save input from text file to array

Question

How to save text file content to different arrays?

my text file content is like this;

12 14 16 18 13 17 14 18 10 23
pic1 pic2 pic3 pic4 pic5 pic6 pic7 pic8 pic9 pic10
left right top left right right top top left right
100 200 300 400 500 600 700 800 900 1000

how can I save each line into different array? e.g.

line 1 will be saved in an array1
line 2 will be saved in an array2
line 3 will be saved in an array3
line 4 will be saved in an array4

Answer 1

Solution 1

List<String[]> arrays = new ArrayList<String[]>(); //You need an array list of arrays since you dont know how many lines does the text file has
try {
 BufferedReader in = new BufferedReader(new FileReader("infilename"));
 String str;
 while ((str = in.readLine()) != null) {
 String arr[] = str.split(" ");
 if(arr.length>0) arrays.add(arr);
 }
 in.close();
 } catch (IOException e) {
 }

At the end arrays will contain every array. In your example arrays.length()==4

To iterate over the arrays:

for( String[] myarr : arrays){
 //Do something with myarr
}

Solution 2: I don't think this is a good idea but if you are sure the file always is going to contain 4 lines you can do this

String arr1[];
String arr2[];
String arr3[];
String arr4[];
try {
 BufferedReader in = new BufferedReader(new FileReader("infilename"));
 String str;
 str = in.readLine();
 arr1[] = str.split(" ");
 str = in.readLine();
 arr2[] = str.split(" ");
 str = in.readLine();
 arr3[] = str.split(" ");
 str = in.readLine();
 arr4[] = str.split(" ");
 in.close();
 } catch (IOException e) {
 }

• Jessy: Thanks, but what I mean is that the every line will be saved in different array. e.g. I will have 4 different arrays with the sizes of 10 each. Not in the same array.
• Jessy: e.g. there are 4 lines in the txt file will create 4 arrays. each array will have the size if 10. and each elements on the array can be called as e.g. array1.get(i)
• Enrique: I have updated the answer to iterate over the 4 arrays. Are you always going to have 4 arrays?
• Jessy: THANK YOU.. yes the text file will always contained 4 lines..:-)

Answer 2

look at String[] split