How do I substring this array?

Question

I have a char array that takes in a binary string of length n. It can only have 0s and 1s.

What I want to do is, I want to make a string array and store the first 2 values of the char array array jointly to the 1st index of this string array.

For example -

11011101

Is my char array. I want to convert it to an array that would be like -

newArray[0] = 11;
newArray[1] = 01;
newArray[2] = 11;
newArray[3] = 01;

So basically I just want to split every 2 integers and save them to the newArray in this manner.

My problem is

for (int j = 0; j < binaryString.length; j++) {
        lookUp[j] = binaryString.toString().substring(j, j+1);
    }

Which is just giving me the memory locations of the indexes.

Thanks in advance!

You do something like this to get a string from the chars, the rest you can probably figure out already :) String s = "" + binaryString[j] + binaryString[j + 1]; — Zavior
– Zavior, Commented Feb 24, 2014 at 1:04

Durandal · Accepted Answer · 2014-02-24 01:02:17Z

2

This is pretty easy to do using String.split.

This code:

char[] cArray = {'1','1','0','1','1','1','0','1'};
String arrayAsString = new String(cArray);
String[] stringArray = arrayAsString.split("(?<=\\G..)");
System.out.println(java.util.Arrays.toString(stringArray));

Prints this:

[11, 01, 11, 01]

answered Feb 24, 2014 at 1:02

Durandal

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