Question

How to remove trailing nulls (0) from byte ArrayList in Java

Answer 1

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static List<Byte> removeTrailingNulls(List<Byte> byteList) {
        while (!byteList.isEmpty() && byteList.get(byteList.size() - 1) == 0) {
            byteList.remove(byteList.size() - 1);
        }
        
        return byteList;
    }

    public static void main(String[] args) {
        List<Byte> byteList = new ArrayList<>();
        byteList.add((byte) 1);
        byteList.add((byte) 2);
        byteList.add((byte) 3);
        byteList.add((byte) 0);
        byteList.add((byte) 0);
        byteList.add((byte) 0);
        byteList.add((byte) 0);

        List<Byte> trimmedList = removeTrailingNulls(byteList);

        for (Byte b : trimmedList) {
            System.out.print(b + " ");
        }
    }
}


/*
run:

1 2 3 

*/

 

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