Java equivalent of PHP's implode(',' , array_filter( array () ))

Question

I often use this piece of code in PHP

$ordine[\'address\'] = implode(\', \', array_filter(array($cliente[\'cap\'], $cliente[\'citta\'], $cliente[\'provincia\'         


        

Answer 1

You'd have to add your strings to an ArrayList, remove empty ones, and format it accordingly:

public static String createAddressString( String street, String zip_code, String country) {
    List list = new ArrayList();
    list.add( street);
    list.add( zip_code);
    list.add( country);

    // Remove all empty values
    list.removeAll(Arrays.asList("", null));

    // If this list is empty, it only contained blank values
    if( list.isEmpty()) {
        return "";
    }

    // Format the ArrayList as a string, similar to implode
    StringBuilder builder = new StringBuilder();
    builder.append( list.remove(0));

    for( String s : list) {
        builder.append( ", ");
        builder.append( s);
    }

    return builder.toString();
}

Additionally, if you had String[], an array of strings, you can easily add them to an ArrayList:

String[] s;
List list = new ArrayList( Arrays.asList( s));