Bin

BinString.java

import java.nio.charset.Charset;

public class BinString {
    public static void main(String[] args) {
        byte[] array = new byte[3];
        array[0] = (byte)0x9c;
        array[1] = (byte)0xff;
        array[2] = (byte)0xc9;
        String str1 = new String(array, Charset.forName("ISO-8859-1"));
        for (int i = 0; i < str1.length(); ++i) {
            System.out.printf("%04x %c\n", (int)str1.charAt(i), str1.charAt(i));
        }
        String str2 = new String(array, Charset.forName("UTF-8"));
        for (int i = 0; i < str2.length(); ++i) {
            System.out.printf("%04x %c\n", (int)str2.charAt(i), str2.charAt(i));
        }
    }
}

009c ?
00ff ?
00c9 ?
fffd ?
fffd ?
fffd ?