Thread: PLEASE HELP!!!!!!

I am new to java and really need help!!!!
I need to create a:
1. class triangle with a method to find the area of a triangle using three sides, only if they form a valid triangle.Otherwise display a message "Triangle cannot be formed".
2. class shapes having three functions with my the same name findArea(), but difference in arguments list to find area of circle, square and rectangle.
3. class to compute the profit or loss percentage based on the cost price and selling price of an item.


Thank You,
Regards Matt.

I need these for my java project. PS:im only 13 yrs old .
Please Help.

Well, im not getting stuck...lol
i dont know how to do them for i was absent when the explanation was going on sir.

i do only small projects without the args etc.
only like
public static void diplay findResult(int n,int x)
{
/then like/ double a,b,c;
/and then just system.out.println ...
thats it.
thank you

thank you,
i hadent seen that.

i did the class triangle but am not getting the boolean part of it. I have got the part where find the area, but have not got where it tells us to say "triangle cannot be formed".
My script until now is:

class Triangle
{
public static void findArea(int a,int b, int c)
{
double x=a*b*c/2;
double area= Math.sqrt(x*x-a*x-b*x-c);
System.out.println("Area="+area);
}
}

uhm, maybe just putting in the required things needed, and if it meets up, just give the area, and if it doesnt, say triangle cannot be formed....not quite get wht u mean though...

when a+b<c
b+c<a and a+c<b, triangle cannot be formed.

but if instead of these, we use:a+b>c
b+c>a and a+c>b
ittl work.

when two sides are greater than the other, a triangle can be formed. when they are not, it cannot.

i havent actually learnt that if statement and boolean literal, thats wht i need help in.

omg...ty sooo much!!!! i got it!!!!! yay!!!

ok, yh i didnt quite get it lol...

my program:
class Triangle
{
public static void findArea(int a,int b, int c)
{
if a+b>c,a+c>b,b+c>a
{
double x=a*b*c/2;
double area= Math.sqrt(x*x-a*x-b*x-c);
System.out.println("Area="+area);
}
{
if a+b<c,a+c<b,b+c<a
{
System.out.print("Triangle cannot be formed");

}
}

the error is on if a+b>c,a+c>b,b+c>a and it says "(' unexpected..

class Triangle
{
public static void findArea(int a,int b, int c)
{
if (a+b>c);
{
double x=a*b*c/2;
double area= Math.sqrt(x*x-a*x-b*x-c);
System.out.println("Area="+area);
}

if (a+c>b);
{
double x=a*b*c/2;
double area= Math.sqrt(x*x-a*x-b*x-c);
System.out.println("Area="+area);

}
if (b+c>a);
{
double x=a*b*c/2;
double area= Math.sqrt(x*x-a*x-b*x-c);
System.out.println("Area="+area);
}

if (a+b<c);
{
System.out.println("Triangle cannot be formed");
}
if (a+c<b);
{
System.out.println("Triangle cannot be formed");
}
if (b+c<a);
{
System.out.println("Triangle cannot be formed");
}
}
}

my final script, finally compiled and worked ^^ tysm kevin workman!!!!

As Kevin said u still lack of some syntax; like for example think about joining some if, and put multiple conditions, u have two comands: "||" = or , "&&" = and, these are some of them, and cotting KevinWormand, watch out for the semicolons.

and wht are highlinght tags????