Tagged Questions

3
votes
2answers
68 views

Sorting a 2d String Array in Java

I created a 2d-array in Java for a project that reads in a file, processes the data, and the prints it back out. The only problem I am having is trying to sort the 2d-array alphabetically. This is an ...
-2
votes
1answer
40 views

Java Scanner and Multidimensional Arrays [closed]

I'm having some trouble figuring out why this isn't working. Any ideas? try { Scanner scanner = new Scanner(new File("/Users/xxxxxxx/Desktop/baseball_in.txt")); String[][] ...
0
votes
3answers
60 views

java two-dimensional array, how do I remove selected rows

I really new to java and I've Googled this in every possible phrase i know how. So I have a table made of 36 rows and 12 columns, I've been trying to write a method that will delete the a row when ...
0
votes
3answers
42 views

Number of columns in 2d array declaration

I want to read a text file and insert it into a 2d array. Here is my code. List<String> list2 = new ArrayList<String>(); String thisLine = null; while ((thisLine ...
0
votes
1answer
60 views

Multi-dimensional arrays: Variable length row?

It is possible to do variable length columns such as: private int k[][] = new int[3][]; for(int i = 0; i < k.length; i++) { k[i] = new int[i+1]; } I was wondering if it was possible to do ...
0
votes
5answers
77 views

How can I transform a List of List (multidimensional List) to an Array of Array(multidimensional Array)?

I have written this code, but at run time I have this error: [Ljava.lang.Object; cannot be cast to [[Ljava.lang.String; please help me, thanks!!! public java.util.List<String> ...
0
votes
2answers
49 views

Java Null Pointer Exception in multi dimensional array

Alrighty, First post here so yell at me if I'm doing something wrong but I have the following code, the attempt is to make a zone builder kind of deal for one of those old school circle mud's. ...
0
votes
1answer
47 views

How to sort a large text file's data into a multi-dimensional array?

I have a very large data file. It starts off with a big paragraph that I want to ignore or remove from the equation, then it has a year e.g. 1974, then 6 spaces, then a number to represent a month, ...
1
vote
2answers
36 views

How to get rid of text at the start of a string?

I have a text file, and it starts off with some text before getting to the data that I need for my program. How do I go about getting rid of this text and pick up only the data behind it? The file ...
0
votes
1answer
32 views

How to map an array index to a certain date?

I want to map an index from my 3D array to a date. I have an array (sortedData[34][12][31]) and I would like to have it so that if a date is selected from JCalendar it corresponds to the correct index ...
2
votes
0answers
47 views

3d array An exception occurred processing JSP page

I'm trying to create a 3 dimensional array with some values from database, but I'm getting an error that doesn't tell me too much. Any idea what it can be? db_pstackNr is a string formed by numbers ...
0
votes
2answers
42 views

How to sort a large text file into a multi-dimensional array?

I'm trying to read a large text file and sort it into a 3D array using scanner() but I don't think the array is being populated, and I keep getting the error java.lang.NullPointerException, but I ...
0
votes
2answers
46 views

(Android) Passing multidimensional array through intent

I want to pass a multidimensional array to an activity multidimensional array: double[][][] speed = new double[][][] { { { 15, 10 }, { 16, 12 } }, { { 14, 50 }, ...
0
votes
2answers
37 views

Multidimensional Array Computation

I'm trying to compute the largest product amongst four adjacent numbers (integers) in a 20x20 grid. This is what I have so far... /** * The maxProduct method is used to compute the largest product ...
2
votes
2answers
53 views

Concatenation of multidimensional string arrays in java

I wish to print the contents of String[][] myArray using only one print statement. Obviously the array can be printed easily by looping through it, but for the sake of clean log files, I'd like the ...

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