java程序设计图形代码 java程序设计图形代码怎么用

用JAVA编写求解几何图形的应用程序？

1. 抽象形状类

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package com;

//抽象的形状类

public abstract class Shape{

}

2. 显示接口

package com;

//接口

public interface IDisplay{

void display(); //显示图形的基本信息

double getArea(); //计算面积

double getGirth(); //计算周长

}

3. 三角形类

package com.tri;

import com.*;

//三角形类

public class Triangle extends Shape implements IDisplay{

protected double a;

protected double b;

protected double c;

public Triangle(double a, double b, double c){

this.a = a;

this.b = b;

this.c = c;

}

@Override

public double getArea() {

double s = (a + b + c) / 2;

return Math.sqrt(s*(s-a)*(s-b)*(s-c));

}

@Override

public double getGirth() {

return this.a + this.b + this.c;

}

@Override

public void display() {

System.out.println("三角形");

System.out.println("边长：" + a + ", " + b + ", " + c);

}

}

4. 矩形类

package com.rec;

import com.*;

//矩形类

public class Rectangle extends Shape implements IDisplay {

protected double width;

protected double height;

public Rectangle(double width, double height){

this.width = width;

this.height = height;

}

@Override

public double getArea() {

return this.width * this.height;

}

@Override

public double getGirth() {

return 2 * ( this.width + this.height);

}

@Override

public void display() {

System.out.println("矩形");

System.out.println("宽：" + this.width + ", 高：" + this.height);

}

}

5. 圆类

package com.cir;

import com.*;

//圆类

public class Circle extends Shape implements IDisplay {

protected double radius;

public Circle(double radius){

this.radius = radius;

}

@Override

public double getArea() {

return Math.PI * this.radius * this.radius;

}

@Override

public double getGirth() {

return 2 * Math.PI * this.radius;

}

@Override

public void display() {

System.out.println("圆");

System.out.println("半径：" + this.radius);

}

}

6. 正多边形类

package com.mul;

import com.*;

//正多边形类

public class MulSide extends Shape implements IDisplay {

protected double side; //边长

protected int n; //边数

public MulSide(double side, int n){

this.side = side;

this.n = n;

}

@Override

public double getArea() {

return n * side * side * Math.tan((n-2) * Math.PI / (2 * n)) / 4;

}

@Override

public double getGirth() {

return this.side * this.n;

}

@Override

public void display() {

System.out.println("正多边形");

System.out.println("连长：" + this.side + ", 边数：" + this.n);

}

}

7. 主类（测试类）

package com;

import java.util.Scanner;

import com.cir.Circle;

import com.mul.MulSide;

import com.rec.Rectangle;

import com.tri.Triangle;

public class Test22 {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

double a, b, c;

double width, height;

double radius;

double side;

int n;

IDisplay s;

System.out.println("请输入三角形的基本信息");

System.out.print("边长1：");

a = scan.nextDouble();

System.out.print("边长2：");

b = scan.nextDouble();

System.out.print("边长3：");

c = scan.nextDouble();

s = new Triangle(a, b, c);

s.display();

System.out.println("三角形的面积：" + s.getArea());

System.out.println("三角形的周长：" + s.getGirth());

System.out.println("请输入矩形的基本信息");

System.out.print("宽：");

width = scan.nextDouble();

System.out.print("高：");

height = scan.nextDouble();

s = new Rectangle(width, height);

s.display();

System.out.println("矩形的面积：" + s.getArea());

System.out.println("矩的周长：" + s.getGirth());

System.out.println("请输入圆的基本信息");

System.out.print("半径：");

radius = scan.nextDouble();

s = new Circle(radius);

s.display();

System.out.println("圆的面积：" + s.getArea());

System.out.println("圆的周长：" + s.getGirth());

System.out.println("请输入正多边形的基本信息");

System.out.print("边长：");

side = scan.nextDouble();

System.out.print("边数：");

n = scan.nextInt();

s = new MulSide(side, n);

s.display();

System.out.println("正多边形的面积：" + s.getArea());

System.out.println("正多边形的周长：" + s.getGirth());

}

}

运行测试：

请输入三角形的基本信息

边长1：3

边长2：4

边长3：5

三角形

边长：3.0, 4.0, 5.0

三角形的面积：6.0

三角形的周长：12.0

请输入矩形的基本信息

宽：3

高：4

矩形

宽：3.0, 高：4.0

矩形的面积：12.0

矩的周长：14.0

请输入圆的基本信息

半径：2

圆

半径：2.0

圆的面积：12.566370614359172

圆的周长：12.566370614359172

请输入正多边形的基本信息

边长：2

边数：6

正多边形

连长：2.0, 边数：6

正多边形的面积：10.39230484541326

正多边形的周长：12.0

用Java编写一个绘制图形的小程序

import java.awt.*;

import java.awt.event.*;

import java.awt.geom.*;

import javax.swing.*;

//不规则图形的绘制

public class IrregularShapeDemo extends JFrame {

GeneralPath gPath= new GeneralPath(); //GeneralPath对象实例

Point aPoint;

//构造函数

public IrregularShapeDemo() {

super("不规则图形的绘制"); //调用父类构造函数

enableEvents(AWTEvent.MOUSE_EVENT_MASK|AWTEvent.MOUSE_MOTION_EVENT_MASK); //允许事件

setSize(300, 200); //设置窗口尺寸

setVisible(true); //设置窗口可视

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //关闭窗口时退出程序

}

public void paint(Graphics g) { //重载窗口组件的paint()方法

Graphics2D g2D = (Graphics2D)g; //获取图形环境

g2D.draw(gPath); //绘制路径

}

public static void main(String[] args) {

new IrregularShapeDemo();

}

protected void processMouseEvent(MouseEvent e) { //鼠标事件处理

if(e.getID() == MouseEvent.MOUSE_PRESSED) {

aPoint = e.getPoint(); //得到当前鼠标点

gPath = new GeneralPath(); //重新实例化GeneralPath对象

gPath.moveTo(aPoint.x,aPoint.y); //设置路径点

}

}

protected void processMouseMotionEvent(MouseEvent e) { //鼠标运动事件处理

if(e.getID() == MouseEvent.MOUSE_DRAGGED) {

aPoint = e.getPoint(); //得到当前鼠标点

gPath.lineTo(aPoint.x, aPoint.y); //设置路径

gPath.moveTo(aPoint.x, aPoint.y);

repaint(); //重绘组件

}

}

}

java编程 完成下图所示的图形用户界面设计（窗口标题为你的真实学号及姓名，例如：11930670

好像是作业, 源代码发给你参考,  注意学习下代码.  了解下布局 和按钮的工作原理

参考代码

import java.awt.*;

import java.awt.event.*;

public class MyRandomFrame extends Frame implements ActionListener {

private final TextField tf1;

private final TextField tf2;

private final TextField tf3;

public static void main(String[] args) {

new MyRandomFrame().setVisible(true);

}

public MyRandomFrame() {

setSize(600, 100);

setLocationRelativeTo(null);

setTitle("学号:XXXXX  姓名:张三");

Button but1 = new Button("获取1~100之间的随机数");

but1.setActionCommand("随即");

but1.addActionListener(this);

Label label1 = new Label("第一个数:");

tf1 = new TextField(5);

Label label2 = new Label("第二个数:");

tf2 = new TextField(5);

Button but2 = new Button("求和");

but2.setActionCommand("求和");

but2.addActionListener(this);

tf3 = new TextField(5);

setLayout(new FlowLayout());

add(but1);

add(label1);

add(tf1);

add(label2);

add(tf2);

add(but2);

add(tf3);

addWindowListener(new WindowAdapter() {// 关闭窗口

@Override

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

}

@Override

public void actionPerformed(ActionEvent e) {

String command = e.getActionCommand();

if (command.equals("随即")) {

int a = (int) (Math.random() * 100);

int b = (int) (Math.random() * 100);

tf1.setText(String.valueOf(a));

tf2.setText(String.valueOf(b));

} else if (command.equals("求和")) {

int x = Integer.parseInt(tf1.getText());

int y = Integer.parseInt(tf2.getText());

tf3.setText(String.valueOf((x + y)));

}

}

}

Java程序设计图形类

public class Rectangle{ private int width; private int height; public Rectangle(){ this.width = 10; this.height = 10; } public Rectangle(int width, int height){ this.width = width; this.height = height; } public int area(){ return width * height; } //省略getter/setter }

求一个简单的java代码：（图形界面）

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JDialog;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

public class vv extends JDialog {

private static final long serialVersionUID = 1L;

private JLabel l_Id = new JLabel("登陆账户", JLabel.CENTER);

private JLabel l_pw = new JLabel("登陆密码", JLabel.CENTER);

private JTextField t_Id = new JTextField(10);

private JPasswordField t_pw = new JPasswordField(10);

private JButton btnLogin;

private JButton btnClose;

public vv() {

super();

setResizable(false);

getContentPane().setBackground(new Color(225, 225, 225));

getContentPane().setLayout(null);

initialize();

}

protected void initialize() {

setTitle("系统登录");

l_Id.setBounds(48, 43, 53, 25);

t_Id.setBounds(110, 43, 150, 25);

l_pw.setBounds(48, 93, 53, 25);

t_pw.setBounds(110, 93, 150, 25);

getContentPane().add(l_Id);

getContentPane().add(l_pw);

getContentPane().add(t_Id);

getContentPane().add(t_pw);

btnLogin = new JButton();

btnLogin.setText("登 录");

btnLogin.setBounds(70, 142, 85, 28);

btnLogin.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

addBtnLoginActionListener();

}

});

getContentPane().add(btnLogin);

btnClose = new JButton();

btnClose.setText("关 闭");

btnClose.setBounds(175, 142, 85, 28);

btnClose.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

dispose();

System.exit(-1);

}

});

getContentPane().add(btnClose);

}

private void addBtnLoginActionListener() {

String user = t_Id.getText();

String password = new String(t_pw.getPassword());

if (user.equals("")) {

JOptionPane.showMessageDialog(this, "帐号不可为空", "Caution",

JOptionPane.WARNING_MESSAGE);

return;

}

if (password.equals("")) {

JOptionPane.showMessageDialog(this, "密码不可为空", "Caution",

JOptionPane.WARNING_MESSAGE);

return;

}

String sql = "select * FROM login WHERE id = '" + user + "' and pw = '"

+ password + "'";

boolean success = false;

// TODO:数据校验 success = executeQuery(sql);

if (success) {

// TODO： 如果数据校验成功 显示主界面 并关闭登录界面

JOptionPane.showMessageDialog(this, "成功登录", "提示",

JOptionPane.INFORMATION_MESSAGE);

this.dispose();

} else {

JOptionPane.showMessageDialog(this, "帐号或密码错误!", "警告",

JOptionPane.WARNING_MESSAGE);

t_pw.requestFocus(); // 密码框选中

}

}

public Dimension getPreferredSize() {

return new Dimension(320, 170);

}

public void show() {

Toolkit tk = Toolkit.getDefaultToolkit();

Dimension screen = tk.getScreenSize();

Dimension d = getSize();

this.setLocation((screen.width - d.width) / 2,

(screen.height - d.height) / 2);

// 输入密码后回车相当于点击了登录按钮

getRootPane().setDefaultButton(btnLogin);

t_pw.requestFocus();

setDefaultCloseOperation(DISPOSE_ON_CLOSE);

setSize(300, 220);

super.show();

}

public static void main(String[] args) {

vv loginFrame = new vv();

loginFrame.setVisible(true);

}

}

希望对你有帮助