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java简化计算器源代码 java实现简易计算器完整代码
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求java简单计算器源代码
/*
*
*
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Vector;
public class Tuo
{
String str1="0"; //运算数1 初值一定为0 为了程序的安全
String str2="0"; //运算数2
String fh="+"; //运算符
String jg="";//结果
//状态开关 重要
int k1=1;//开关1 用于选择输入方向 将要写入str2或 str2
int k2=1;//开关2 符号键 次数 k21说明进行的是2+3-9+8 这样的多符号运算
int k3=1;//开关3 str1 是否可以被清0 ==1时可以 !=1时不能被清0
int k4=1;//开关4 str2 同上
int k5=1;//开关5 控制小数点可否被录入 ==1时可以 !=1 输入的小数点被丢掉
JButton jicunqi; //寄存器 记录 是否连续按下符号键
Vector vt=new Vector(20,10);
JFrame frame=new JFrame("sunshine---计算器");
JTextField jg_TextField=new JTextField(jg,20);//20列
JButton clear_Button=new JButton("清除");
JButton button0=new JButton("0");
JButton button1=new JButton("1");
JButton button2=new JButton("2");
JButton button3=new JButton("3");
JButton button4=new JButton("4");
JButton button5=new JButton("5");
JButton button6=new JButton("6");
JButton button7=new JButton("7");
JButton button8=new JButton("8");
JButton button9=new JButton("9");
JButton button_Dian=new JButton(".");
JButton button_jia=new JButton("+");
JButton button_jian=new JButton("-");
JButton button_cheng=new JButton("*");
JButton button_chu=new JButton("/");
JButton button_dy=new JButton("=");
////////////////////////////////////////////////////////////////////////
public static void main(String[] args)
{
Tuo tuo=new Tuo();
}
/////////////////////////////////////////////////////////////////////////
Tuo()
{
button0.setMnemonic(KeyEvent.VK_0);//等效键
//其它 等效键 略,
jg_TextField.setHorizontalAlignment(JTextField.RIGHT );//文本框 右对齐
JPanel pan=new JPanel();
pan.setLayout(new GridLayout(4,4,5,5));//四行四列 边距为5像素
pan.add(button7);
pan.add(button8);
pan.add(button9);
pan.add(button_chu);
pan.add(button4);
pan.add(button5);
pan.add(button6);
pan.add(button_cheng);
pan.add(button1);
pan.add(button2);
pan.add(button3);
pan.add(button_jian);
pan.add(button0);
pan.add(button_Dian);
pan.add(button_dy);
pan.add(button_jia);
pan.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));//pan对象的边距
JPanel pan2=new JPanel();
pan2.add(jg_TextField);
JPanel pan3=new JPanel(); //为什么要 多此一句呢？ 因为我不会设置 按钮的大小
pan3.setLayout(new FlowLayout());
pan3.add(clear_Button);
//clear_Button.setSize(10,10);//设置清零按钮的大小 吗的 不好使 ！！
frame.setLocation(300, 200); //主窗口 出现在位置
frame.setResizable(false); //不能调大小
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(pan2,BorderLayout.NORTH);
frame.getContentPane().add(pan,BorderLayout.CENTER);
frame.getContentPane().add(pan3,BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
//以上是 控件 和 布局
//下面是事件处理 程 序
//--------------- 数 字 键 ----------------
class JianTing implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String ss=((JButton)e.getSource()).getText();
jicunqi=(JButton)e.getSource();
vt.add(jicunqi);
if (k1==1)
{
if(k3==1)
{
str1="";
k5=1;//还原开关k5状态
}
str1=str1+ss;
//k2=1;
k3=k3+1;
//System.out.println(str1);
jg_TextField.setText(str1);//显示
}
else if(k1==2)
{
if (k4==1)
{
str2="";
k5=1; //还原开关k5状态
}
str2=str2+ss;
//k2=2;
k4=k4+1;
///////////////测试////////////////
jg_TextField.setText(str2);
}
}
}
//－－－－－－－－符 号－－－－－－－－－－－
class JianTing_fh implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String ss2=((JButton)e.getSource()).getText();
jicunqi=(JButton)e.getSource();
vt.add(jicunqi);
if(k2==1)
{
k1=2;//开关 k1 为1时,向数1写 为2时，向数2写
k5=1;
fh=ss2;
k2=k2+1;//按符号键的次数
}
else
{
int a=vt.size();
JButton c=(JButton)vt.get(a-2);
if(!(c.getText().equals("+"))!(c.getText().equals("-"))!(c.getText().equals("*"))!(c.getText().equals("/")))
//if(!(vt.get(a-2).getText().equals("-"))||!(vt.get(a-2).getText().equals("+"))||!(vt.get(a-2).getText().equals("*"))||!(vt.get(a-2).getText().equals("/")))
{ yuns();
str1=jg;
k1=2;//开关 k1 为1时,向数1写 为2时，向数2写
k5=1;
k4=1;
fh=ss2;
} k2=k2+1;
}
}
}
//－－－－－－－－清除－－－－－－－
class JianTing_clear implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
jicunqi=(JButton)e.getSource();
vt.add(jicunqi);
k5=1;
k2=1;
k1=1;
k3=1;
k4=1;
str1="0";
str2="0";
fh="";
jg="";
jg_TextField.setText(jg);
vt.clear();
}
}
//----------------等 于 ---------------------
class JianTing_dy implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
jicunqi=(JButton)e.getSource();
vt.add(jicunqi);
yuns();
k1=1; //还原开关k1状态
//str1=jg;
k2=1;
k3=1;//还原开关k3状态
k4=1; //还原开关k4状态
str1=jg; //为7+5=12 +5=17 这种计算做准备
}
}
//----------------小数点 ---------------------
class JianTing_xiaos implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
jicunqi=(JButton)e.getSource();
vt.add(jicunqi);
if(k5==1)
{
String ss2=((JButton)e.getSource()).getText();
if (k1==1)
{
if(k3==1)
{
str1="";
k5=1; //还原开关k5状态
}
str1=str1+ss2;
//k2=1;
k3=k3+1;
//System.out.println(str1);
jg_TextField.setText(str1);//显示
}
else if(k1==2)
{
if (k4==1)
{
str2="";
k5=1; //还原开关k5状态
}
str2=str2+ss2;
//k2=2;
k4=k4+1;
///////////////测试////////////////
jg_TextField.setText(str2);
}
}
k5=k5+1; //
}
}
//注册 监听器
JianTing_dy jt_dy=new JianTing_dy();
JianTing jt= new JianTing();//临听数字键
JianTing_fh jt_fh= new JianTing_fh();//临 听符 号键
JianTing_clear jt_c=new JianTing_clear(); //清除键
JianTing_xiaos jt_xs=new JianTing_xiaos();// 小数点 键
button7.addActionListener(jt);
button8.addActionListener(jt);
button9.addActionListener(jt);
button_chu.addActionListener(jt_fh);
button4.addActionListener(jt);
button5.addActionListener(jt);
button6.addActionListener(jt);
button_cheng.addActionListener(jt_fh);
button1.addActionListener(jt);
button2.addActionListener(jt);
button3.addActionListener(jt);
button_jian.addActionListener(jt_fh);
button0.addActionListener(jt);
button_Dian.addActionListener(jt_xs);
button_dy.addActionListener(jt_dy);
button_jia.addActionListener(jt_fh);
clear_Button.addActionListener(jt_c);
//关闭事件处理程序
frame.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
}
//---------------计 算------------------
public void yuns()
{
double a2;//运算数1
double b2;//运算数2
String c=fh;// 运算符
double jg2=0 ;//结果
if (c.equals(""))
{
//System.out.println("请输入运算符");
jg_TextField.setText("请输入运算符");
}
else
{
System.out.println("str1:"+str1);//调试时 使 用
System.out.println("str2:"+str2);//调试时 使 用
System.out.println("运算符:"+fh);//调试时 使 用
if (str1.equals(".")) //字符串 "." 转换成double型数据时 会出错 所以手工转
str1="0.0";
if (str2.equals("."))
str2="0.0";
a2=Double.valueOf(str1).doubleValue();
b2=Double.valueOf(str2).doubleValue();
System.out.println("double型的a2："+a2); //调试时 使 用
System.out.println("double型的b2："+b2); //调试时 使 用
if (c.equals("+"))
{
jg2=a2+b2;
}
if (c.equals("-"))
{
jg2=a2-b2;
}
if (c.equals("*"))
{
jg2=a2*b2;
}
if (c.equals("/"))
{
if(b2==0)
{
jg2=0;//0000000000000 by 0 cu!
}
else
{
jg2=a2/b2;
}
}
System.out.println("double型a2"+fh+"b2结果："+jg2);
System.out.println();
jg=((new Double(jg2)).toString());
jg_TextField.setText(jg);
}
}
}
相关问答
Q1: 求Java编的简单计算器源代码
package edu.hpu.yyf;
import java.awt.*;
import java.awt.event.*;
public class MyCalculator {
private static double d1 = 0.0;
private static double d2 = 0.0;
private static String s1 = new String("0");
private static String s2 = new String("0");
private static char c1 ='0';
private static void judgec1(TextField text){
switch(c1){
case '+':s2 = String.valueOf(d1+d2);d1=d1+d2;d2=0;text.setText(s2);s2="0";break;
case '-':s2 = String.valueOf(d1-d2);d1=d1-d2;d2=0;text.setText(s2);s2="0";break;
case '*':s2 = String.valueOf(d1*d2);d1=d1*d2;d2=0;text.setText(s2);s2="0";break;
case '/':if(d2==0) {text.setText("0");d1=0;break;}s2 = String.valueOf(d1/d2);d1=d1/d2;d2=0;text.setText(s2);s2="0";break;}
}
public static void main(String [] args){
Frame cclt = new Frame("我的计算器");
cclt.setBounds(300,150,300,265);
cclt.setLayout(null);
final TextField text = new TextField();
text.setBounds(10, 30, 280, 35);
text.setText("0");
text.setEditable(false);
Font font = new Font("", 5, 25);
text.setFont(font);
cclt.add(text);
Panel panel = new Panel();
Font font_1 = new Font("", 5, 20);
panel.setFont(font_1);
panel.setBounds(5, 67, 290, 193);
panel.setBackground(Color.GREEN);
panel.setLayout(new GridLayout(5,4,5,5));
cclt.add(panel);
Button space = new Button();
panel.add(space);
Button Backspace = new Button("Backspace");
Font font_2 = new Font("", 0, 14);
Backspace.setFont(font_2);
panel.add(Backspace);
Button CE = new Button("CE");
panel.add(CE);
Button C = new Button("C");
panel.add(C);
Button seven = new Button("7");
panel.add(seven);
Button eight = new Button("8");
panel.add(eight);
Button nine = new Button("9");
panel.add(nine);
Button but = new Button("/");
panel.add(but);
Button four = new Button("4");
panel.add(four);
Button five = new Button("5");
panel.add(five);
Button six = new Button("6");
panel.add(six);
Button ride = new Button("*");
panel.add(ride);
Button one = new Button("1");
panel.add(one);
Button two = new Button("2");
panel.add(two);
Button three = new Button("3");
panel.add(three);
Button substract = new Button("-");
panel.add(substract);
Button zero = new Button("0");
panel.add(zero);
Button space_1 = new Button(" ");
panel.add(space_1);
Button equal = new Button("=");
panel.add(equal);
Button add = new Button("+");
panel.add(add);
CE.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
d1=0;
d2=0;
s1="0";
s2="0";
c1 ='0';
text.setText("0");
}
});
seven.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.equals("0")) s1="7";
else {text.setText(s1+"7");
s1+="7";}
text.setText(s1);
}
});
eight.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.equals("0")) s1="8";
else {text.setText(s1+"8");
s1+="8";}
text.setText(s1);
}
});
nine.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.equals("0")) s1="9";
else {text.setText(s1+"9");
s1+="9";}
text.setText(s1);
}
});
four.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.equals("0")) s1="4";
else {text.setText(s1+"4");
s1+="4";}
text.setText(s1);
}
});
five.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.equals("0")) s1="5";
else {text.setText(s1+"5");
s1+="5";}
text.setText(s1);
}
});
six.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.equals("0")) s1="6";
else {text.setText(s1+"6");
s1+="6";}
text.setText(s1);
}
});
one.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.equals("0")) s1="1";
else {text.setText(s1+"1");
s1+="1";}
text.setText(s1);
}
});
two.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.equals("0")) s1="2";
else {text.setText(s1+"2");
s1+="2";}
text.setText(s1);
}
});
three.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.equals("0")) s1="3";
else {text.setText(s1+"3");
s1+="3";}
text.setText(s1);
}
});
zero.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(!s1.equals("0")) s1+="0";
text.setText(s1);
}
});
but.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(c1=='0') {d1=Double.parseDouble(s1);if(d1!=0){c1 = '/';}}
else {d2=Double.parseDouble(s1);
judgec1(text);
c1 = '/';}
s1="0";
}
});
substract.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(c1=='0') {d1=Double.parseDouble(s1);if(d1!=0){c1 = '-';}}
else {d2=Double.parseDouble(s1);
judgec1(text);
c1 = '-';}
s1="0";
}
});
ride.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(c1=='0') {d1=Double.parseDouble(s1);if(d1!=0){c1 = '*';}}
else {d2=Double.parseDouble(s1);
judgec1(text);
c1 = '*';}
s1="0";
}
});
add.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(c1=='0') {d1=Double.parseDouble(s1);if(d1!=0){c1 = '+';}}
else {d2=Double.parseDouble(s1);
judgec1(text);
c1 = '+';}
s1="0";
}
});
/* Backspace.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(s1.length()!=0){
if(c1=='0') {text.setText(s1.substring(0, s1.length()-1));s1=s1.substring(0, s1.length()-1);}
else if (c1!='0'!s2.equals("0")) {text.setText(s2.substring(0, s1.length()-1));s2=s2.substring(0, s2.length()-1);}
}}
});*/
equal.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(c1=='0') d1=Double.parseDouble(s1);
else {d2=Double.parseDouble(s1);
judgec1(text);}
s1="0";
c1='0';
}
});
cclt.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
((Frame) e.getComponent()).dispose();
}
});
cclt.setResizable(false);
cclt.setVisible(true);
}
}
我们老师写的哦
Q2: Java计算器源代码
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;public class CaculatorA {
private JFrame jf;
private JButton[] jbs;
private JTextField jtf;
private JButton clear;
private double num1,num2,jieguo;
private char c;
/**
* 构造方法实例化属性
*
*/
public CaculatorA(){
jf=new JFrame("我的计算器v1.0");
jtf=new JTextField(20);
clear=new JButton("clear");
jbs=new JButton[16];
String str="123+456-789*0./=";
for(int i=0; istr.length(); i++){
jbs[i]=new JButton(str.charAt(i)+"");
}
init();
addEventHandler();
// setFont();
// setColor();
showMe();
}
/**
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