📄 calclulator.java
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/**
*计算器的应用bete2版
*/
import java.awt.*;
import java.awt.event.*;
class calclulator{
public static void main(String args[]){
proce pr=new proce();
}
}
class proce extends Frame implements ActionListener
{
MenuBar menubar1;
Menu menufile;
Menu menuedit;
Menu menuhelp;
MenuItem menufileopen;
MenuItem menufilesave;
MenuItem menufileclose;
MenuItem menufileexit;
MenuItem menucopy;
MenuItem menupaste;
MenuItem menudelete;
MenuItem menuhelpabout;
MenuItem menuhelpa;
Button button0=new Button("0");
Button button1=new Button("1");
Button button2=new Button("2");
Button button3=new Button("3");
Button button4=new Button("4");
Button button5=new Button("5");
Button button6=new Button("6");
Button button7=new Button("7");
Button button8=new Button("8");
Button button9=new Button("9");
Button button10=new Button(".");
Button button11=new Button("+");
Button button12=new Button("—");
Button button13=new Button("X");
Button button14=new Button("/");
Button button15=new Button("乘方");
Button button16=new Button("开方");
Button button17=new Button("=");
Button button18=new Button("C");
TextField result=new TextField("",80);
Panel pan1=new Panel();
Panel pan2=new Panel();
Panel pan3=new Panel();
Panel pan4=new Panel();
Panel pan5=new Panel();
Panel pan0=new Panel();
Panel pan6=new Panel();
Panel manpan=new Panel();
Panel manpan0=new Panel();
Label lab=new Label();
int oper=0,peroper=0,newoper=0;//记录运算符
double num1=0.0,num2=0.0; //记录数字
boolean flag=false,flag0=false,hasoper=false;
boolean flagnum1=true,flagnum2=false;
String num="",numble="";
String str="";
//以上为公共变量；方法
final int AND=11,
SUB=12,
MULT=13,
DIV=14,
POW=15,
SQRT=16,
EQUAL=17,
INS=18;//小数点
public proce()
{
super("计算器 Bete2版");
this.setLayout(new FlowLayout());
setBackground(Color.PINK);
result.setEditable(false);
button0.setBackground(Color.green);
button17.setBackground(Color.orange);
button17.setFont(new Font("Courier",Font.PLAIN,16));
button11.setFont(new Font("Courier",Font.PLAIN,16));
button10.setFont(new Font("Courier",Font.PLAIN,19));
button18.setFont(new Font("Courier",Font.PLAIN,16));
pan0.setLayout(new GridLayout(7,1,3,1));
result.setBackground(Color.lightGray);
pan1.setLayout(new GridLayout(1,4,5,1));
pan2.setLayout(new GridLayout(1,4,5,1));
pan3.setLayout(new GridLayout(1,4,5,1));
pan4.setLayout(new GridLayout(1,4,5,1));
pan5.setLayout(new GridLayout(1,4,5,1));
//manpan0.setLayout(new GridLayout(2,1));
//manpan.setLayout(new FlowLayout());
menubar1=new MenuBar();
menufile=new Menu("文件");
menuedit=new Menu("编辑");
menuhelp=new Menu("帮助");
menufileopen=new MenuItem("打开");
menufilesave=new MenuItem("保存");
menufileclose=new MenuItem("关闭");
menufileexit=new MenuItem("退出");
menupaste=new MenuItem("粘贴");
menudelete=new MenuItem("删除");
menucopy=new MenuItem("复制");
menuhelpabout=new MenuItem("使用帮助");
menuhelpa=new MenuItem("关于");
//贴加监听；
handle ha=new handle(this);
menufileopen.addActionListener(this);
menufilesave.addActionListener(this);
menufileclose.addActionListener(this);
menufileexit.addActionListener(this);
menupaste.addActionListener(this);
menudelete.addActionListener(this);
menucopy.addActionListener(this);
menuhelpabout.addActionListener(ha);
menuhelpa.addActionListener(ha);
//添加到菜单上；
menufile.add(menufileopen);
menufile.add(menufilesave);
menufile.add(menufileclose);
menufile.add(menufileexit);
menuedit.add(menupaste);
menuedit.add(menudelete);
menuedit.add(menucopy);
menuhelp.add(menuhelpabout);
menuhelp.add(menuhelpa);
//把菜单添加到菜单栏上；
menubar1.add(menufile);
menubar1.add(menuedit);
menubar1.add(menuhelp);
//把菜单栏设置于frame上；
this.setMenuBar(menubar1);
button0.addActionListener(this);
button1.addActionListener(this);
button2.addActionListener(this);
button3.addActionListener(this);
button4.addActionListener(this);
button5.addActionListener(this);
button6.addActionListener(this);
button7.addActionListener(this);
button8.addActionListener(this);
button9.addActionListener(this);
button10.addActionListener(this);
button11.addActionListener(this);
button12.addActionListener(this);
button13.addActionListener(this);
button14.addActionListener(this);
button15.addActionListener(this);
button16.addActionListener(this);
button17.addActionListener(this);
button18.addActionListener(this);
pan0.add(result);
pan0.add(lab);
pan1.add(button0);
pan1.add(button1);
pan1.add(button2);
pan1.add(button3);
pan0.add(pan1);
pan2.add(button4);
pan2.add(button5);
pan2.add(button6);
pan2.add(button7);
pan0.add(pan2);
pan3.add(button8);
pan3.add(button9);
pan3.add(button10);
pan3.add(button11);
pan0.add(pan3);
pan4.add(button12);
pan4.add(button13);
pan4.add(button14);
pan4.add(button15);
pan0.add(pan4);
pan5.add(button16);
pan5.add(button17);
pan5.add(button18);
pan0.add(pan5);
//pan6.add(result);
//manpan.add(pan6);
//manpan0.add(manpan,0);
//manpan0.add(pan0,1);
this.add(pan0);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
setSize(600,290);
//this.pack();
//this.show();
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{ /*假如信息不是来自于计算符号；则对显示框清屏；*/
if(e.getSource()!=button11&&e.getSource()!=button12&&e.getSource()!=button13&&e.getSource()!=button14&&e.getSource()!=button15
&&e.getSource()!=button16&&e.getSource()!=button17&&e.getSource()!=menufileexit&&e.getSource()!=button18){ //清屏完毕;
if(e.getSource()==button0){
initstar();
numble="0";
flag=false;
peroperate(numble); //peroperate()被调用;
}
else if(e.getSource()==button1){
initstar();
numble="1";
flag=false;
peroperate(numble);
}
else if(e.getSource()==button2){
initstar();
numble="2";
flag=false;
peroperate(numble);
}
else if(e.getSource()==button3){
initstar();
numble="3";
flag=false;
peroperate(numble);
}
else if(e.getSource()==button4){
initstar();
numble="4";
flag=false;
peroperate(numble);
}
else if(e.getSource()==button5){
initstar();
numble="5";
flag=false;
peroperate(numble);
}
else if(e.getSource()==button6){
initstar();
numble="6";
flag=false;
peroperate(numble);
}
else if(e.getSource()==button7){
initstar();
numble="7";
flag=false;
peroperate(numble);
}
else if(e.getSource()==button8){
initstar();
numble="8";
flag=false;
peroperate(numble);
}
else if(e.getSource()==button9){
initstar();
numble="9";
flag=false;
peroperate(numble);
}
else if(e.getSource()==button10){
initstar();
numble=".";
flag=false;
peroperate(numble);
}
}
else if(e.getSource()==button11){
oper=AND;
flag=true;
answerto(AND); //answerto()被调用;
peroper=oper;
showoper("+");
}
else if(e.getSource()==button12){
oper=SUB;
flag=true;
showoper("-");
answerto(SUB);
peroper=oper;
}
else if(e.getSource()==button13){
oper=MULT;
flag=true;
showoper("*");
answerto(MULT);
peroper=oper;
}
else if(e.getSource()==button14){
oper=DIV;
flag=true;
showoper("/");
answerto(DIV);
peroper=oper;
}
else if(e.getSource()==button15){
oper=POW;
flag=true;
showoper("POW");
answerto(POW);
peroper=oper;
}
else if(e.getSource()==button16){
oper=SQRT;//System.out.println("LLfL");
flag=true;
showoper("SQRT");
answerto(SQRT);
peroper=oper;
}
else if(e.getSource()==button17){
oper=EQUAL;//System.out.println("LLL");
showoper("=");
answerto(EQUAL);
peroper=oper;
}
else if(e.getSource()==menufileexit){
System.exit(0);
}
else if(e.getSource()==button18){
initstar();
show("");
}
}
public void answerto(int oper) //calclutor()被调用 showoper()被调用
{
flag=true;flagnum1=false;
flagnum2=true;
if(oper == EQUAL){
String ans="";
ans=Double.toString(calclutor(peroper,num1,num2));
showoper(ans);//System.out.println(ans);
num1=num2=0.0; //执行完一次计算加显示之后清空num1,num2;
flag0=true;//已按下"=";
hasoper=true;
}
else{
peroper=oper;
flag0=false;//没有按下"="
}
}
public double calclutor(int peroper,double num1,double num2)
{//oper为计算的代码；num1,num2为输入的数字;
double answer=0.0;
switch(peroper)
{
case AND://"+"
answer=num1+num2;//System.out.println(num1);
break;
case SUB://"-"
answer=num1-num2;
break;
case MULT://"*"
answer=num1*num2;
break;
case DIV://"/"
answer=num1/num2;
break;
case POW://"乘方"
answer=Math.pow(num1,num2);
break;
case SQRT://"开方"
answer=Math.sqrt(num1);
break;
default:
break;
}
//计算之后清空 num1 , num2;
return (answer);
}
public void show(String str)//显示区用textField:1+3=4;(result);
{
result.setFont(new Font("Courier",Font.PLAIN,16));
result.setText(str);
}
void showoper(String operstr)//显示区参数传入方法; show();被调用
{ //传入的都为string格式;
if(flag){
num="";
flag=false;
}
if(flag&&peroper==EQUAL)//第二次计算之前清空显示区；
{
str="";
show(str);
}
else
{
str=str.concat(operstr);
show(str);//同类中的方法可以被随便调用；
}
}
public void peroperate(String numble){ //对数字与小数点的先前处理；numble+point
num=num.concat(numble); //System.out.println("first ::the num:"+num+"ok"); //数字合成完成；
showoper(numble);
if(flagnum1){ // System.out.println("the num:"+num+"ok");
char[] ch=new char[1];
num.getChars(0,1,ch,0);
String sr=new String(ch);
if(sr.equals(".")){
num="0"+num;//System.out.println(num);
}num1=Double.valueOf(num).doubleValue();
//System.out.println("num1");
}
else if(flagnum2){
char[] ch=new char[1];
num.getChars(0,1,ch,0);
String sr=new String(ch);
if(sr.equals(".")){
num="0"+num;//System.out.println(num);
}
num2=Double.valueOf(num).doubleValue();
}
numble=""; //数字处理完成已生成: num1 和 num2;
}
void initstar()
{
if(hasoper)
{
oper=0;peroper=0;newoper=0;
num1=0.0;num2=0.0;
flag=false;flag0=false;
num="";numble="";
str="";num1=num2=0.0;
hasoper=false;//System.out.println("the second");
show(str);flagnum1=true;flagnum2=false;
}
}
}
class handle implements ActionListener //监听类 //用来实例化主程序
{
proce pf;
public handle(proce pf)
{
this.pf=pf;
}
public void actionPerformed(ActionEvent e)
{
dial da=new dial(pf,"关于");da.setVisible(true);
//da.show();
}
//pf.repaint();
}
class dial extends Dialog implements ActionListener
{
String choice0="";
dial(Frame parent,String title)
{
super(parent,title,false);
setLayout(new FlowLayout(FlowLayout.RIGHT,10,10));
setSize(300,200);
choice0=title;
Button b;
add(b=new Button("确定"));
//b.setBounds(20,20,100,100);
b.addActionListener(this);
this.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
dispose();
}
}
);
}
public void actionPerformed(ActionEvent e)
{
dispose();
}
public void paint(Graphics g)
{
if(choice0.equals("关于"))
{
g.drawString("计算器 Bete2 版 " ,40,90);
g.drawString(" 由 Leniux 制 作…… \n\n ",50,110);
g.drawString(" …… 版 权 所 有",100,130);
}
else if(choice0.equals("帮助"))
{
g.drawString(" 无帮助",20,140);
}
}
}
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