Validate file extensions using regex

ValidateFileExtension.java

import java.util.regex.Matcher;
import java.util.regex.Pattern;

boolean validFile(String filename) {
	String FILE_PATTERN = "(.*(\\.(?i)(stk|tif))$)";
	Pattern pattern = Pattern.compile(FILE_PATTERN);
	Matcher matcher = pattern.matcher(filename);
	return matcher.matches();
}

System.out.println(""+validFile("path/to/ a file.bmp"));