How to split a string stream into different stream

Question

I have a string stream like 5AA50100FF1837d437d437d40000

I want to split like if it contains 0100FF18 then 37d4 37d4 37d4 0000 How to do this

I need to split the stream and do the computation for that splited stream

Answer 1

Try it like this. Once the target is found, use the index + target.length() to find the start of the desired string. Then, using find, find each grouping of four characters and stream the MatchResults, grabbing the matching group and return as an array. If no match of the target string, the array will be empty.

String target = "0100FF18";
String s = "5AA50100FF1837d437d437d40000";

String[] tokens = new String[0];
int index = 0;
if ((index = s.indexOf(target)) >= 0) {
    tokens = Pattern.compile("....")
            .matcher(s.substring(index + target.length())).results()
            .map(MatchResult::group).toArray(String[]::new);

}
System.out.println(Arrays.toString(tokens));

prints

[37d4, 37d4, 37d4, 0000]