Error using split function and removing certain characters from a java file

Question

The idea is to separate pieces with the split function that does not contain spaces, comma, point and comma, etc. But the function does not separate correctly, separating most of the time only space.

public String[] getTokens(String s)
{
    String[] tokens;
    tokens = s.split(",");
    tokens = s.split(" ");
    int pos = 0;
    for(int i = 0; i < tokens.length; i++)
    {
        if(tokens[i].equals(";") || tokens[i].equals(","))
        {
            tokens[i] =" ";
            pos = i;
            break;
        }
    }

public void execute()
{
    File[] filesArray = dt.returnFiles();
    for(File f : filesArray)
    {
        try
        {
            fileContent = dt.loadFile(f);

            for(int i=0; i < fileContent.size(); i++)
            {

                if(fileContent.get(i).equals(",") || fileContent.get(i).equals(";") || 
                        fileContent.get(i).isEmpty())
                {
                    fileContent.remove(i);
                }

            }