The Java Docs for the method
String[] java.io.File.list(FilenameFilter filter)
includes this in the returns description:
The array will be empty if the directory is empty or if no names were accepted by the filter.
How do I do a similar thing and initialize a String array (or any other array for that matter) to have a length 0?
This question is related to
java
arrays
initialization
String[] str = {};
But
return {};
won't work as the type information is missing.
You can use ArrayUtils.EMPTY_STRING_ARRAY from org.apache.commons.lang3
import org.apache.commons.lang3.ArrayUtils;
class Scratch {
public static void main(String[] args) {
String[] strings = ArrayUtils.EMPTY_STRING_ARRAY;
}
}
String[] str = new String[0];
?
Ok I actually found the answer but thought I would 'import' the question into SO anyway
String[] files = new String[0];
or
int[] files = new int[0];
Make a function which will not return null instead return an empty array you can go through below code to understand.
public static String[] getJavaFileNameList(File inputDir) {
String[] files = inputDir.list(new FilenameFilter() {
@Override
public boolean accept(File current, String name) {
return new File(current, name).isFile() && (name.endsWith("java"));
}
});
return files == null ? new String[0] : files;
}
Source: Stackoverflow.com