how to split string containing binary into array

Question

I am trying to do swa the bits but i have string which contains binary that is at first index[1] =1001 and at second index[2]=0010

I want TO swap there bits like

1001 and 0010 after bits swaps it becomes 1010 and 0001 and so on. 


for example
     A (array in string)
1.     1001
2.     0011
3.     1010
4.      0101
.
.
.    
now I want to swap the 1st two bits of 1 st string with 2nd string last 2 bits then 1st strings bit with 3rd so on
result :
     1011
     0001
     1000
     1011

I also applied this: String array[] = gf.split("\\", -1); but did not succeed

I just need to split the String into array. So just need help, thank you very much :)

see this post maybe http://stackoverflow.com/questions/1521921/splitting-words-into-letters-in-java — james, May 10 '14 at 13:58
I just need to knoe how will I split the string. I applied this but compiler asking replace with length — user3508182, May 10 '14 at 13:58
again asking change to length. I don't know why this is so. my compiler is ecilipse. — user3508182, May 10 '14 at 14:01

Kostas Kryptos · Answer 1 · 2014-05-10T14:07:36.327

0

If your Strings represent the binary data as String of {0,1} then to swap each character on all of your Strings in the index array, one of the greedy solutions would be to run replaceAll for all your Strings 3 times (one for temp)

for (String s: index)
    s = s.replaceAll("1","2").replaceAll("0","1").replaceAll("2","1");

edited May 10 '14 at 14:07

answered May 10 '14 at 14:02

Kostas Kryptos

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this will traverse the whole string? – user3508182 May 10 '14 at 14:12
give us an example of input vars and expected output – Kostas Kryptos May 10 '14 at 14:14
I have edited the code. I just need to split the string into array. I don't know why compiler not recognizing it :String array[] = gf.split("\\", -1); – user3508182 May 10 '14 at 14:23

score 0 · Accepted Answer · answered May 10 '14 at 14:30

0

Try the following for splitting your String:

String array[] = gf.split("(?!^)");

if you can work with Character[] you can simply do:

Character array[] = gf.toCharArray();

answered May 10 '14 at 14:30

Kostas Kryptos

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http://i62.tinypic.com/so4agw.jpg I have place the pic cannot invoke toCharArray() on the arry type string. – user3508182 May 10 '14 at 14:37
OK so gf is a String[], thought it was a single String, describe its values... for instance what is the value of gf[0]? – Kostas Kryptos May 10 '14 at 14:39
00001101 that the binery – user3508182 May 10 '14 at 14:42
Ok, so it is the String representation of a binary. And you have an array of String representation of some binaries. – Kostas Kryptos May 10 '14 at 14:43
It is a genetic crossover, do you need to crossover all the elements of gf and store them to array[]; – Kostas Kryptos May 10 '14 at 14:48

how to split string containing binary into array

2 Answers2