java編程計(jì)算器的代碼,JAVA計(jì)算器代碼
求用JAVA實(shí)現(xiàn)計(jì)算器的代碼（可實(shí)用的，沒語法錯(cuò)誤的）
import java.awt.BorderLayout; import java.awt.Color; 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.JOptionPane; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.border.TitledBorder; //導(dǎo)包 public class Jisuanqi extends JFrame implements ActionListener { //繼承JFrame 實(shí)現(xiàn)事件監(jiān)聽 private JTextField reasult; private JButton btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9, btn0, btnAC, btnAdd, btnSub, btnReasult, btnD, btnAbout, btnCancel; private boolean add, sub, end, s, c; private String str; private double num1, num2; public Jisuanqi() { //構(gòu)造屬性 JPanel p1 = new JPanel(); JPanel p2 = new JPanel(); JPanel p3 = new JPanel(); TitledBorder tb = new TitledBorder("輸出"); tb.setTitleColor(Color.BLUE); //標(biāo)題邊框底端線 設(shè)置顏色 btnAbout = new JButton(" 關(guān)于 "); btnCancel = new JButton("Cancel"); //兩個(gè)按鈕 btnCancel.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ee) { System.exit(0); } }); //給Cancel添加事件監(jiān)聽 當(dāng)鼠標(biāo)點(diǎn)擊時(shí) 程序結(jié)束 btnAbout.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ee) { JOptionPane.showMessageDialog(null, "黃蓋??！", "消息", JOptionPane.INFORMATION_MESSAGE); } //給“關(guān)于”添加事件監(jiān)聽 當(dāng)鼠標(biāo)點(diǎn)擊時(shí) 彈出對話框 顯示黃蓋 }); p3.add(btnAbout); p3.add(btnCancel); // JPanel p4=new JPanel(); // JPanel p5=new JPanel(); // reasult.setBorder(tb); reasult = new JTextField("0", 20); reasult.setEditable(false); //設(shè)置不能修改 reasult.setHorizontalAlignment(JTextField.RIGHT); // 設(shè)置文本的水平對齊方式。 reasult.setForeground(Color.BLUE); //顏色 p1.setBorder(tb); p1.add(reasult); btn0 = new JButton("0"); btn0.addActionListener(this); btn1 = new JButton("1"); btn1.addActionListener(this); btn2 = new JButton("2"); btn2.addActionListener(this); btn3 = new JButton("3"); btn3.addActionListener(this); btn4 = new JButton("4"); btn4.addActionListener(this); btn5 = new JButton("5"); btn5.addActionListener(this); btn6 = new JButton("6"); btn6.addActionListener(this); btn7 = new JButton("7"); btn7.addActionListener(this); btn8 = new JButton("8"); btn8.addActionListener(this); btn9 = new JButton("9"); btn9.addActionListener(this); btnD = new JButton("."); btnD.addActionListener(this); btnD.setForeground(Color.RED); btnAC = new JButton("AC"); btnAC.addActionListener(this); btnAC.setBackground(Color.PINK); btnAdd = new JButton("+"); btnAdd.addActionListener(this); btnAdd.setForeground(Color.BLUE); btnSub = new JButton("—"); btnSub.addActionListener(this); btnSub.setForeground(Color.BLUE); btnReasult = new JButton("="); btnReasult.addActionListener(this); btnReasult.setForeground(Color.RED); //事件監(jiān)聽 + 顏色 p2.add(btn1); p2.add(btn2); p2.add(btn3); p2.add(btn4); p2.add(btn5); p2.add(btn6); p2.add(btn7); p2.add(btn8); p2.add(btn9); p2.add(btn0); p2.add(btnD); p2.add(btnAC); p2.add(btnAdd); p2.add(btnSub); p2.add(btnReasult); //面板上添加按鈕 p2.setLayout(new GridLayout(5, 3)); //面板上設(shè)置對齊方式 add(p1, BorderLayout.NORTH); add(p2, BorderLayout.CENTER); add(p3, BorderLayout.SOUTH); //將p1 p2 p3 面板對象添加到JFrame } public void num(int i) { String s = null; s = String.valueOf(i); if (end) { // 如果數(shù)字輸入結(jié)束，則將文本框置零，重新輸入 reasult.setText("0"); end = false; } if ((reasult.getText()).equals("0")) { // 如果文本框的內(nèi)容為零，則覆蓋文本框的內(nèi)容 reasult.setText(s); } else { // 如果文本框的內(nèi)容不為零，則在內(nèi)容后面添加數(shù)字 str = reasult.getText() + s; reasult.setText(str); } }/* * * String s=null; * * s=String.valueOf(i); * * str=reasult.getText()+s; * * reasult.setText(str); * * } */ public void actionPerformed(ActionEvent e) { if (e.getSource() == btn1) num(1); else if (e.getSource() == btn2) num(2); else if (e.getSource() == btn3) num(3); else if (e.getSource() == btn4) num(4); else if (e.getSource() == btn5) num(5); else if (e.getSource() == btn6) num(6); else if (e.getSource() == btn7) num(7); else if (e.getSource() == btn8) num(8); else if (e.getSource() == btn9) num(9); else if (e.getSource() == btn0) num(0); else if (e.getSource() == btnAdd) { sign(1); btnD.setEnabled(true); } else if (e.getSource() == btnSub) { sign(2); btnD.setEnabled(true); } else if (e.getSource() == btnAC) { btnD.setEnabled(true); reasult.setText("0"); } else if (e.getSource() == btnD) { str = reasult.getText(); str += "."; reasult.setText(str); btnD.setEnabled(false); } else if (e.getSource() == btnReasult) { btnD.setEnabled(true); num2 = Double.parseDouble(reasult.getText()); if (add) { num1 = num1 + num2; } else if (sub) { num1 = num1 - num2; } reasult.setText(String.valueOf(num1)); end = true; } } public void sign(int s) { if (s == 1) { add = true; sub = false; } else if (s == 2) { add = false; sub = true; } num1 = Double.parseDouble(reasult.getText()); end = true; } //設(shè)計(jì)計(jì)算的過程 public static void main(String[] args) { Jisuanqi j = new Jisuanqi(); j.setTitle("+/-簡易計(jì)算器"); j.setLocation(500, 280); j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //默認(rèn)關(guān)閉可以關(guān)閉程序 j.setResizable(false); j.pack(); j.setVisible(true); } } 這個(gè)計(jì)算機(jī)，絕對讓你滿意
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用JAVA編寫的科學(xué)計(jì)算器源代碼
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class Counter extends WindowAdapter
{
static JFrame f=new JFrame("計(jì)算器");
static JTextField text1=new JTextField("0.");
static String source="";
static String cal="";
static String object="";
static boolean flag=false;
static boolean flag1=true;
static boolean flag2=false;
public void init()
{
try
{
Container c=f.getContentPane();
JPanel pan1=new JPanel();
JButton b1=new JButton("1");
JButton b2=new JButton("2");
JButton b3=new JButton("3");
JButton b4=new JButton("4");
JButton b5=new JButton("5");
JButton b6=new JButton("6");
JButton b7=new JButton("7");
JButton b8=new JButton("8");
JButton b9=new JButton("9");
JButton b0=new JButton("0");
JButton b11=new JButton("+");
JButton b12=new JButton("-");
JButton b13=new JButton("*");
JButton b14=new JButton("/");
JButton b15=new JButton(".");
JButton b16=new JButton("=");
JButton bclar=new JButton("清零");
text1.setHorizontalAlignment(JTextField.RIGHT);
c.add(text1,"North");
c.add(pan1);
A aa=new A();
Result re=new Result();
Opertion op=new Opertion();
Clar cl=new Clar();
b1.addActionListener(aa);
b2.addActionListener(aa);
b3.addActionListener(aa);
b4.addActionListener(aa);
b5.addActionListener(aa);
b6.addActionListener(aa);
b7.addActionListener(aa);
b8.addActionListener(aa);
b9.addActionListener(aa);
b0.addActionListener(aa);
b11.addActionListener(op);
b12.addActionListener(op);
b13.addActionListener(op);
b14.addActionListener(op);
b16.addActionListener(re);
b15.addActionListener(aa);
bclar.addActionListener(cl);
pan1.add(b1);
pan1.add(b2);
pan1.add(b3);
pan1.add(b11);
pan1.add(b4);
pan1.add(b5);
pan1.add(b6);
pan1.add(b12);
pan1.add(b7);
pan1.add(b8);
pan1.add(b9);
pan1.add(b13);
pan1.add(b0);
pan1.add(b15);
pan1.add(b16);
pan1.add(b14);
pan1.add(bclar);
f.setSize(200,220);
f.setVisible(true);
}
catch(Exception e)
{
System.out.println(e.getMessage());
}
}
class A implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String a=text1.getText();
String s=e.getActionCommand();
if(a.equals("0.")||a.equals("+")||a.equals("-")||a.equals("*")||a.equals("/"))
text1.setText(s);
else {
if(flag2)
{
text1.setText(s);
flag2=false;
}
else
text1.setText(a+s);
}
}
}
class Opertion implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
cal=e.getActionCommand();
if(flag1==true)
source=text1.getText();
text1.setText(cal);
flag1=false;
flag=true;
}
}
class Result implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
double num1;
num1=Double.parseDouble(source);
object=text1.getText();
double num2;
num2=Double.parseDouble(object);
double result=0;
if(cal.equals("+"))
result=num1+num2;
if(cal.equals("-"))
result=num1-num2;
if(cal.equals("*"))
result=num1*num2;
if(cal.equals("/"))
if(num2==0)
text1.setText("除數(shù)不能為0");
else
result=num1/num2;
String s1=Double.toString(result);
text1.setText(s1);
flag1=true;
flag2=true;
}
}
class Clar implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
text1.setText("0.");
}
}
public static void main(String[] args)
{
Counter count=new Counter();
count.init();
}
public void windowClosing(WindowEvent e){
System.exit(1);
}
public void windowOpened(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowActivated(WindowEvent e){}
public void windowDeactivated(WindowEvent e){}
}
用java語言編寫一個(gè)計(jì)算器的程序?
import java.util.*;
public class Test {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("*****************簡易計(jì)算器****************");
System.out.println("*\t\t\t\t\t*");
System.out.println("* 使用說明： 1.加法 2.減法 3.乘法 4.除法 *");
System.out.println("*\t\t\t\t\t*");
System.out.println("*****************************************");
for(int i=0;i100;i++){
System.out.print("\n請選擇運(yùn)算規(guī)則：");
int num = input.nextInt();
switch(num){
case 1:
System.out.println("\n******你選擇了加法******\n");
System.out.print("請輸入第1個(gè)加數(shù):");
int jiashu1 = input.nextInt();
System.out.print("請輸入第2個(gè)加數(shù):");
int jiashu2 = input.nextInt();
System.out.println("運(yùn)算結(jié)果為:" + jiashu1 + " + " + jiashu1 + " = " + (jiashu1 + jiashu2));
break;
case 2:
System.out.println("\n******你選擇了減法******\n");
System.out.print("請輸入被減數(shù):");
int jianshu1 = input.nextInt();
System.out.print("請輸入減數(shù):");
int jianshu2 = input.nextInt();
System.out.println("運(yùn)算結(jié)果為:" + jianshu1 + " - " + jianshu2 + " = " + (jianshu1 - jianshu2));
break;
case 3:
System.out.println("\n******你選擇了乘法******\n");
System.out.print("請輸入第1個(gè)因數(shù):");
int chengfa1 = input.nextInt();
System.out.print("請輸入第2個(gè)因數(shù):");
int chengfa2 = input.nextInt();
System.out.println("運(yùn)算結(jié)果為:" + chengfa1 + " * " + chengfa2 + " = " + (chengfa1 * chengfa2));
break;
case 4:
System.out.println("\n******你選擇了除法******\n");
System.out.print("請輸入被除數(shù):");
double chufa1 = input.nextInt();
System.out.print("請輸入除數(shù):");
double chufa2 = input.nextInt();
System.out.println("運(yùn)算結(jié)果為:" + chufa1 + " / " + chufa2 + " = " + (chufa1 / chufa2) + " 余 " + (chufa1 % chufa2));
break;
default:
System.out.println("\n你的選擇有錯(cuò)，請重新選擇!");
break;
}
}
}
}
java編程，用代碼實(shí)現(xiàn)計(jì)算器類（Calculator）
public class Calculator {
private int number1;
private int number2;
public Calculator(int number1, int number2) {
this.number1 = number1;
this.number2 = number2;
}
public double add() {
return number1 + number2;
}
public double subtract() {
return number1 - number2;
}
public double multiple() {
return number1 * number2;
}
public double divide() {
if(number2 == 0) {
return 0;
}
return number1 / number2;
}
}
public class TestCalculator {
public static void main(String[] args) {
Calculator calculator = new Calculator(5, 2);
System.out.println(calculator.add());
System.out.println(calculator.subtract());
System.out.println(calculator.multiple());
System.out.println(calculator.divide());
}
}
名稱欄目：java編程計(jì)算器的代碼,JAVA計(jì)算器代碼
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