I want to make a high score saver in java with a text file, the file is called highscore. I wondered how to save an int if that int is larger than the one that is already in the file. Could someone please help?
JetLennit wrote ...
2013/9/2
Reading/Editing .txts
Key 'read write file' in the search box and check out some of the related discussions.
As danpost says a search is a good idea. But if you still need help, please make your questions more specific. A general answer to your question is:
1. Read the existing file and get the high score from it
2. Compare it to the current score
3. If the current score is higher, write it back to the file.
What I would like is a basic thing that is this word-code
How would i do that?
if(highscore.txt.getText().toInt() < score)
{
delete(highscore.txt, inJar());
writeWithText(highscores.txt, score.toString(), inJar());
}
What part are you having problems with?
The saving and loading of files or the interpretation of the data and checking whether the highscore values are higher that the current once?
Yes, I have never worked with this sort of thing and would like help with both.
Ok to read and write files you should use a suport class like my File Reader/Writer Demo. Using the methods from this project you can easily save and load files.
The interpretation of the data is the more difficult part.
To know who made a specific high score you need to save the name of the player with the score he/she reached.
Then you can compare the name of the player in the file with the name of the player that has done the new highscroe (using equals to compare the strings).
Then you have the score of this player as a string because in the txt file you can't realy store integers. To make the text an int you can use the method Integer.parseInt(String) which returns an int value of the string.
Now you can compare the score of the player with his/her current score and maybe change the value.
To save the new highscore you should load all the highscores (best would be to save them in a java.util.List object because this object is not static like arrays) and save all highscores again.
Therefore you should not save the strings in the List but create a new class that stores the name of the player and the score he/she reached.
Then you can also sort the list of values you have in your highscore table.
Hmm, by this:
You mean you want to write to a file that's within your jar file? That's not really possible.
delete(highscore.txt, inJar());
writeWithText(highscores.txt, score.toString(), inJar());
davmac wrote...
Hmm, by this:
delete(highscore.txt, inJar());
writeWithText(highscores.txt, score.toString(), inJar());
I'm not sure what you mean by that. The "jar" is a file (it's a "jar file"). It's not normally within another file. In any case, you can't normally write to it.
For example, lets say that the jar is in "C:\JarLocation\Jar.jar\" how would I save it to "C:\JarLocation\"?
If you want to save a text fiel from a jar file the text file is saved in the same folder where the jar file is located. But you can't realy write into the jar file.
For example, lets say that the jar is in "C:\JarLocation\Jar.jar\" how would I save it to "C:\JarLocation\"?
Ah, I see what you mean.
I think the first problem you have to solve is writing to a file generally.
To get the location of the jar file is tricky. In BlueJ (and Greenfoot) we use code something like:
Boot.class.getResource("Boot.class").toString()
... to get a kind of URL which has the location of the jar file (you can use any class name, it doesn't have to be Boot, but it must be inside the jar). The result looks something like this:
jar:file:/C:/home/bluej/bluej/lib/bluej.jar!/bluej/Boot.class
So you see it does contain the path to the jar file, but you need to extract it.You need to login to post a reply.