共回答了18个问题采纳率：94.4%
public class Rectangle {
private double width = 1;
private double length = 1;
public Rectangle() {
}
Rectangle(double width, double length) {
this.length = length;
this.width = width;
}
public double getWidth() {
return width;
}
public double getLength() {
return length;
}
public void setWidth(double w) {
width = w;
}
public void setLength(double l) {
length = l;
}
public double area() {
return width * length;
}
}
///
public class Volume extends Rectangle {
private double height = 1;
public Volume() {
}
public Volume(double width, double length, double height) {
super(width, length);
this.height = height;
}
public void setHeight(double h) {
height = h;
}
public double getHeight() {
return height;
}
public double volume() {
return getWidth() * getLength() * height;
}
public double area() {
return getWidth() * getLength() + getWidth() * height + getLength()* height;
}
}
//
public class sunzhiyang{
public static void main(String[] args) {
Volume v = new Volume(3.0, 4.0, 5.0);
System.out.println( v.area());
System.out.println( v.volume());
}
}
1年前
6