The ISO2022CN and ISO2022KR converters do not handle invalid escape sequences correctly. They throw an ArrayIndexOutOfBoundsException when illegal/malformed
escapes are encountered within an input stream. Note: This is one of a number
of bugs resulting from a distillation of BugID 4296969, Incorrect behaviour of
several character converters.

The following test case will demonstrate this behaviour:

/*
 * Runtime exceptions generated when illegal ISO2022 escapes
 * are provided within an input stream to be decoded
 */

public class InvalidEscapes {
 
  public static void main(String[] args){

        for (int i = 0; i < encodings.length; i++){
            test(encodings[i]);
        }

        try {
            byte[] bb = new byte[] {(byte)0x1b, (byte)')', (byte)'x'};
            String str = new String(bb,"ISO2022CN");
        } catch (Throwable th){
            System.err.println("ISO2022CN error " + th);
        }

        try {
            byte[] bb = new byte[] {(byte)0x1b, (byte)')', (byte)'x'};
            String str = new String(bb,"ISO2022KR");
        } catch (Throwable th){
            System.err.println("ISO2022KR error " + th);
        }

    }
 }

Ian.Little@Irleland 3/23/2001.