重载实例

//借鉴的^^
class Matharea {//创建一个类
	public int area(int lang, int width) {					//求四边形面积
		int rectangular = lang * width;
		return rectangular;							//返回结果值
	}
	public float area(double top, double bottom, double high) {//求梯形面积
		float trapezoidal = (float) ((top + bottom) * high / 2);	//进行强制类型转换，将double转换成float
		return trapezoidal;							//返回结果值
	}
	public String area(int r) {							//求圆的面积
		float circular = (float) 3.14 * r * r;				//进行强制类型转换，将double转换成float
		return "这是圆的面积  " + circular;				//返回结果值
	}
}
public class Overload {
	public static void main(String[] args) {
		Matharea ma = new Matharea();			//创建Matharea的实例对象
		System.out.println(ma.area(5, 11.2, 5));		//打印结果
	}
}