Java: 2-dimensional char Array [closed]

Question

Closed. This question needs details or clarity. It is not currently accepting answers.

Want to improve this question? As written, this question is lacking some of the information it needs to be answered. If the author adds details in comments, consider editing them into the question. Once there's sufficient detail to answer, vote to reopen the question.

Closed 8 years ago.

Improve this question

i've been trying to programm a game called Sokoban the last few days. The levels of the game are simple .txt files you can swap. I've already read the .txt file by using BufferedReader but have problems with saving it to an 2-dimensional char array because the number of rows and columns are different each level. Someone told me to make use of charAt but how do i do that.

Sokobanlevel format (http://www.sokoban-online.de/help/sokoban/level-format.html)

Hope you can help me. Thanks.

String file = "...";
BufferedReader br = Files.newBufferedReader();
String line = null;
int rows = file.length;
int cols = file[0].length;
char[][] room = new char [rows][cols];          
while ((line = br.readLine()) != null) {
            System.out.println(room[rows][cols]);
        }

Use an arraylist. Or just use a CSV reader library. That's probably easier. — DejaVuSansMono
– DejaVuSansMono, Commented Dec 1, 2016 at 22:05
Possible duplicate of convert string to arraylist <Character> in java — Luke Kot-Zaniewski
– Luke Kot-Zaniewski, Commented Dec 1, 2016 at 22:05
@LucasKot-Zaniewski In theory it is yes, but I don't know if the OP will get it. — DejaVuSansMono
– DejaVuSansMono, Commented Dec 1, 2016 at 22:06
Thanks for answering that fast. I'll try using the arraylist for now. Cuz I've been programming for about one and a half week now, i don't know about CSV reader library yet. — T.T.N.
– T.T.N., Commented Dec 1, 2016 at 22:15

fabian · Accepted Answer · 2016-12-02 12:47:02Z

0

Without knowlege about the number of lines in the file you need to read everything from the file first to determine the number of lines. This would be easiest, if you use a List<char[]> to store char arrays for each line.

You could easily write something with the same functionality as a one-liner in java 8 though:

File fl = new File(file);
char[][] array = Files.lines(fl.toPath()).map(String::toCharArray).toArray(char[][]::new);

answered Dec 2, 2016 at 12:47

fabian

82.9k12 gold badges99 silver badges124 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Joe C · Accepted Answer · 2016-12-01 22:42:36Z

0

You can initialize 2D arrays so that each row has a different number of columns:

char[][] c = new char[7][];
c[0] = new char[5];
c[1] = new char[3];
//etc

answered Dec 1, 2016 at 22:42

Joe C

15.8k8 gold badges42 silver badges52 bronze badges

1 Comment

T.T.N. Over a year ago

The problem is that i cant write numbers in the [ ] cuz levels in txt-files could have the measure 3x3, 4x7 or something else. So i have to create a char Array for levels which are swapable and i dont know the measures.

Collectives™ on Stack Overflow

Java: 2-dimensional char Array [closed]

2 Answers 2

Comments

1 Comment

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Linked

Related