Java編寫一個矩形類,至少包含以下方法：

import?java.awt.Point;

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public?class?Rectangle?{

private?int?widthT?=?0;

private?int?heightT?=?0;

Point?point?=?new?Point();

public?Rectangle(int?width,?int?height,?int?centerX,?int?centerY)?{

widthT?=?width;

heightT?=?height;

point.x?=?centerX;

point.y?=?centerY;

}

public?int?width()?{

return?widthT;

}

public?int?height()?{

return?heightT;

}

public?int?centerX()?{

return?point.x;

}

public?int?centerY()?{

return?point.y;

}

}

麻煩采納呦~~~親

編寫一個JAVA程序，描寫一個矩形類，并輸出某個矩形的長，寬，面積。具體描述如下？

// 矩形

public class RectangleDemo {

public static void main(String[] args) {

RectangleDemo demo = new RectangleDemo(12, 32);

System.out.println(demo.getPerimeter());

System.out.println(demo.getArea());

demo = new RectangleDemo();

System.out.println(demo.getArea());

System.out.println(demo.getPerimeter());

demo.setHeight(50);

demo.setWidth(30);

System.out.println(demo.getArea());

System.out.println(demo.getPerimeter());

}

// 求周

public double getPerimeter() {

return (height + width) * 2;

}

// 求面積

public double getArea() {

return height * width;

}

public RectangleDemo(double height, double width) {

this.height = height;

this.width = width;

}

public RectangleDemo() {

this.height = 10;

this.width = 10;

}

private double height;// 高度

private double width;// 寬度

public double getHeight() {

return height;

}

public void setHeight(double height) {

this.height = height;

}

public double getWidth() {

return width;

}

public void setWidth(double width) {

this.width = width;

}

}

編寫矩形類RectangleJava程序矩形類兩數據員別rLength寬rWidth通getLength()、getWidth()、getArea()別查看矩形、寬面積通setLength()setWidth()重新設置矩形寬

java中做一個按鈕，點擊按鈕后畫一個矩形的代碼怎么寫？

兄弟幫你寫了一個：

import java.awt.Button;

import java.awt.Color;

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.util.Random;

public class Print {

public static void main(String[] args) {

new Te();

}

}

class Te extends Frame implements ActionListener {

Color cc = Color.red;

int x = -20, y = -50;

Random r = new Random();

public Te() {

this.setLayout(null);

Button b = new Button("畫圓");

this.add(b);

b.setBounds(30,30,50,50);

b.addActionListener(this);

this.addWindowListener(new WindowAdapter () {

@Override

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

this.setBounds(200,200,500,400);

this.setVisible(true);

}

public void actionPerformed(ActionEvent e) {

this.cc = Color.red;

this.x = r.nextInt(400);

do {

int x1 = r.nextInt(300);

this.y = x1;

} while (this.y 50);

this.repaint();

}

@Override

public void paint(Graphics g) {

Color c = g.getColor();

g.setColor(cc);

g.drawRect(x,y,50,50);

g.setColor(c);

}

}

java 編寫一個矩形類 rect 要求如下：

public?class?Rect{

private?int?length;

private?int?width;

private?int?startX;

private?int?startY

public?Rect(){}

public?Rect(int?length,int?width){

this.length?=?length;

this.width?=?width;

}

public?Rect(int?length,int?width,int?startX,int?startY){

this.length?=?length;

this.width?=?width;

this.startX?=?startX;

this.startY?=?startY;

}

//不知道你要什么成員方法,我隨便點....

public?void?louzhuhao(){

System.out.println("樓主好....");

}

public?int?getLength()?{

return?length;

}

public?void?setLength(int?length)?{????

this.length?=?length;

}

public?int?getWidth()?{

return?width;

}

public?void?setWidth(int?width)?{

this.width?=?width;

}

public?int?getStartX()?{

return?startX;

}

public?void?setStartX(int?startX)?{

this.startX?=?startX;

}

public?int?getStartY()?{

return?startY;

}

public?void?setStartY(int?startY)?{

this.startY?=?startY;

}

}

java編程：定義一個矩形類Rectangle

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

}

JAVA,寫一個名為Rectangle的類表示矩形

這個我做完了 希望您能滿意

public class Rectangle {

private double height;

private double width;

private String color;

public double getHeight() {

return height;

}

public void setHeight(double height) {

this.height = height;

}

public double getWidth() {

return width;

}

public void setWidth(double width) {

this.width = width;

}

public String getColor() {

return color;

}

public void setColor(String color) {

this.color = color;

}

public Rectangle(double width,double height,String color){

this.setColor(color);

this.setHeight(height);

this.setWidth(width);

}

public void getArea(){

double area=0;

area=this.height*this.width;

System.out.println("矩形的面積為"+area);

}

public String toString(){

String recStr="矩形的高度："+this.getHeight()+"寬度："+this.getWidth()

+"顏色:"+this.getColor();

return recStr;

}

/**

* 測試函數

* @param args

*/

public static void main(String[] args) {

Rectangle rec=new Rectangle(3, 4, "紅色");

rec.getArea();

System.out.println(rec.toString());

}

}