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while(it.hasNext())
{
if(((Triangle)it.next()).isTriangle())
{
Triangle triangle=(Triangle)s.get(i);
System.out.print("三角形的形状是:");
System.out.print((triangle).getSide1()+" ");
System.out.print((triangle).getSide2()+" ");
System.out.println((triangle).getSide3()+" ");
System.out.print("三角形的面积是:");
System.out.println((triangle).findArea());
}
while(it.hasNext())
{ Triangle t = (Triangle)it.next();
if(t.isTriangle())
{
System.out.print("三角形的形状是:");
System.out.print(t.getSide1()+" ");
System.out.print(t.getSide2()+" ");
System.out.println(t.getSide3()+" ");
System.out.print("三角形的面积是:");
System.out.println(t.findArea());
}