/* package whatever; // don't place package name! */
 
import java.util.*;
import java.util.regex.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String foo1 = "this_is_a_filename";
		String foo2 = "this%is%not%a%filename";
		String foo3 = "%+!?";
 
		String regex = "[^a-zA-Z0-9æøåÆØÅ_ -]";
 
		Pattern p = Pattern.compile(regex);
		System.out.println("Foo1: " + p.matcher(foo1).find());
		System.out.println("Foo2: " + p.matcher(foo2).find());
		System.out.println("Foo3: " + p.matcher(foo3).find());
 
	}
}

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