Get extension from Java filename

Java file-name, ,file pathfrom (e.g. time, place, numerical quantity)(filename) extensionRetrieve the

Java.file-namefrom (e.g. time, place, numerical quantity)(filename) extensionThe following is a sample source to obtain

sample program

/**
 * @param fileName returns the file extension from the filename.
 * @param fileName file name
 * @return file extension
 */
public static String getSuffix(String fileName) {
    if (fileName == null)
        return null;
    int point = fileName.lastIndexOf(".") ;
    if (point ! = -1) {
        return fileName.substring(point + 1); }
    }
    return fileName; }
}

Execution Result

◆Example of Execution

/**
 * Execution example
 * @param args
 */
public static void main(String[] args) {
    String ret1 = getSuffix("test.html");
    System.out.println(ret1);
    String ret2 = getSuffix("C:\\test.html");
    System.out.println(ret2);
}

◆Output result

html
html