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Need Help with beginner Java programming.

Jose Vega

Joined: Jul 08, 2009
Posts: 1
Hi, I was wondering if anyone could help me out. I need to find out how to write a program that reads 3 real numbers from the keyboard and prints the in between number. If anyone can help me, reply here and I'll PM you. Thanks
fred rosenberger
lowercase baba

Joined: Oct 02, 2003
Posts: 11955

we don't really hand out answers here. We also prefer to use the forums, so that someone else can come along later and learn from what you did. taking it off-line (i.e. via emails or private messages) defeats the purpose of a forum.

But folks will bend over backwards to help you here.

so, what do you have so far? can you do anything? can you write/compile/run a simple 'hello world' program?

There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46367
And welcome to JavaRanch

Please don't just write "Need Help . . . " as your thread names: read this FAQ.
Jason Irwin
Ranch Hand

Joined: Jun 09, 2009
Posts: 327
Look at the method signature for the "main" method, you can see it has a String array. These get passed as command line arguments.
The number classes (Integer, Double etc) can all parse String values.
It is easy to do arithmetic with primitives (don't forget about the default return type!)
There is a very common way to as the System to print out a line of text onto the console.

Any good Java book will have examples or try it yourself and if it doesn't work, post your code and I am sure people will give more pointers.

ps I've tried to give you some clues.

I agree. Here's the link:
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