java计算器源代码资源 java计算器简单代码

用JAVA编写的科学计算器源代码

import java.awt.*;

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import javax.swing.*;

import java.awt.event.*;

class Counter extends WindowAdapter

{

static JFrame f=new JFrame("计算器");

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("除数不能为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){}

}

急！急！求java计算器源代码最后能出如图这样的界面并能运行急啊好的翻倍追加分啊

import java.awt.BorderLayout;

import java.awt.Button;

import java.awt.FlowLayout;

import java.awt.Frame;

import java.awt.GridLayout;

import java.awt.Panel;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

public class CalculatorGUI {

private Frame f;

private Panel p1, p2;

private Button b0, b1, b2, b3, b4, b5, b6, b7, b8, b9;

private Button bPoint, bAdd, bDec, bMul, bDiv, bCal;

private TextField tf;

private String s, op;

private Calculator cal = new Calculator();

private boolean ifOp;

public CalculatorGUI() {

f = new Frame("Calculator");

p1 = new Panel();

p2 = new Panel();

b0 = new Button("0");

b1 = new Button("1");

b2 = new Button("2");

b3 = new Button("3");

b4 = new Button("4");

b5 = new Button("5");

b6 = new Button("6");

b7 = new Button("7");

b8 = new Button("8");

b9 = new Button("9");

bPoint = new Button(".");

bAdd = new Button("+");

bDec = new Button("-");

bMul = new Button("*");

bDiv = new Button("/");

bCal = new Button("=");

tf = new TextField(25);

tf.setEditable(false);

}

public void launchFrame() {

f.setSize(220, 160);

f.setResizable(false);

f.addWindowListener(new myWindowListener());

p1.setLayout(new FlowLayout(FlowLayout.CENTER));

p1.add(tf);

f.add(p1, BorderLayout.NORTH);

p2.setLayout(new GridLayout(4, 4));

b0.addActionListener(new setLabelText_ActionListener());

b1.addActionListener(new setLabelText_ActionListener());

b2.addActionListener(new setLabelText_ActionListener());

b3.addActionListener(new setLabelText_ActionListener());

b4.addActionListener(new setLabelText_ActionListener());

b5.addActionListener(new setLabelText_ActionListener());

b6.addActionListener(new setLabelText_ActionListener());

b7.addActionListener(new setLabelText_ActionListener());

b8.addActionListener(new setLabelText_ActionListener());

b9.addActionListener(new setLabelText_ActionListener());

bPoint.addActionListener(new setLabelText_ActionListener());

bAdd.addActionListener(new setOperator_ActionListener());

bDec.addActionListener(new setOperator_ActionListener());

bMul.addActionListener(new setOperator_ActionListener());

bDiv.addActionListener(new setOperator_ActionListener());

bCal.addActionListener(new setOperator_ActionListener());

p2.add(b7);

p2.add(b8);

p2.add(b9);

p2.add(bAdd);

p2.add(b4);

p2.add(b5);

p2.add(b6);

p2.add(bDec);

p2.add(b1);

p2.add(b2);

p2.add(b3);

p2.add(bMul);

p2.add(b0);

p2.add(bPoint);

p2.add(bCal);

p2.add(bDiv);

f.add(p2, BorderLayout.SOUTH);

f.setVisible(true);

}

public void setTextFieldText_Temp() {

if (tf.getText().length() 15

(tf.getText().indexOf(".") == -1 || !s.equals("."))) {

tf.setText(tf.getText() + s);

} else {

tf.setText((tf.getText() + s).substring(0, 15));

}

public void setTextFieldText() {

if (ifOp) {

ifOp = false;

tf.setText("");

setTextFieldText_Temp();

} else {

setTextFieldText_Temp();

}

public static void main(String[] args) {

CalculatorGUI calculator = new CalculatorGUI();

calculator.launchFrame();

}

class myWindowListener extends WindowAdapter {

public void windowClosing(WindowEvent e) {

System.exit(0);

}

class setLabelText_ActionListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

Button tempB = (Button) e.getSource();

s = tempB.getLabel();

setTextFieldText();

}

class setOperator_ActionListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

Button tempB = (Button) e.getSource();

op = tempB.getLabel();

if (op.equals("+")) {

tf.setText(cal.opAdd(tf.getText()));

ifOp = true;

} else if (op.equals("-")) {

tf.setText(cal.opSubtract(tf.getText()));

ifOp = true;

} else if (op.equals("*")) {

tf.setText(cal.opMultiply(tf.getText()));

ifOp = true;

} else if (op.equals("/")) {

tf.setText(cal.opDivide(tf.getText()));

ifOp = true;

} else if (op.equals("=")) {

tf.setText(cal.opEquals(tf.getText()));

ifOp = true;

}

class Calculator {

private String result = "0";

private int op = 0, add = 1, sub = 2, mul = 3, div = 4;

private double stringToDouble(String x) {

double y = Double.parseDouble(x);

return y;

}

private void operate(String x) {

double x1 = stringToDouble(x);

double y = stringToDouble(result);

switch (op) {

case 0:

result = x;

break;

case 1:

result = String.valueOf(y + x1);

break;

case 2:

result = String.valueOf(y - x1);

break;

case 3:

result = String.valueOf(y * x1);

break;

case 4:

if (x1 != 0) {

result = String.valueOf(y / x1);

} else {

result = "The divisor can't be zero!";

}

break;

}

public String opAdd(String x) {

operate(x);

op = add;

return result;

}

public String opSubtract(String x) {

operate(x);

op = sub;

return result;

}

public String opMultiply(String x) {

operate(x);

op = mul;

return result;

}

public String opDivide(String x) {

operate(x);

op = div;

return result;

}

public String opEquals(String x) {

operate(x);

op = 0;

return result;

}

public void opClean() {

op = 0;

result = "0";

}