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Re: Java Game - Battleship

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AgentFirefox is not online. AgentFirefox
Top 100 Poster
Joined: 20 Jun 2008
Total Posts: 22404
10 Feb 2012 04:21 PM
I need to make a Battleship game for a project in my Java class. I'm wondering if there's a better way to go about it than using two-dimensional arrays. I'm going to have the user be able to place their ships, rotating and moving them to their desire.

Basically, I just have a size field (number of spaces it occupies), a position field (array of integers of length two), and a direction field (string representing Left, Right, Up, and Down). I use a numeric for loop to determine if the ship is occupying a coordinate or if the ship cannot move to a desired location.

Any suggestions?
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Legend26 is not online. Legend26
Joined: 08 Sep 2008
Total Posts: 10586
10 Feb 2012 04:36 PM
There's nothing wrong with using two-dimensional arrays for this. I just sincerely hope that you are hiding the arrays as a private variable in a class with methods that give you easy control over it.
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SDuke524 is not online. SDuke524
Joined: 29 Jul 2008
Total Posts: 6267
10 Feb 2012 04:42 PM
Well battleship works off a grid-system so I can't see any other, efficient, way of doing it.
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AgentFirefox is not online. AgentFirefox
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Joined: 20 Jun 2008
Total Posts: 22404
10 Feb 2012 04:42 PM
Yes, of course. :P
All the "sensitive" data is private.
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crazyman32 is online. crazyman32
Joined: 13 Apr 2008
Total Posts: 18027
10 Feb 2012 04:46 PM
In my Java class, all we are doing is simple println things like printing our name and stuff. You're making Battleship.

Can I transfer to your class?
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AgentFirefox is not online. AgentFirefox
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Joined: 20 Jun 2008
Total Posts: 22404
10 Feb 2012 06:54 PM
Haha.

To be honest, I'm going beyond the project requirements by creating a human vs pc Battleship. We were just supposed to make a Battleship game to sink all boats in the fewest amount of turns; there is no computer output in the project.

But I like AI. :)
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swmaniac is not online. swmaniac
Joined: 28 Jun 2008
Total Posts: 15773
10 Feb 2012 07:07 PM
Lucky, my AP Computer science (Basically Java programming) is introductory level at best. :/

Although I did figure out how to write to files today... that was at least good.
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AgentFirefox is not online. AgentFirefox
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Joined: 20 Jun 2008
Total Posts: 22404
10 Feb 2012 07:09 PM
"Although I did figure out how to write to files today... that was at least good."

<3
I just got an idea.
Game log!

File writing is very important. Which did you use, PrintWriter or FileWriter?
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swmaniac is not online. swmaniac
Joined: 28 Jun 2008
Total Posts: 15773
10 Feb 2012 07:18 PM
PrintWriter.

I just dumped a bunch of random characters into a file. :/ Nothing useful yet.
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SDuke524 is not online. SDuke524
Joined: 29 Jul 2008
Total Posts: 6267
10 Feb 2012 07:22 PM
My computer science class is where I do ALL my homework. My teacher knows I can program so she just lets me. Although on the final for the first semester, we were supposed to draw a snowman however, she expected a full-out 3D game from me. -_-
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swmaniac is not online. swmaniac
Joined: 28 Jun 2008
Total Posts: 15773
10 Feb 2012 07:24 PM
Yeah, I kinda regularly finish the week's work in half a period.
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AgentFirefox is not online. AgentFirefox
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Joined: 20 Jun 2008
Total Posts: 22404
10 Feb 2012 07:24 PM
Ah.

When using PrintWriter, you automatically overwrite the file, even if it exists. If you want to append to the file, you need to use a FileWriter.


FilerWriter fw = new FileWriter("FileName.txt", true);
// Note, if you instantiate a FileWriter using false, it overwrites the file by default.
PrintWriter fileOut = new PrintWriter(fw);
// Notice the input is the FileWriter object, NOT a string.



You can also check to see if a file exists using the File object.



File theFile = new File("FileName.txt")
if (theFile.exists()) {
    System.out.println("The file exists!");
}



You can also input a File object as the argument when instantiating a File/PrintWriter object. Remember, PrintWriter ALWAYS overwrites the existing file with a blank file.


File theFile = new File("FileName.txt");
FileWriter fw = new FileWriter(theFile, true);
PrintWriter fileOut = new PrintWriter(fw);

fileOut.println("Appending to the old file!");
fileOut.close();



Don't forget to call the close method of the PrintWriter object before you exit the program.
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SDuke524 is not online. SDuke524
Joined: 29 Jul 2008
Total Posts: 6267
10 Feb 2012 07:24 PM
@swm
10 minutes. ^_^
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swmaniac is not online. swmaniac
Joined: 28 Jun 2008
Total Posts: 15773
10 Feb 2012 07:27 PM
@Agent

I'm sort of curious, how are you making battleship, Swing or something different?
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AgentFirefox is not online. AgentFirefox
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Total Posts: 22404
10 Feb 2012 07:35 PM
Pure console. XD
Will be the most epic console Battleship in the universe!

I don't know enough of the swing library yet. Otherwise, I WOULD use GUIs.
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swmaniac is not online. swmaniac
Joined: 28 Jun 2008
Total Posts: 15773
10 Feb 2012 07:40 PM
Pure console battleship...
XD

What could possibly go wrong?
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Legend26 is not online. Legend26
Joined: 08 Sep 2008
Total Posts: 10586
10 Feb 2012 07:49 PM
^ If it was in C++, you'd be amazed. T_T

As it's said, C++ is like shooting yourself in the foot.
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swimguy777 is not online. swimguy777
Joined: 30 May 2009
Total Posts: 17092
10 Feb 2012 08:45 PM
At least you guys HAVE programming classes. Our only 'programming' class is Web Page Design, where you learn barely any HTML, no Javascript or CSS. I seriously learned the first month's worth of HTML in 3 days. Then I went and learned Javascript and CSS in class while she explained to everyone how make text bold.

According to my teacher, I'm some sort of 'prodigy' who will be a professional at some point.

I'm not an excellent programmer, it's just that everyone else in my school only has enough computer knowledge to use Facebook :\

-[::ƧѡÎḾḠΰῩ::]-[::Maker of stuff and Helper of Scripting::]-
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Legend26 is not online. Legend26
Joined: 08 Sep 2008
Total Posts: 10586
10 Feb 2012 09:12 PM
"At least you guys HAVE programming classes."

The closest my school gets is a class to learn about MS Word.
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smurf279 is not online. smurf279
Joined: 15 Mar 2010
Total Posts: 6871
10 Feb 2012 09:15 PM
I think all my school has is powerpoint :/

Anyways this battleship game sounds pretty cool
Maybe you should share it with us when you finish ^_^
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Shrimp1789 is not online. Shrimp1789
Joined: 01 Feb 2011
Total Posts: 1935
10 Feb 2012 09:53 PM
UR ALL LUCKY I DONT EVEN HAVE A CLASS I HAZ TO LEARN FROM NOOBISH FW33 MAWDZ!!!!!!!!!(which helps......not all the time...)
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darkkiller5555 is not online. darkkiller5555
Joined: 22 Nov 2009
Total Posts: 6359
10 Feb 2012 10:03 PM
Ack, you guys are lucky. I'm in the most technically illiterate area of the world as far as I can see. I don't even think they have a class relating to technology within 100 miles of where I live.
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AgentFirefox is not online. AgentFirefox
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Joined: 20 Jun 2008
Total Posts: 22404
10 Feb 2012 10:06 PM
Just to clear things up about my class, it's a college class. I got the chance to take college classes during high school. :)

So yeah, it's not like I'm being taught at the high school. There's only one teacher at my school that knows ANYTHING about programming, and he's a math teacher. XD
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AgentFirefox is not online. AgentFirefox
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Joined: 20 Jun 2008
Total Posts: 22404
10 Feb 2012 10:10 PM
"Maybe you should share it with us when you finish ^_^"

You'll have to download a Java IDE like Eclipse or NetBeans (both are really nice, but NetBeans takes a while to install, but I had to also get the full JDK for the NetBeans program). Both programs can run off a flash drive, and you CAN put the Java stuff on the flash drive as well. This enables use on ANY compatible computer in the operating system you use.

I can post the source code here after it has been graded by the professor. :P
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darkkiller5555 is not online. darkkiller5555
Joined: 22 Nov 2009
Total Posts: 6359
10 Feb 2012 10:10 PM
Oh :o Cool. However, I still feel like I'm in a technically illiterate area..I'm moving to Canada when I'm older. They have a better educational system there. My friend who lives there is currently in high school, and they have a programming class. Apparently programming classes are more common than not there.


Not to offend any hardcore patriots of America, but Canada has a way better educational system as far as I'm concerned.
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