java編寫的計算器
1. 用java編寫一個計算器
importjava.awt.BorderLayout;
importjava.awt.Color;
importjava.awt.GridLayout;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjavax.swing.ImageIcon;
importjavax.swing.JButton;
importjavax.swing.JFrame;
importjavax.swing.JPanel;
importjavax.swing.JTextField;
importjavax.swing.SwingConstants;
{
/**
*
*/
=1L;
Resultresult=newResult();//定義text的面板
Number_Keynumber_key=newNumber_Key();//定義按鈕面板
//當點擊按鈕+、-、*、/時，com=true
booleancom=false;
//當i=0時說明是我們第一次輸入，字元串text不會累加
inti=0;
//存放text的內容
Stringtext="";
//存放點擊按鈕+、-、*、/之前的數值
doubledefbutton=0;
//+、-、*、/的代號分別為1，2，3，4
intsymbol=0;
//構造函數
Jisuanqi(){
super("WangJiao");//設定標題
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//設定關閉窗體時退出程序
JPanelpane=newJPanel();//定義主面板
pane.setLayout(newBorderLayout());
setBounds(380,220,30,80);//前兩個參數是在屏幕上顯示的坐標，後兩個是大小
//替換圖標
ImageIconicon=newImageIcon("F:1.GIF");
//Jisuanqi.class.getResource("APPLE.GIF")
//);
setIconImage(icon.getImage());
pane.add(result,BorderLayout.NORTH);
pane.add(number_key,BorderLayout.CENTER);
pane.add(number_key.equal,BorderLayout.SOUTH);
number_key.one.addActionListener(this);//對1按鈕添加監聽事件
number_key.two.addActionListener(this);//對2按鈕添加監聽事件
number_key.three.addActionListener(this);//對3按鈕添加監聽事件
number_key.four.addActionListener(this);//對4按鈕添加監聽事件
number_key.five.addActionListener(this);//對5按鈕添加監聽事件
number_key.six.addActionListener(this);//對6按鈕添加監聽事件
number_key.seven.addActionListener(this);//對7按鈕添加監聽事件
number_key.eight.addActionListener(this);//對8按鈕添加監聽事件
number_key.nine.addActionListener(this);//對9按鈕添加監聽事件
number_key.zero.addActionListener(this);//對0按鈕添加監聽事件
number_key.ce.addActionListener(this);//對置零按鈕添加監聽事件
number_key.plus.addActionListener(this);//對+按鈕添加監聽事件
number_key.equal.addActionListener(this);//對=按鈕添加監聽事件
number_key.sub.addActionListener(this);//對-按鈕添加監聽事件
number_key.mul.addActionListener(this);//對*按鈕添加監聽事件
number_key.div.addActionListener(this);//對/按鈕添加監聽事件
number_key.point.addActionListener(this);//對.按鈕添加監聽事件
setContentPane(pane);
pack();//初始化窗體大小為正好盛放所有按鈕
}
//各個按鈕觸發的事件
publicvoidactionPerformed(ActionEvente){
/*
*如果是點擊數字按鈕那麼先要判斷是否在此之前點擊了+、-、*、/、=，如果是那麼com=true如果沒有com=
*false;或者是否點擊數字鍵，如果是i=1,如果沒有i=0;
*/
if(e.getSource()==number_key.one){
if(com||i==0){
result.text.setText("1");
com=false;
i=1;
}else{
text=result.text.getText();
result.text.setText(text+"1");
}
}elseif(e.getSource()==number_key.two){
if(com||i==0){
result.text.setText("2");
com=false;
i=1;
}else{
text=result.text.getText();
result.text.setText(text+"2");
}
}elseif(e.getSource()==number_key.three){
if(com||i==0){
result.text.setText("3");
com=false;
i=1;
}else{
text=result.text.getText();
result.text.setText(text+"3");
}
}elseif(e.getSource()==number_key.four){
if(com||i==0){
result.text.setText("4");
com=false;
i=1;
}else{
text=result.text.getText();
result.text.setText(text+"4");
}
}elseif(e.getSource()==number_key.five){
if(com||i==0){
result.text.setText("5");
com=false;
i=1;
}else{
text=result.text.getText();
result.text.setText(text+"5");
}
}elseif(e.getSource()==number_key.six){
if(com||i==0){
result.text.setText("6");
com=false;
i=1;
}else{
text=result.text.getText();
result.text.setText(text+"6");
}
}elseif(e.getSource()==number_key.seven){
if(com||i==0){
result.text.setText("7");
com=false;
i=1;
}else{
text=result.text.getText();
result.text.setText(text+"7");
}
}elseif(e.getSource()==number_key.eight){
if(com||i==0){
result.text.setText("8");
com=false;
i=1;
}else{
text=result.text.getText();
result.text.setText(text+"8");
}
}elseif(e.getSource()==number_key.nine){
if(com||i==0){
result.text.setText("9");
com=false;
i=1;
}else{
text=result.text.getText();
result.text.setText(text+"9");
}
}
/*
*對於0這個按鈕有一定的說法，在我的程序里不會出現如00000這樣的情況，我加了判斷條件就是
*如果text中的數值=0就要判斷在這個數值中是否有.存在?如果有那麼就在原來數值基礎之上添加0;否則保持原來的數值不變
*/
elseif(e.getSource()==number_key.zero){//result.text.getText()是得到text里內容的意思
if(com||i==0){
result.text.setText("0");
com=false;
i=1;
}else{
text=result.text.getText();
if(Float.parseFloat(text)>0||Float.parseFloat(text)<0){//Float.parseFloat(text)就是類型轉換了，下面都是一樣
result.text.setText(text+"0");
}else{
if(text.trim().indexOf(".")==-1){
result.text.setText(text);
}else{
result.text.setText(text+"0");
}
}
}
}elseif(e.getSource()==number_key.ce){
result.text.setText("0");
i=0;
com=true;
//text="";
defbutton=0;
}
/*
*本程序不會讓一個數值中出現2個以上的小數點.具體做法是:判斷是否已經存在.存在就不添加,不存在就添加.
*/
elseif(e.getSource()==number_key.point){
if(com||i==0){
result.text.setText("0.");
com=false;
i=1;
}else{
text=result.text.getText();
if(text.trim().indexOf(".")==-1){
result.text.setText(text+".");
}else{
result.text.setText(text);
}
}
}//獲得點擊+之前的數值
elseif(e.getSource()==number_key.plus){
com=true;
i=0;
defbutton=Double.parseDouble(result.text.getText());
symbol=1;
}//獲得點擊-之前的數值
elseif(e.getSource()==number_key.sub){
com=true;
i=0;
defbutton=Double.parseDouble(result.text.getText());
symbol=2;
}//獲得點擊*之前的數值
elseif(e.getSource()==number_key.mul){
com=true;
i=0;
defbutton=Double.parseDouble(result.text.getText());
System.out.println(defbutton);
symbol=3;
}//獲得點擊/之前的數值
elseif(e.getSource()==number_key.div){
com=true;
i=0;
defbutton=Double.parseDouble(result.text.getText());
symbol=4;
}elseif(e.getSource()==number_key.equal){
switch(symbol){
case1:{//計算加法
doublead=defbutton
+Double.parseDouble(result.text.getText());
result.text.setText(ad+"");
i=0;
text="";
break;
}
case2:{//計算減法
doublead=defbutton
-Double.parseDouble(result.text.getText());
result.text.setText(String.valueOf(ad));
i=0;
text="";
break;
}
case3:{//計算乘法
doublead=defbutton
*Double.parseDouble(result.text.getText());
result.text.setText(ad+"");
i=0;
text="";
break;
}
case4:{//計算除法
doublead=defbutton
/Double.parseDouble(result.text.getText());
result.text.setText(ad+"");
i=0;
text="";
break;
}
}
System.out.println(com);
}
System.out.println(result.text.getText());
}
@SuppressWarnings("deprecation")
publicstaticvoidmain(String[]args){
Jisuanqiloveyou=newJisuanqi();
loveyou.show();
}
}
//計算器數字按鈕定義面板
classNumber_KeyextendsJPanel{
/**
*
*/
=1L;
JButtonzero=newJButton("0");//數字鍵0
JButtonone=newJButton("1");//數字鍵1
JButtontwo=newJButton("2");//數字鍵2
JButtonthree=newJButton("3");//數字鍵3
JButtonfour=newJButton("4");//數字鍵4
JButtonfive=newJButton("5");//數字鍵5
JButtonsix=newJButton("6");//數字鍵6
JButtonseven=newJButton("7");//數字鍵7
JButtoneight=newJButton("8");//數字鍵8
JButtonnine=newJButton("9");//數字鍵9
JButtonplus=newJButton("+");
JButtonsub=newJButton("-");
JButtonmul=newJButton("*");
JButtondiv=newJButton("/");
JButtonequal=newJButton("=");
JButtonce=newJButton("清零");//置零鍵
JButtonpoint=newJButton(".");
Number_Key(){
setLayout(newGridLayout(4,4,1,1));//定義布局管理器為網格布局
setBackground(Color.blue);//設置背景顏色
//添加按鈕
add(one);
add(two);
add(three);
add(four);
add(five);
add(six);
add(seven);
add(eight);
add(nine);
add(zero);
add(plus);
add(sub);
add(mul);
add(div);
add(point);
add(equal);
add(ce);
}
}
//計算器顯示結果的窗體
classResultextendsJPanel{
/**
*
*/
=1L;
//text先是輸入和結果
JTextFieldtext=newJTextField("0");
@SuppressWarnings("deprecation")
Result(){//講輸入的數字或得到的結果在text的右邊顯示
text.setHorizontalAlignment(SwingConstants.RIGHT);
text.enable(false);//文本框不能編輯
setLayout(newBorderLayout());//設定布局管理器邊框布局
add(text,BorderLayout.CENTER);//text放置在窗體的中間
}
}
直接復制保存成Jisuanqi.java可以直接運行了
2. 用java編寫一個簡單計算器
/*
* @(#)JCalculator.java 1.00 06/17/2015
*/
importjava.awt.*;
importjava.awt.event.*;
importjavax.swing.*;
/**
* A simple calculator program.
*<p>I saw this program in a QQ group, and help a friend correct it.</p>
*
*@authorSingyuenYip
*@version1.00 12/29/2009
*@seeJFrame
*@seeActionListener
*/
{
/**
* Serial Version UID
*/
= -169068472193786457L;
/**
* This class help close the Window.
*@authorSingyuenYip
*
*/
{
publicvoidwindowClosing(WindowEvent we) {
System.exit(0);
}
}
inti;
// Strings for Digit & Operator buttons.
privatefinalString[]str= {"7","8","9","/","4","5","6","*","1",
"2","3","-",".","0","=","+"};
// Build buttons.
JButton[]buttons=newJButton[str.length];
// For cancel or reset.
JButtonreset=newJButton("CE");
// Build the text field to show the result.
JTextFielddisplay=newJTextField("0");
/**
* Constructor without parameters.
*/
publicJCalculator() {
super("Calculator");
// Add a panel.
JPanel panel1 =newJPanel(newGridLayout(4, 4));
// panel1.setLayout(new GridLayout(4,4));
for(i= 0;i<str.length;i++) {
buttons[i] =newJButton(str[i]);
panel1.add(buttons[i]);
}
JPanel panel2 =newJPanel(newBorderLayout());
// panel2.setLayout(new BorderLayout());
panel2.add("Center",display);
panel2.add("East",reset);
// JPanel panel3 = new Panel();
getContentPane().setLayout(newBorderLayout());
getContentPane().add("North", panel2);
getContentPane().add("Center", panel1);
// Add action listener for each digit & operator button.
for(i= 0;i<str.length;i++)
buttons[i].addActionListener(this);
// Add listener for "reset" button.
reset.addActionListener(this);
// Add listener for "display" button.
display.addActionListener(this);
// The "close" button "X".
addWindowListener(newWindowCloser());
// Initialize the window size.
setSize(800, 800);
// Show the window.
// show(); Using show() while JDK version is below 1.5.
setVisible(true);
// Fit the certain size.
pack();
}
publicvoidactionPerformed(ActionEvent e) {
Object target = e.getSource();
String label = e.getActionCommand();
if(target ==reset)
handleReset();
elseif("0123456789.".indexOf(label) > 0)
handleNumber(label);
else
handleOperator(label);
}
// Is the first digit pressed?
booleanisFirstDigit=true;
/**
* Number handling.
*@paramkey the key of the button.
*/
publicvoidhandleNumber(String key) {
if(isFirstDigit)
display.setText(key);
elseif((key.equals(".")) && (display.getText().indexOf(".") < 0))
display.setText(display.getText() +".");
elseif(!key.equals("."))
display.setText(display.getText() + key);
isFirstDigit=false;
}
/**
* Reset the calculator.
*/
publicvoidhandleReset() {
display.setText("0");
isFirstDigit=true;
operator="=";
}
doublenumber= 0.0;
Stringoperator="=";
/**
* Handling the operation.
*@paramkey pressed operator's key.
*/
publicvoidhandleOperator(String key) {
if(operator.equals("+"))
number+= Double.valueOf(display.getText());
elseif(operator.equals("-"))
number-= Double.valueOf(display.getText());
elseif(operator.equals("*"))
number*= Double.valueOf(display.getText());
elseif(operator.equals("/"))
number/= Double.valueOf(display.getText());
elseif(operator.equals("="))
number= Double.valueOf(display.getText());
display.setText(String.valueOf(number));
operator= key;
isFirstDigit=true;
}
publicstaticvoidmain(String[] args) {
newJCalculator();
}
}
運行界面：
3. 怎麼用java做個簡單的計算器
package com.gjq.test;
import java.util.Scanner;
public class xte {
/**
* @param args
*/
public static void main(String[] args) {
System.out.println("****************計算器****************");
System.out.print("請輸入數字①：");
Scanner scanner1 = new Scanner(System.in);
double num1= scanner1.nextDouble();
System.out.print("請輸入運算符,如：+ - * /：");
Scanner scanner2 = new Scanner(System.in);
String zifu= scanner2.next();
System.out.print("請輸入數字②：");
Scanner scanner3 = new Scanner(System.in);
double num3= scanner3.nextDouble();
char charzf =zifu.toCharArray()[0];
switch (charzf) {
case '+':
System.out.println("結果為："+num1+" "+charzf+" "+num3+" = "+(num1+num3));
break;
case '-':
System.out.println("結果為："+num1+" "+charzf+" "+num3+" = "+(num1-num3));
break;
case '*':
System.out.println("結果為："+num1+" "+charzf+" "+num3+" = "+(num1*num3));
break;
case '/':
if(num3!=0){
System.out.println("結果為："+num1+" "+charzf+" "+num3+" = "+(num1/num3));
}
break;
default:
System.out.println("輸入錯誤！");
break;
}
}
}
4. 求一個用JAVA編寫的計算器程序（1）實現簡單加、減、乘、除的運算。 （
public
MyCalculator()
{
f
=
new
JFrame("計算器ByMdou");
Container
contentPane
=
f.getContentPane();
/****************菜單的創建開始**************************************/
JMenuBar
mBar
=
new
JMenuBar();
mBar.setOpaque(true);
mEdit
=
new
JMenu("編輯(E)");
mEdit.setMnemonic(KeyEvent.VK_E);
mCopy
=
new
JMenuItem("復制(C)");
mEdit.add(mCopy);
mPaste
=
new
JMenuItem("粘貼(P)");
mEdit.add(mPaste);
mView
=
new
JMenu("查看(V)");
mView.setMnemonic(KeyEvent.VK_V);
mView.add(new
JMenuItem("標准型"));
mView.add(new
JMenuItem("科學型"));
mView.addSeparator();
mView.add(new
JMenuItem("查看分組"));
mHelp
=
new
JMenu("幫助(H)");
mHelp.setMnemonic(KeyEvent.VK_H);
mHelp.add(new
JMenuItem("幫助主題"));
mHelp.addSeparator();
mHelp.add(new
JMenuItem("關於計算器"));
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);
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);
5. 怎麼用JAVA編程編寫一個計算器
打開IED：打開自己java編程的軟體，採用的是eclipse軟體。
建立java工程。
編寫類。
6. 用JAVA編寫一個簡單的計算器，要求如下
太麻煩了 說個思路, 過去字元串後 先獲取+-*%的下標.然後然後分割,獲取到一個數組或list
然後循環獲取() 按照數學運算順序拼起來,
然後把公式拆分一步一步操作就得出結果啦
7. java編寫計算器
import java.awt.*;
public class CalcTest
{
public static void main(String args[])
{
Frame f=new Frame("計算器");
Panel P=new Panel();
P.setLayout(new GridLayout(4,4,1,1));
P.setSize(200,200);
TextField t=new TextField();
t.setBackground(Color.white);
t.setEnabled(false);
Button b0=new Button("0");
Button b1=new Button("1");
Button b2=new Button("2");
Button b3=new Button("3");
Button b4=new Button("4");
Button b5=new Button("5");
Button b6=new Button("6");
Button b7=new Button("7");
Button b8=new Button("8");
Button b9=new Button("9");
Button b10=new Button("+");
Button b11=new Button("-");
Button b12=new Button("*");
Button b13=new Button("/");
Button b14=new Button(".");
Button b15=new Button("=");
P.add(b1);
P.add(b2);
P.add(b3);
P.add(b10);
P.add(b4);
P.add(b5);
P.add(b6);
P.add(b11);
P.add(b7);
P.add(b8);
P.add(b9);
P.add(b12);
P.add(b0);
P.add(b14);
P.add(b15);
P.add(b13);
f.add(t,BorderLayout.NORTH);
f.add(P,BorderLayout.CENTER);
f.setResizable(false);
f.setSize(200,220);
f.setVisible(true);
}
}
希望可以幫到你，謝謝！
8. 用Java做一個簡單的計算器
窗體
package Calc;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
*
* 計算器程序
*
*/
public class CalcFrame extends JFrame {
JButton[] buttons = new JButton[16];// 16個按鈕
StringBuffer sb = null;//
JTextField text1 = null;// 計算器結果顯示框
String no1 = null;
String sign = null;// 表示+-*/符號
String[] s = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "+", "-",
"*", "/", "=", "C" };// 面板上的字元
public CalcFrame() {
setTitle("計算器");
setResizable(false);
setBounds(200, 200, 300, 350);
setLayout(null);
sb = new StringBuffer();
text1 = new JTextField();
text1.setBounds(10, 10, 250, 30);// 設置位置
text1.setFont(new Font("Arial", Font.PLAIN, 20));// 設置字體
text1.setForeground(Color.RED);// 設置顏色
add(text1);
for (int i = 0; i < s.length; i++) {
buttons[i] = new JButton(s[i]);
buttons[i].setFont(new Font("Serif", Font.BOLD, 18));
add(buttons[i]);
}// 生成面板上的按鈕.
buttons[0].setBounds(10, 50, 50, 40);
buttons[0].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(0);
text1.setText(sb.toString());
}
});
buttons[1].setBounds(70, 50, 50, 40);
buttons[1].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(1);
text1.setText(sb.toString());
}
});
buttons[2].setBounds(130, 50, 50, 40);
buttons[2].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(2);
text1.setText(sb.toString());
}
});
buttons[3].setBounds(190, 50, 50, 40);
buttons[3].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(3);
text1.setText(sb.toString());
}
});
buttons[4].setBounds(10, 100, 50, 40);
buttons[4].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(4);
text1.setText(sb.toString());
}
});
buttons[5].setBounds(70, 100, 50, 40);
buttons[5].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(5);
text1.setText(sb.toString());
}
});
buttons[6].setBounds(130, 100, 50, 40);
buttons[6].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(6);
text1.setText(sb.toString());
}
});
buttons[7].setBounds(190, 100, 50, 40);
buttons[7].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(7);
text1.setText(sb.toString());
}
});
buttons[8].setBounds(10, 150, 50, 40);
buttons[8].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(8);
text1.setText(sb.toString());
}
});
buttons[9].setBounds(70, 150, 50, 40);
buttons[9].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.append(9);
text1.setText(sb.toString());
}
});
buttons[10].setBounds(130, 150, 50, 40);
buttons[10].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sign = "+";
no1 = text1.getText();
sb.delete(0, sb.capacity());
}
});
buttons[11].setBounds(190, 150, 50, 40);
buttons[11].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sign = "-";
no1 = text1.getText();
sb.delete(0, sb.capacity());
}
});
buttons[12].setBounds(10, 200, 50, 40);
buttons[12].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sign = "*";
no1 = text1.getText();
sb.delete(0, sb.capacity());
}
});
buttons[13].setBounds(70, 200, 50, 40);
buttons[13].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sign = "/";
no1 = text1.getText();
sb.delete(0, sb.capacity());
}
});
buttons[14].setForeground(Color.RED);
buttons[14].setBounds(130, 200, 50, 40);
buttons[14].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int sum = 0;//最終結果
if (sign.equals("+")) {
int no2 = Integer.parseInt(no1);//取得前一個數
int no3 = Integer.parseInt(text1.getText());//取得現在的數
sum = no2 + no3;//累加
text1.setText(String.valueOf(sum));
}
if (sign.equals("-")) {
int no2 = Integer.parseInt(no1);
int no3 = Integer.parseInt(text1.getText());
sum = no2 - no3;
text1.setText(String.valueOf(sum));
}
if (sign.equals("*")) {
int no2 = Integer.parseInt(no1);
int no3 = Integer.parseInt(text1.getText());
sum = no2 * no3;
text1.setText(String.valueOf(sum));
}
if (sign.equals("/")) {
int no2 = Integer.parseInt(no1);
int no3 = Integer.parseInt(text1.getText());
sum = no2 / no3;
text1.setText(String.valueOf(sum));
}
}
});
buttons[15].setBounds(190, 200, 50, 40);
buttons[15].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
sb.delete(0, sb.capacity());//清除sb的內容
text1.setText("");//結果框設置為空
}
});
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//響應關閉窗口
setVisible(true);//顯示窗口
}
}
2.主程序類
package Calc;
public class CalcTest {
public static void main(String[] args) {
CalcFrame f = new CalcFrame();
}
}
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