用JAVA編寫求解幾何圖形的應(yīng)用程序？

1. 抽象形狀類

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package com;

//抽象的形狀類

public abstract class Shape{

}

2. 顯示接口

package com;

//接口

public interface IDisplay{

void display(); //顯示圖形的基本信息

double getArea(); //計(jì)算面積

double getGirth(); //計(jì)算周長(zhǎng)

}

3. 三角形類

package com.tri;

import com.*;

//三角形類

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("邊長(zhǎng)：" + a + ", " + b + ", " + c);

}

}

4. 矩形類

package com.rec;

import com.*;

//矩形類

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("寬：" + this.width + ", 高：" + this.height);

}

}

5. 圓類

package com.cir;

import com.*;

//圓類

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("圓");

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

}

}

6. 正多邊形類

package com.mul;

import com.*;

//正多邊形類

public class MulSide extends Shape implements IDisplay {

protected double side; //邊長(zhǎng)

protected int n; //邊數(shù)

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("正多邊形");

System.out.println("連長(zhǎng)：" + this.side + ", 邊數(shù)：" + this.n);

}

}

7. 主類（測(cè)試類）

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("請(qǐng)輸入三角形的基本信息");

System.out.print("邊長(zhǎng)1：");

a = scan.nextDouble();

System.out.print("邊長(zhǎng)2：");

b = scan.nextDouble();

System.out.print("邊長(zhǎng)3：");

c = scan.nextDouble();

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

s.display();

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

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

System.out.println("請(qǐng)輸入矩形的基本信息");

System.out.print("寬：");

width = scan.nextDouble();

System.out.print("高：");

height = scan.nextDouble();

s = new Rectangle(width, height);

s.display();

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

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

System.out.println("請(qǐng)輸入圓的基本信息");

System.out.print("半徑：");

radius = scan.nextDouble();

s = new Circle(radius);

s.display();

System.out.println("圓的面積：" + s.getArea());

System.out.println("圓的周長(zhǎng)：" + s.getGirth());

System.out.println("請(qǐng)輸入正多邊形的基本信息");

System.out.print("邊長(zhǎng)：");

side = scan.nextDouble();

System.out.print("邊數(shù)：");

n = scan.nextInt();

s = new MulSide(side, n);

s.display();

System.out.println("正多邊形的面積：" + s.getArea());

System.out.println("正多邊形的周長(zhǎng)：" + s.getGirth());

}

}

運(yùn)行測(cè)試：

請(qǐng)輸入三角形的基本信息

邊長(zhǎng)1：3

邊長(zhǎng)2：4

邊長(zhǎng)3：5

三角形

邊長(zhǎng)：3.0, 4.0, 5.0

三角形的面積：6.0

三角形的周長(zhǎng)：12.0

請(qǐng)輸入矩形的基本信息

寬：3

高：4

矩形

寬：3.0, 高：4.0

矩形的面積：12.0

矩的周長(zhǎng)：14.0

請(qǐng)輸入圓的基本信息

半徑：2

圓

半徑：2.0

圓的面積：12.566370614359172

圓的周長(zhǎng)：12.566370614359172

請(qǐng)輸入正多邊形的基本信息

邊長(zhǎng)：2

邊數(shù)：6

正多邊形

連長(zhǎng)：2.0, 邊數(shù)：6

正多邊形的面積：10.39230484541326

正多邊形的周長(zhǎng)：12.0

用Java編寫一個(gè)繪制圖形的小程序

import java.awt.*;

import java.awt.event.*;

import java.awt.geom.*;

import javax.swing.*;

//不規(guī)則圖形的繪制

public class IrregularShapeDemo extends JFrame {

GeneralPath gPath= new GeneralPath(); //GeneralPath對(duì)象實(shí)例

Point aPoint;

//構(gòu)造函數(shù)

public IrregularShapeDemo() {

super("不規(guī)則圖形的繪制"); //調(diào)用父類構(gòu)造函數(shù)

enableEvents(AWTEvent.MOUSE_EVENT_MASK|AWTEvent.MOUSE_MOTION_EVENT_MASK); //允許事件

setSize(300, 200); //設(shè)置窗口尺寸

setVisible(true); //設(shè)置窗口可視

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //關(guān)閉窗口時(shí)退出程序

}

public void paint(Graphics g) { //重載窗口組件的paint()方法

Graphics2D g2D = (Graphics2D)g; //獲取圖形環(huán)境

g2D.draw(gPath); //繪制路徑

}

public static void main(String[] args) {

new IrregularShapeDemo();

}

protected void processMouseEvent(MouseEvent e) { //鼠標(biāo)事件處理

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

aPoint = e.getPoint(); //得到當(dāng)前鼠標(biāo)點(diǎn)

gPath = new GeneralPath(); //重新實(shí)例化GeneralPath對(duì)象

gPath.moveTo(aPoint.x,aPoint.y); //設(shè)置路徑點(diǎn)

}

}

protected void processMouseMotionEvent(MouseEvent e) { //鼠標(biāo)運(yùn)動(dòng)事件處理

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

aPoint = e.getPoint(); //得到當(dāng)前鼠標(biāo)點(diǎn)

gPath.lineTo(aPoint.x, aPoint.y); //設(shè)置路徑

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

repaint(); //重繪組件

}

}

}

java編程 完成下圖所示的圖形用戶界面設(shè)計(jì)（窗口標(biāo)題為你的真實(shí)學(xué)號(hào)及姓名，例如：11930670

好像是作業(yè), 源代碼發(fā)給你參考, ?注意學(xué)習(xí)下代碼. ?了解下布局 和按鈕的工作原理

參考代碼

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("學(xué)號(hào):XXXXX??姓名:張三");

Button?but1?=?new?Button("獲取1~100之間的隨機(jī)數(shù)");

but1.setActionCommand("隨即");

but1.addActionListener(this);

Label?label1?=?new?Label("第一個(gè)數(shù):");

tf1?=?new?TextField(5);

Label?label2?=?new?Label("第二個(gè)數(shù):");

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()?{//?關(guān)閉窗口

@Override

public?void?windowClosing(WindowEvent?e)?{

System.exit(0);

}

});

}

@Override

public?void?actionPerformed(ActionEvent?e)?{

String?command?=?e.getActionCommand();

if?(command.equals("隨即"))?{

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程序設(shè)計(jì)圖形類

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 }

求一個(gè)簡(jiǎn)單的java代碼：（圖形界面）

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("登陸賬戶", JLabel.CENTER);

private JLabel l_pw = new JLabel("登陸密碼", 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("系統(tǒng)登錄");

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 錄");

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

btnLogin.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

addBtnLoginActionListener();

}

});

getContentPane().add(btnLogin);

btnClose = new JButton();

btnClose.setText("關(guān) 閉");

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, "帳號(hào)不可為空", "Caution",

JOptionPane.WARNING_MESSAGE);

return;

}

if (password.equals("")) {

JOptionPane.showMessageDialog(this, "密碼不可為空", "Caution",

JOptionPane.WARNING_MESSAGE);

return;

}

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

+ password + "'";

boolean success = false;

// TODO:數(shù)據(jù)校驗(yàn) success = executeQuery(sql);

if (success) {

// TODO： 如果數(shù)據(jù)校驗(yàn)成功 顯示主界面 并關(guān)閉登錄界面

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

JOptionPane.INFORMATION_MESSAGE);

this.dispose();

} else {

JOptionPane.showMessageDialog(this, "帳號(hào)或密碼錯(cuò)誤!", "警告",

JOptionPane.WARNING_MESSAGE);

t_pw.requestFocus(); // 密碼框選中

}

}

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);

// 輸入密碼后回車相當(dāng)于點(diǎn)擊了登錄按鈕

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);

}

}

希望對(duì)你有幫助

新聞標(biāo)題：java程序設(shè)計(jì)圖形代碼 java程序設(shè)計(jì)圖形代碼怎么用
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