JButton c[]={new JButton("7"), new JButton("8"), new JButton("9"), new JButton("/"), new JButton("sqrt"), new JButton("4"), new JButton("5"), new JButton("6"), new JButton("*"), new JButton("%"), new JButton("1"), new JButton("2"), new JButton("3"), new JButton("-"), new JButton("1/x"), new JButton("0"), new JButton("+/-"), new JButton("."), new JButton("+"), new JButton("=")};
public static double result (double a, double b, String ) {
if(.equals("+")) {
add(a,b);
} else if () {}
}
package work;import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Calculator
{
public static void main(String[] args)
{
CalculatorFrame frame = new CalculatorFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(200,200);
frame.setVisible(true);
}
}
class CalculatorFrame extends JFrame
{
public CalculatorFrame()
{
setTitle("Calculator");
CalculatorPanel panel = new CalculatorPanel();
add(panel);
pack();
}
}
class CalculatorPanel extends JPanel
{
private JLabel display;
private JPanel panel;
private double result;
private String lastCommand;
private boolean start;
public CalculatorPanel()
{
setLayout(new BorderLayout());
result = 0;
lastCommand = "=";
start = true;
display = new JLabel("0",JLabel.RIGHT);
display.setEnabled(false);
add(display, BorderLayout.NORTH);
ActionListener insert = new InsertAction();
ActionListener command = new CommandAction();
panel = new JPanel();
panel.setLayout(new GridLayout(4, 4));
addButton("7", insert);
addButton("8", insert);
addButton("9", insert);
addButton("+", command);
addButton("4", insert);
addButton("5", insert);
addButton("6", insert);
addButton("-", command);
addButton("1", insert);
addButton("2", insert);
addButton("3", insert);
addButton("*", command);
addButton("0", insert);
addButton(".", insert);
addButton("=", command);
addButton("/", command);
add(panel, BorderLayout.CENTER);
}
private void addButton(String label, ActionListener listener)
{
JButton button = new JButton(label);
button.addActionListener(listener);
panel.add(button);
}
private class InsertAction implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
String input = event.getActionCommand();
if (start)
{
display.setText("");
start = false;
}
display.setText(display.getText() + input);
}
}
private class CommandAction implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
String command = event.getActionCommand();
if (start)
{
if (command.equals("-"))
{
display.setText(command);
start = false;
}
else
lastCommand = command;
}
else
{
calculate(Double.parseDouble(display.getText()));
lastCommand = command;
start = true;
}
}
}
public void calculate(double x)
{
if (lastCommand.equals("+")) result += x;
else if (lastCommand.equals("-")) result -= x;
else if (lastCommand.equals("*")) result *= x;
else if (lastCommand.equals("/")) result /= x;
else if (lastCommand.equals("=")) result = x;
display.setText("" + result);
}
}
import java.awt.event.*;
import javax.swing.*;/**********************Java计算器 主类*********************/
public class SunnyCalculator implements ActionListener {
JFrame f;
JMenu mEdit;
JMenu mView;
JMenu mHelp;
JMenuItem mCopy;
JMenuItem mPaste;
JTextField tResult;
JButton bNumber;
JButton bOperator;
JButton bOther;
JButton bM;
boolean isDouble=false;//是否为实数
int opFlag=-1;
static double t1=0,t2=0,t3=0,result=0;
static int opflag1=-1,opflag2=-1,flag=0,resflag=1;
int preOp,currentOp=0;//标准位
double op1=0,op2=0;//操作数
double n3;
StringBuffer buf=new StringBuffer(20);
StringBuffer copyBoard=new StringBuffer(20);//剪贴板
StringBuffer memory=new StringBuffer(20);//M系列
StringBuffer str=new StringBuffer();
//Java计算器 构造器
public SunnyCalculator()
{
f = new JFrame("Sunny计算器_杨梅树的盔甲");
Container contentPane = f.getContentPane();
/**************************Java计算器 菜单的创建*****************************/
JMenuBar mBar = new JMenuBar();
mBar.setOpaque(true);
mEdit = new JMenu("编辑(E)");
mEdit.setMnemonic(KeyEvent.VK_E);
mCopy = new JMenuItem("复制(C)");
mEdit.add(mCopy);
mPaste = new JMenuItem("粘贴(P)");
mEdit.add(mPaste);
mView = new JMenu("查看(V)");
mView.setMnemonic(KeyEvent.VK_V);
mView.add(new JMenuItem("标准型"));
mView.add(new JMenuItem("科学型"));
mView.addSeparator();
mView.add(new JMenuItem("查看分组"));
mHelp = new JMenu("帮助(H)");
mHelp.setMnemonic(KeyEvent.VK_H);
mHelp.add(new JMenuItem("帮助主题"));
mHelp.addSeparator();
mHelp.add(new JMenuItem("关于计算器"));
mBar.add(mEdit);
mBar.add(mView);
mBar.add(mHelp);
f.setJMenuBar(mBar);
contentPane.setLayout(new BorderLayout());
JPanel pTop = new JPanel();
tResult = new JTextField("0.",26);
tResult.setHorizontalAlignment(JTextField.RIGHT);
tResult.setEditable(false);
pTop.add(tResult);
contentPane.add(pTop,BorderLayout.NORTH);
JPanel pBottom = new JPanel();
pBottom.setLayout(new BorderLayout());
JPanel pLeft = new JPanel();
pLeft.setLayout(new GridLayout(5,1,3,3));
bM = new JButton(" ");
bM.setEnabled(false);
pLeft.add(bM); /*************************Java计算器 功能键定义***************************/
bOther = new JButton("MC");
bOther.addActionListener(this);
bOther.setForeground(Color.red);
bOther.setMargin(new Insets(3,2,3,2));
pLeft.add(bOther); bOther = new JButton("MR");
bOther.addActionListener(this);
bOther.setForeground(Color.red);
bOther.setMargin(new Insets(3,2,3,2));
pLeft.add(bOther); bOther = new JButton("MS");
bOther.addActionListener(this);
bOther.setForeground(Color.red);
bOther.setMargin(new Insets(3,2,3,2));
pLeft.add(bOther); bOther = new JButton("M+");
bOther.addActionListener(this);
bOther.setForeground(Color.red);
bOther.setMargin(new Insets(3,2,3,2));
pLeft.add(bOther); pBottom.add(pLeft,BorderLayout.WEST);
JPanel pRight = new JPanel();
pRight.setLayout(new BorderLayout());
JPanel pUp = new JPanel();
pUp.setLayout(new GridLayout(1,3,3,0)); bOther = new JButton("BackSpace");
bOther.addActionListener(this);
bOther.setForeground(Color.red);
bOther.setMargin(new Insets(3,0,3,5));
pUp.add(bOther); bOther = new JButton("CE");
bOther.addActionListener(this);
bOther.setForeground(Color.red);
pUp.add(bOther); bOther = new JButton("C");
bOther.addActionListener(this);
bOther.setForeground(Color.red);
pUp.add(bOther); /***************************Java计算器 数字键盘区定义**************************/
JPanel pDown = new JPanel();
pDown.setLayout(new GridLayout(4,5,3,2));
bNumber = new JButton("7");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
pDown.add(bNumber);
bNumber = new JButton("8");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
pDown.add(bNumber);
bNumber = new JButton("9");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
pDown.add(bNumber);
bOperator = new JButton("/");
bOperator.setForeground(Color.red);
bOperator.addActionListener(this);
bOperator.setMargin(new Insets(3,0,3,0));
pDown.add(bOperator);
bOperator = new JButton("sqrt");
bOperator.addActionListener(this);
bOperator.setForeground(Color.red);
bOperator.setMargin(new Insets(3,0,3,0));
pDown.add(bOperator);
bNumber = new JButton("4");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
bNumber.setHorizontalTextPosition(JButton.LEFT);
pDown.add(bNumber);
bNumber = new JButton("5");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
pDown.add(bNumber);
bNumber = new JButton("6");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
pDown.add(bNumber);
bOperator = new JButton("*");
bOperator.setForeground(Color.red);
bOperator.addActionListener(this);
bOperator.setMargin(new Insets(3,3,3,3));
pDown.add(bOperator);
bOperator = new JButton("%");
bOperator.setForeground(Color.blue);
bOperator.addActionListener(this);
bOperator.setMargin(new Insets(3,3,3,3));
pDown.add(bOperator);
bNumber = new JButton("1");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
pDown.add(bNumber);
bNumber = new JButton("2");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
pDown.add(bNumber);
bNumber = new JButton("3");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
pDown.add(bNumber);
bOperator = new JButton("-");
bOperator.setForeground(Color.red);
bOperator.addActionListener(this);
bOperator.setMargin(new Insets(3,3,3,3));
pDown.add(bOperator);
bOperator = new JButton("1/x");
bOperator.setForeground(Color.blue);
bOperator.addActionListener(this);
pDown.add(bOperator);
bNumber = new JButton("0");
bNumber.setForeground(Color.blue);
bNumber.addActionListener(this);
bNumber.setMargin(new Insets(3,3,3,3));
pDown.add(bNumber);
bOperator = new JButton("+/-");
bOperator.setForeground(Color.blue);
bOperator.addActionListener(this);
bOperator.setMargin(new Insets(3,3,3,3));
pDown.add(bOperator);
bOperator = new JButton(".");
bOperator.setForeground(Color.blue);
bOperator.addActionListener(this);
bOperator.setMargin(new Insets(3,3,3,3));
pDown.add(bOperator);
bOperator = new JButton("+");
bOperator.setForeground(Color.blue);
bOperator.addActionListener(this);
bOperator.setMargin(new Insets(3,3,3,3));
pDown.add(bOperator);
bOperator = new JButton("=");
bOperator.setForeground(Color.blue);
bOperator.addActionListener(this);
bOperator.setMargin(new Insets(3,3,3,3));
pDown.add(bOperator);
pRight.add(pUp,BorderLayout.NORTH);
pRight.add(pDown,BorderLayout.SOUTH);
pBottom.add(pRight,BorderLayout.EAST);
contentPane.add(pBottom,BorderLayout.SOUTH);
f.setSize(new Dimension(320,256));
f.setResizable(false);
f.setVisible(true);
f.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
}
/************************Java计算器 计算方法区***************************/
public void actionPerformed(ActionEvent e)
{
String s = e.getActionCommand();
if(s.equals("复制(C)"))
{
String temp = tResult.getText().trim();
copyBoard.replace(0, copyBoard.length(), temp);
mPaste.setEnabled(true);
}
else if(s.equals("粘贴(p)"))
{
tResult.setText(copyBoard.toString());
}
else if(s.equals("CE"))
{
//如果是CE则清除文本框
tResult.setText("0.");
}
else if(s.equals("BackSpace"))
{
if(!tResult.getText().trim().equals("0."))
{
//如果文本框中有内容
if(str.length()!=1 && str.length()!=0)
{
tResult.setText(str.delete(str.length()-1,str.length()).toString());
}
else
{
tResult.setText("0.");
str.setLength(0);
}
}
op2 = Double.parseDouble(tResult.getText().trim());
}
else if(s.equals("C"))
{
//如果是C删除当前计算
tResult.setText("0.");
op1 = op2 = 0;
str.replace(0, str.length(), " ");
preOp = currentOp = 0;
}
else if(s.equals("MC"))
{
//如果是MC则清除缓冲区
String temp = "";
memory.replace(0, memory.length(), temp);
bM.setText(" ");
}
else if(s.equals("MR"))
{
//如果按键为MR则恢复缓冲区的数到文本框
tResult.setText(memory.toString());
}
else if(s.equals("MS"))
{
//如果按键为MS则将文本框的数存入缓冲区
String s1 = tResult.getText().trim();
memory.replace(0, memory.length(), s1);
bM.setText("M");
}
else if(s.equals("M+"))
{
//如果按键为MS则将文本框值与缓冲区的数相加但不显示结果
String temp1 = tResult.getText().trim();
double dtemp = Double.parseDouble(temp1);
String temp2 = memory.toString();
dtemp += Double.parseDouble(temp2);
temp1 = String.valueOf(dtemp);
memory.replace(0, memory.length(), temp1);
}
else if(s.equals("1/x"))
{
//如果按键为1/x则将文本框中的数据为它的倒数
String temp = tResult.getText().trim();
double dtemp = Double.parseDouble(temp);
tResult.setText(""+1/dtemp);
}
else if(s.equals("sqrt"))
{
//如果按键为sqrt则将文本框中的内容求平方根
String temp = tResult.getText().trim();
double dtemp = Double.parseDouble(temp);
tResult.setText(""+Math.sqrt(dtemp));
}
else if(s.equals("+"))
{
str.setLength(0);
if(currentOp==0)
{
preOp = currentOp = 1;
op2 = 0;
tResult.setText(""+op1);
}
else
{
currentOp = preOp;
preOp = 1;
switch(currentOp){
case 1:
op1 += op2;
tResult.setText(""+op1);
break;
case 2:
op1 -= op2;
tResult.setText(""+op1);
break;
case 3:
op1 *= op2;
tResult.setText(""+op1);
break;
case 4:
op1 /= op2;
tResult.setText(""+op1);
break;
}
}
}
else if(s.equals("-")){
str.setLength(0);
if(currentOp==0)
{
preOp=currentOp=2;//op1=op2;op2=0;
tResult.setText(""+op1);
}
else
{
currentOp =preOp;
preOp =2;
switch(currentOp){
case 1:op1=op1+op2;tResult.setText(""+op1);break;
case 2:op1=op1-op2;tResult.setText(""+op1);break;
case 3:op1=op1*op2;tResult.setText(""+op1);break;
case 4:op1=op1/op2;tResult.setText(""+op1);break;
}
}
}
else if(s.equals("*"))//*
{
str.setLength(0);
if(currentOp==0)
{
preOp=currentOp=3;//op1=op2;op2=1;
tResult.setText(""+op1);//op1=op2;
}
else
{
currentOp =preOp;
preOp =3;
switch(currentOp){
case 1:op1=op1+op2;tResult.setText(""+op1);break;
case 2:op1=op1-op2;tResult.setText(""+op1);break;
case 3:op1=op1*op2;tResult.setText(""+op1);break;
case 4:op1=op1/op2;tResult.setText(""+op1);break;
}
}
}
else if(s.equals("/"))// /
{
str.setLength(0);
if(currentOp==0)
{
preOp=currentOp=4;//op2=1;
tResult.setText(""+op1);//op1=op2;
}
else
{
currentOp =preOp;
preOp =4;
switch(currentOp){
case 1:op1=op1+op2;tResult.setText(""+op1);break;
case 2:op1=op1-op2;tResult.setText(""+op1);break;
case 3:op1=op1*op2;tResult.setText(""+op1);break;
case 4:op1=op1/op2;tResult.setText(""+op1);break;
}
}
}
else if(s.equals("="))// =
{
if(currentOp==0)
{
str.setLength(0);
tResult.setText(""+op2);
}
else
{
str.setLength(0);
currentOp =preOp;
switch(currentOp){
case 1:op1=op1+op2;tResult.setText(""+op1);break;
case 2:op1=op1-op2;tResult.setText(""+op1);break;
case 3:op1=op1*op2;tResult.setText(""+op1);break;
case 4:op1=op1/op2;tResult.setText(""+op1);break;
}
currentOp=0;
op2=0;
}
}
else if(s.equals("."))
{
isDouble=true;
if(tResult.getText().trim().indexOf('.')!=-1);
else {
if(tResult.getText().trim().equals("0")) {
str.setLength(0);
tResult.setText((str.append("0"+s)).toString());
}
//else if(tResult.getText().trim().equals("")){}//如果初时显示为空则不做任何操作
else {
tResult.setText((str.append(s)).toString());
}
}
}
else if(s.equals("0"))//如果选择的是"0"这个数字键
{
if(tResult.getText().trim().equals("0.")){}
else{
tResult.setText(str.append(s).toString());
op2=Double.parseDouble(tResult.getText().trim());
}
}
else{
tResult.setText(str.append(s).toString());
op2=Double.parseDouble(tResult.getText().trim());
if(currentOp==0)
op1=op2;
}
}//end actionPerformed
public static void main(String[] args) {
new SunnyCalculator();
}
}
ackage ziji;
//按等号连加可以实现（正数） 减乘除不可以 一个数除以另一个数后 结果为小数 用Back那个键删除后 在小数点后接着继续加数字
import java.awt.BorderLayout;
import java.awt.Button;
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.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JPanel;
import javax.swing.JTextField;public class text2 extends JFrame{
JTextField textField;
static String str=" ";
double a1,a2; //a1是计算前的值。a2是计算后的值。
double resl; //存放结果的变量
static String temp; //判断的临时变量
static boolean b=false; //判断的临时变量
public text2(){
Container container=getContentPane();
JMenuBar menu=new JMenuBar();
JMenu file=new JMenu("编辑(E)");
JMenu file1=new JMenu("查看(U)");
JMenu file2=new JMenu("帮助(H)");
JButton bt=new JButton("Backspace");
JButton bt1=new JButton("CE");
JButton bt2=new JButton("C");
JButton c[]={new JButton("7"),
new JButton("8"),
new JButton("9"),
new JButton("/"),
new JButton("sqrt"),
new JButton("4"),
new JButton("5"),
new JButton("6"),
new JButton("*"),
new JButton("%"),
new JButton("1"),
new JButton("2"),
new JButton("3"),
new JButton("-"),
new JButton("1/x"),
new JButton("0"),
new JButton("+/-"),
new JButton("."),
new JButton("+"),
new JButton("=")};
file.add("复制(C)");
file.add("粘贴(V)");
file1.add("标准型(T)");
file1.add("标准型(S)");
file1.addSeparator();
file1.add("数字分组(I)");
file2.add("帮助主题(H)");
file2.addSeparator();
file2.add("关于计算机(A)");
menu.add(file);
menu.add(file1);
menu.add(file2);
JPanel jian=new JPanel();
jian.setLayout(new GridLayout(4,5,3,3));
for(int i=0;i<c.length;i++){
jian.add(c[i]);}
JPanel a=new JPanel();
JPanel g=new JPanel();g.setLayout(new GridLayout(1,3));
g.add(bt);
g.add(bt1);
g.add(bt2);
textField = new JTextField("0",35);
textField.setHorizontalAlignment(JTextField.RIGHT);
a.add(textField);
a.add(g);
container.setLayout(new BorderLayout());
container.add(menu,BorderLayout.NORTH);
container.add(a);
container.add(jian,BorderLayout.SOUTH);
bt2.addActionListener(new ActionListener(){ //为C键设置监听
public void actionPerformed(ActionEvent e) {
textField.setText("0");
b=false;
}
});
bt.addActionListener(new ActionListener(){//为Backspace键设置监听
public void actionPerformed(ActionEvent e) {
if(textField.getText()!="0"&&textField.getText().length()!=1){
b=false;
textField.setText(textField.getText().substring(0,textField.getText().length()-1));
}else{
textField.setText("0");
}
}
});
class Action implements ActionListener{ //为数字按钮设置监听 public void actionPerformed(ActionEvent e) {
if(textField.getText().equals("0")){
textField.setText(e.getActionCommand());
}else if(b==true){
// str+=e.getActionCommand();
// str.trim();
textField.setText(e.getActionCommand());
b=false;
}
else{
String st=textField.getText()+e.getActionCommand();
textField.setText(st);
}
}
}
Action action=new Action (); c[0].addActionListener(action);
c[1].addActionListener(action);
c[2].addActionListener(action);
c[5].addActionListener(action);
c[6].addActionListener(action);
c[7].addActionListener(action);
c[10].addActionListener(action);
c[11].addActionListener(action);
c[12].addActionListener(action);
c[15].addActionListener(action);
c[17].addActionListener(new ActionListener(){//为点号设置监听 public void actionPerformed(ActionEvent e) {
if(!textField.getText().endsWith(".")&&!(textField.getText().contains(".")))
textField.setText(textField.getText()+".");
}
});
c[16].addActionListener(new ActionListener(){//为+/-号设置监听 public void actionPerformed(ActionEvent e) {
if(textField.getText()!="0"){
double a=-Double.valueOf(textField.getText());
textField.setText(String.valueOf(a));
}
}
});
c[18].addActionListener(new ActionListener(){//为加号设置监听 public void actionPerformed(ActionEvent e) {
b=true;
temp="+";
a1=Double.valueOf(textField.getText());
System.out.println("a1="+a1);
}});
c[13].addActionListener(new ActionListener(){//为减号设置监听
public void actionPerformed(ActionEvent e) {
b=true;
temp="-";
a1=Double.valueOf(textField.getText());
System.out.println(a1);
}});
c[8].addActionListener(new ActionListener(){//为乘号设置监听
public void actionPerformed(ActionEvent e) {
b=true;
a1=Double.valueOf(textField.getText());
temp="*";
}});
c[3].addActionListener(new ActionListener(){//为除号设置监听
public void actionPerformed(ActionEvent e) {
b=true;
a1=Double.valueOf(textField.getText());
temp="/";
}});
c[19].addActionListener(new ActionListener(){ //为=号注册监听器 public void actionPerformed(ActionEvent e) {
b=true;
double a2=Double.valueOf(textField.getText());
System.out.println("a2="+a2);
if(temp=="+"){
textField.setText(String.valueOf(a1+a2));
a1=a2; //保证连续按=号输出正确结果
}
if(temp=="-"){
textField.setText(String.valueOf(a1-a2));}
if(temp=="*"){
textField.setText(String.valueOf(a1*a2));}
if(temp=="/"){
textField.setText(String.valueOf(a1/a2));}
}
});
setTitle("计算器 明明版");
setSize(400, 250);
setVisible(true) ;
setResizable(false);
} public static void main(String args[]) {
text2 a=new text2 ();
}
}