，并增加按钮监听事件。

2.2关于数据存储问题

第 3 页共 9 页计算器完成的是一个数学表达式，本次课程设计我选用的是使用链表(Linkedlist类)来存储数字和运算符号。程序运行后，输入的所有数字及运算符号都全部存储在链表中，待最后运算时，再一一求出来进行计算。

2.3.关于事件监听的处理问题

计算器的各种按钮都需要一个对象来进行监视，以便对发生的事件做出处理。计算器的各种按钮通过调用相应的方法将某个对象作为自己的监视器。

java复数计算器

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());

JAVA计算器

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);

java编写的简单计算器

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 Calculator extends JFrame

{

private JPanel jp;

private JTextField

tAdd1,tAdd2,tAdd3,tSub1,tSub2,tSub3,tMul1,tMul2,tMul3,tDiv1,tDiv2,tDiv3;

private JLabel tShow,label1,label2,label3,label4,label5,label6,label7,label8;

private JButton result,exit;

//构造器

public Calculator()

{

super("简易计算器");

Init();

}

//初始化

public void Init()

{ //显示区

tShow=new JLabel(" 感谢使用简易计算器！"); tShow.setBounds(0, 0, 300, 20);

//加法区

tAdd1=new JTextField(); tAdd2=new JTextField(); tAdd3=new JTextField();

label1=new JLabel("+"); label2=new JLabel("=");

tAdd1.setBounds(5, 25, 80, 20); label1.setBounds(85, 25, 15, 15);

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计算器java程序

合集下载

报告格式

java复数计算器

JAVA计算器

java编写的简单计算器

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