Java read elements in string element by element

Question

Ok I'm having some problems reading elements from a string, I'm given some user inputted file and I read every line into an arraylist. Now I need to access each line and read these integers from it and set them to int variables. There will be multiple integers per line though see sample below. Can someone help with this?

So for the first line I want to do something like:

first line:
int i = string.element1 // 1
int j = string.element2 // 5

...etc...

last line:
int i = string.element1 // 100
int j = string.element2 // 203

Christian Tapia · Accepted Answer · 2014-01-27 02:10:10Z

3

Try using the split() method to get Strings and then convert them to int via parseInt():

int i = 0, j = 0;
String string = "100 203";
String[] parts = string.split(" ");

i = Integer.parseInt(parts[0]);
j = Integer.parseInt(parts[1]);

answered Jan 27, 2014 at 2:10

Christian Tapia

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dacuna · Accepted Answer · 2014-01-27 02:12:58Z

3

ArrayList<String> yourArray...; //this is your array list containing all lines from your file
for(String data : yourArray){
    String[] nums = data.split(" ");
    Integer num1 = Integer.parseInt(nums[0]);
    Integer num2 = Integer.parseInt(nums[1]);
}

Something like that?

answered Jan 27, 2014 at 2:12

dacuna

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