Java 长方形类定义及面积计算示例 - 代码详解

// \u005c"长方形类\u005c" class Rectangle { double height; double width;

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

}

// \u005c"测试类\u005c" public class TestRectangle { public static void main(String[] args) { // \u005c"创建两个长方形对象\u005c" Rectangle rectangle1 = new Rectangle(); Rectangle rectangle2 = new Rectangle();

    // \u005c"给成员变量赋值\u005c"
    rectangle1.height = 5.0;
    rectangle1.width = 3.0;
    rectangle2.height = 7.0;
    rectangle2.width = 4.0;

    // \u005c"调用求面积方法\u005c"
    double area1 = rectangle1.getArea();
    double area2 = rectangle2.getArea();

    // \u005c"输出结果\u005c"
    System.out.println(\u005c"长方形1的面积为：\u005c" + area1);
    System.out.println(\u005c"长方形2的面积为：\u005c" + area2);
}

}