shapetriangle.java

来自「实例精华」· Java 代码 · 共 43 行

/**
*<DL><DT><b>功能：</b><DD>抽象类Shapes的子类I</DD></DL>
*@author Alex Wen
*@version V1.0 2003/12
*/
public class ShapeTriangle extends Shapes
{
	protected double a,b,c;
	public ShapeTriangle()
	{
		setSides(0.0,0.0,0.0);
	}
	
	public ShapeTriangle(double i,double j,double h)
	{
		setSides(i,j,h);
	}
	public void setSides(double x,double y,double z)
	{
		this.a=x;
		this.b=y;
		this.c=z;
	}
	/**
	*实现父类中的抽象方法
	*/
	public double perimeter()
	{
		return a+b+c;
	}
	public String getType()
	{
		return "三角形";		
	}
	public static void main(String args[])
	{
		ShapeTriangle st=new ShapeTriangle(3.0,4.0,5.0);
		System.out.println("形状："+st.getType());
		System.out.println("周长："+st.perimeter());
	}
	
}