java eclipse 创建矩形类Rectangle,以及测试类RectangleTest
时间: 2024-01-15 13:05:55 浏览: 97
Rectangle类:
```java
public class Rectangle {
private double length;
private double width;
public Rectangle(double length, double width) {
this.length = length;
this.width = width;
}
public double getLength() {
return length;
}
public double getWidth() {
return width;
}
public double getArea() {
return length * width;
}
public double getPerimeter() {
return 2 * (length + width);
}
}
```
RectangleTest类:
```java
public class RectangleTest {
public static void main(String[] args) {
Rectangle rectangle = new Rectangle(5, 10);
System.out.println("Length: " + rectangle.getLength());
System.out.println("Width: " + rectangle.getWidth());
System.out.println("Area: " + rectangle.getArea());
System.out.println("Perimeter: " + rectangle.getPerimeter());
}
}
```
输出结果:
```
Length: 5.0
Width: 10.0
Area: 50.0
Perimeter: 30.0
```