Java/com/study/demo2/Rectangle.java

package com.study.demo2;

public class Rectangle {
  private double width = 1.0;
  private double height = 1.0;

  public Rectangle() {
  }

  public Rectangle(double width, double height) {
    this.width = width;
    this.height = height;
  }

  public double getArea() {
    return width * height;
  }

  public double getPerimeter() {
    return 2 * (width + 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;
  }
}