triangle.java

JSP实用教程源代码 本书从开发实践出发

package com.bean;
public class Triangle
{ double sideA,sideB,sideC;
  double area;
  boolean triangle;
  public void setSideA(double a)
   {sideA=a;
   }
  public double getSideA()
   {return sideA;
   }
  public void setSideB(double b)
   {sideB=b;
   }
  public double getSideB()
   {return sideB;
   }
  public void setSideC(double c)
   {sideC=c;
   }
  public double getSideC()
   {return sideC;
   }
  public double getArea()
   { double p=(sideA+sideB+sideC)/2.0;
     area=Math.sqrt(p*(p-sideA)*(p-sideB)*(p-sideC));
     return area;
   }
  public boolean isTriangle()
   {  if(sideA<sideB+sideC&&sideB<sideA+sideC&&sideC<sideA+sideB)
         triangle=true;
      else
         triangle=false;
      return triangle;
   }
  
}