public class Triangle
{
\x09int a;
\x09int b;
\x09int c;
\x09public Triangle(int a,int b,int c){
\x09\x09this.a = a;
\x09\x09this.b = b;
\x09\x09this.c = c;
\x09\x09
\x09}
\x09
\x09public int getZhouChang(){
\x09\x09return a + b + c;
\x09}
\x09
\x09public double getArea(){
\x09\x09double area;
\x09\x09double s;
\x09\x09s=1.0/2*(a+b+c);
\x09\x09area = Math.sqrt(s*(s-a)*(s-b)*(s-c));
\x09\x09return area;
\x09}
\x09
\x09public boolean isTriangle(){
\x09\x09if(a + b > c || a + c > b || b + c > a){
\x09\x09\x09return true;
\x09\x09}else{
\x09\x09\x09return false;
\x09\x09}
\x09\x09
\x09}
}
打字辛苦的