java源代码曲线计算_java源代码怎么导出

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 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();

b0 = new Button("0");

b1 = new Button("1");

bPoint = new Button(".");

bAdd = new Button("+");

bDec = new Button("-");

bMul = new Button("*");

bDiv = new Button("/");

bCal = new Button("=");

tf.setEditable(false);

}

public void launchFrame() {

f.setResizable(false);

f.addWindowListener(new myWindowListener());

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

p1.add(tf);

f.add(p1, BorderLayout.NORTH);

b0.addActionListener(new setLabelText_ActionListener());

b1.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());

f.setVisible(true);

public void setTextFieldText_Temp() {

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

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

} else {

public void setTextFieldText() {

if (ifOp) {

ifOp = false;

tf.setText("");

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 {

op = tempB.getLabel();

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

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

ifOp = true;

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

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

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

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

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

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

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

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

class Calculator {

private String result = "0";

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);

result = String.valueOf(y - x1);

result = String.valueOf(y * x1);

if (x1 != 0) {

result = String.valueOf(y / x1);

public String opAdd(String x) {

operate(x);

op = add;

return result;

public String opSubtract(String x) {

op = sub;

public String opMultiply(String x) {

op = mul;

public String opDivide(String x) {

public String opEquals(String x) {

op = 0;

public void opClean() {

result = "0";

Java计算器源代码

import java.awt.*;

import javax.swing.*;public class CaculatorA {

private JFrame jf;

private JButton[] jbs;

private JTextField jtf;

private JButton clear;

private char c;

/**

* 构造方法实例化属性

*

*/

public CaculatorA(){

jf=new JFrame("我的计算器v1.0");

clear=new JButton("clear");

for(int i=0; istr.length(); i++){

jbs[i]=new JButton(str.charAt(i)+"");

init();

addEventHandler();

// setFont();

// setColor();

showMe();

用java语言如何编写计算圆周长和圆面积程序

可以通过创建一个圆的类完成计算圆周长和面积的功能.

假设这个圆的类名叫做Circle,因为根据圆的半径就可以求出圆的周长和面积,所以可以在这个类中定义一个半径属性mRadius,然后定义两个方法getLength和getArea分别实现计算圆周长和面积的功能.

java语言源代码如下：

public class Circle{

//圆的半径

private double mRadius;

public Circle(double mRadius){

this.mRadius = mRadius;

//获取圆的周长

public double getLength(){

//获取圆的面积

public double getArea(){

return Math.PI*mRadius*mRadius;

//注：由于测试类只是调用Circle类的方法,功能很简单,便没有写测试类.

求一个 JAVA 的 科学计算器 的 源代码最好里面有 sin cos 倒数、平方根、平方、立方高级一点的!

import javax.swing.*;

import java.awt.event.*;

public class Calculator implements ActionListener

{

String s="",s1;

JFrame jf = new JFrame("小计算器by Graduate") ;

JTextField tf = new JTextField();

public void init()//实现计算器界面

Container c=jf.getContentPane();

tf.setHorizontalAlignment(JTextField.RIGHT);//文本框

c.add(tf,"North");

JPanel pn1 = new JPanel();//运算界面

//设置按钮

JButton b = new JButton("CLEAR");

b.setToolTipText("请按清除键!");//设置清零键

b.setForeground(Color.RED);//设置字体颜色

b.setBackground(Color.YELLOW);//设置背景色

b.addActionListener(this);

b = new JButton("OFF");

b.setForeground(Color.RED);//字体颜色

b.setBackground(Color.ORANGE);//背景色

b = new JButton("1");//add butten 1

pn1.add(b);

b = new JButton("+");//add butten +

b.setForeground(Color.BLUE);//设置字体颜色

b = new JButton("-");//add button -

b = new JButton("*");//add button *

b = new JButton("0");//add button 0

b = new JButton(".");//add button .

b = new JButton("=");//add button =

b = new JButton("\\");//add button \

jf.setVisible(true);//设置为可视

//处理按钮按下时的动作,进行相应的处理

public void actionPerformed(ActionEvent e)

String command = e.getActionCommand();

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

if(command.equals("CLEAR")) //清零键 按下时返回初始状态

s1=null;

s="";

tf.setText("");//记录输入值的变量清空

else if(command.equals("OFF")) System.exit(0);//off键 关闭应用程序

else if(!command.equals("*")!command.equals("\\")

!command.equals("+")!command.equals("-")

!command.equals("="))//判断输入是否为数字

if(s1==null)//判断输入是否为第一个

s1 = command;

else s1+=command;

d1 = new Double(s1).doubleValue();//字符串型转换为双精度型,还原输入数字

try

catch(Exception ex)

tf.setText("Error");//错误显示"Error"

System.out.println(ex.getMessage());

else if(!command.equals("=")) //判断输入是否为+ - * \

s = command;

s1 = null;

else//输入=时,显示运算结果

tf.setText(tf.getText()+d1);

public static void main(String [] args)

new Calculator().init();

已知曲线的公式,如何用JAVA编程将曲线显示出来,要JAVA源代码

代码如下,只是时间仓促有些简陋,没有坐标轴,而且大小比例问题也没有调好.不过功能实现了.嘎嘎,新手上路,腾云驾雾.

import java.awt.Graphics;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class Bbso extends JPanel{

int x,y,x1,y1,m=100;

double d;

public Bbso() {

JFrame f = new JFrame();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.setTitle("画曲线");

f.getContentPane().add(this);

public static void main(String arg[]) {

new Bbso();

public void paint(Graphics g) {

super.paintComponent(g);

x1=0;

y1=0;

y=(int)d;

g.drawLine(x1,y1+m,x,y+m);

x1=x;

y1=y;

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