Java 实例 使用方法重载查找几何图形的面积



class JavaExample
    void calculateArea(float x)
        System.out.println("Area of the square: "+x*x+" sq units");
    void calculateArea(float x, float y)
        System.out.println("Area of the rectangle: "+x*y+" sq units");
    void calculateArea(double r)
        double area = 3.14*r*r;
        System.out.println("Area of the circle: "+area+" sq units");
    public static void main(String args[]){
        JavaExample obj = new JavaExample();

        /* This statement will call the first area() method
         * because we are passing only one argument with
         * the "f" suffix. f is used to denote the float numbers

     /* This will call the second method because we are passing 
      * two arguments and only second method has two arguments

     /* This will call the second method because we have not suffixed
      * the value with "f" when we do not suffix a float value with f 
      * then it is considered as type double.


Area of the square: 37.21 sq units
Area of the rectangle: 220.0 sq units
Area of the circle: 116.8394 sq units

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Java 实例