Get file extension

get_extension.java

import java.io.File;

/**
 * Retorna a extensão do arquivo.
 *
 * @param file
 * @return string Extensão
 */
public static String getExtension(String file) {
	return file.substring(file.lastIndexOf(".") + 1, file.length());
}

Shouldn't file be path as you are not actually passing a file object but a String path? Regardless I was able to get this to work just fine.

Yes, can be!