Transform String to byte then to int

Question

I found lots of questions about this topic but i was not able to solve my issue.

User will put a name String and I need to transform it to a List<int> to save it in database representing each character of the name.

It is working with latin wring system but this need to be working with other writing system such as arabic or cyrillic script.

List<Integer> intName = new ArrayList<>();
String splitName = currentName.split("");

for (final String currentString : splitConferenceName) {
    final byte[] temp = currentString.getBytes(StandardCharsets.UTF_8);
    final Byte b = temp[0];
    intName.add(b.intValue());
}

I also try to use ByteBuffer but got Bufferunderflowexception.

To check if the operator was good or not, I use this website : https://onlinestringtools.com/convert-decimal-to-string

Answer 1

You can use String.codePoints() method for this purpose:

String str = "Lorem ipsum";

int[] arr = str.codePoints().toArray();

System.out.println(Arrays.toString(arr));
// [76, 111, 114, 101, 109, 32, 105, 112, 115, 117, 109]

Then you can convert an array to the list, if necessary:

List<Integer> list = Arrays.stream(arr).boxed().collect(Collectors.toList());

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^{See also: How to convert String to bytestream}

Answer 2

Use String#chars():

List<Integer> intName = currentName.chars()
        .boxed().collect(toList());