用java语言
发布网友
发布时间：2022-04-23 14:49
共3个回答
热心网友
时间：2023-10-19 10:11
代码追求的是简单整洁 上面两个答案写了太多无用代码
public class A {
private double a;
private double b;
//定义方法
public double juxing() {
double c=a*b;
return c;
}
//构造函数
public ddd(double a, double b) {
super();
this.a = a;
this.b = b;
}
测试类
public class B {
public static void main(String[] args) {
A a=new A(1.0, 2.0);//后面两个值是自己传的参数，随便填的
System.out.println(a.juxing());
}
}
热心网友
时间：2023-10-19 10:11
/**
* 矩形类
* @author Administrator
*
*/
public class Rectangle {
// 矩形长
private double lenght;
// 矩形款
private double width;
// 矩形面积
private double area;
// 含参数构造方法
public Rectangle(double lenght, double width) {
this.lenght = lenght;
this.width = width;
}
// 计算矩形面积
public void calculateArea() {
area = lenght * width;
System.out.println("矩形面积是：" + area);
}
public double getLenght() {
return lenght;
}
public void setLenght(double lenght) {
this.lenght = lenght;
}
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getArea() {
return area;
}
public void setArea(double area) {
this.area = area;
}
}
/**
* 测试类(主类)
* @author Administrator
*
*/
public class Test {
public static void main(String[] args) {
// 创建矩形类对象
Rectangle rt = new Rectangle(6,4);
// 调用计算矩形面积的方法
rt.calculateArea();
}
}
效果：
热心网友
时间：2023-10-19 10:12
public class Rectangle {
private double width;
private double height;
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public double getArea(){
return width * height;
}
}
public class RectTest {
public static void main(String[] args) {
Rectangle rect = new Rectangle();
rect.setWidth(20);
rect.setHeight(10.5);
double area = rect.getArea();
System.out.println(area);
}
}
热心网友
时间：2023-10-19 10:11
代码追求的是简单整洁 上面两个答案写了太多无用代码
public class A {
private double a;
private double b;
//定义方法
public double juxing() {
double c=a*b;
return c;
}
//构造函数
public ddd(double a, double b) {
super();
this.a = a;
this.b = b;
}
测试类
public class B {
public static void main(String[] args) {
A a=new A(1.0, 2.0);//后面两个值是自己传的参数，随便填的
System.out.println(a.juxing());
}
}
热心网友
时间：2023-10-19 10:11
/**
* 矩形类
* @author Administrator
*
*/
public class Rectangle {
// 矩形长
private double lenght;
// 矩形款
private double width;
// 矩形面积
private double area;
// 含参数构造方法
public Rectangle(double lenght, double width) {
this.lenght = lenght;
this.width = width;
}
// 计算矩形面积
public void calculateArea() {
area = lenght * width;
System.out.println("矩形面积是：" + area);
}
public double getLenght() {
return lenght;
}
public void setLenght(double lenght) {
this.lenght = lenght;
}
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getArea() {
return area;
}
public void setArea(double area) {
this.area = area;
}
}
/**
* 测试类(主类)
* @author Administrator
*
*/
public class Test {
public static void main(String[] args) {
// 创建矩形类对象
Rectangle rt = new Rectangle(6,4);
// 调用计算矩形面积的方法
rt.calculateArea();
}
}
效果：
热心网友
时间：2023-10-19 10:12
public class Rectangle {
private double width;
private double height;
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public double getArea(){
return width * height;
}
}
public class RectTest {
public static void main(String[] args) {
Rectangle rect = new Rectangle();
rect.setWidth(20);
rect.setHeight(10.5);
double area = rect.getArea();
System.out.println(area);
}
}
热心网友
时间：2023-10-19 10:11
代码追求的是简单整洁 上面两个答案写了太多无用代码
public class A {
private double a;
private double b;
//定义方法
public double juxing() {
double c=a*b;
return c;
}
//构造函数
public ddd(double a, double b) {
super();
this.a = a;
this.b = b;
}
测试类
public class B {
public static void main(String[] args) {
A a=new A(1.0, 2.0);//后面两个值是自己传的参数，随便填的
System.out.println(a.juxing());
}
}
热心网友
时间：2023-10-19 10:11
/**
* 矩形类
* @author Administrator
*
*/
public class Rectangle {
// 矩形长
private double lenght;
// 矩形款
private double width;
// 矩形面积
private double area;
// 含参数构造方法
public Rectangle(double lenght, double width) {
this.lenght = lenght;
this.width = width;
}
// 计算矩形面积
public void calculateArea() {
area = lenght * width;
System.out.println("矩形面积是：" + area);
}
public double getLenght() {
return lenght;
}
public void setLenght(double lenght) {
this.lenght = lenght;
}
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getArea() {
return area;
}
public void setArea(double area) {
this.area = area;
}
}
/**
* 测试类(主类)
* @author Administrator
*
*/
public class Test {
public static void main(String[] args) {
// 创建矩形类对象
Rectangle rt = new Rectangle(6,4);
// 调用计算矩形面积的方法
rt.calculateArea();
}
}
效果：
热心网友
时间：2023-10-19 10:12
public class Rectangle {
private double width;
private double height;
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public double getArea(){
return width * height;
}
}
public class RectTest {
public static void main(String[] args) {
Rectangle rect = new Rectangle();
rect.setWidth(20);
rect.setHeight(10.5);
double area = rect.getArea();
System.out.println(area);
}
}
