When the -encoding switch is used, jikes accepts only ascii characters. It
seems that libiconv isn't able to convert non-ascii characters to wchar_t.

How-To-Repeat: 
% cat > test.java
public class test {
	public static void main(String[] args) {
		System.out.println("åäö");
	}
};
% jikes -encoding iso8859-1 test.java
Charset conversion error at offset 87: Illegal byte sequence
Charset conversion error at offset 87: Illegal byte sequence

Found 1 lexical error in "test.java":

		 3.     System.out.println("
															 ^
*** Lexical Error: String constant not properly terminated.

Found 4 syntax errors in "test.java":Charset conversion error at offset 87: Illegal byte sequence


		 3.     System.out.println("
															^^
*** Syntax Error: ")" inserted to complete Arguments


		 3.     System.out.println("
						^------------------^
*** Syntax Error: ";" inserted to complete BlockStatements


																								 <
		 2.   public static void main(String[] args) {
		 3.     System.out.println("
				----------------------->
*** Syntax Error: "}" inserted to complete MethodBody


													<
		 1. public class test {
	 . . .
		 3.     System.out.println("
				----------------------->
*** Syntax Error: "}" inserted to complete ClassBody