Question

I am using java servlets. In my database some strings has characters Å, Ä and Ö. When i check those strings contains these special characters then its always false. How can i check if a string contains these special characters. I am using Eclipse. Thanks in advance.

Answer 1

These are extended ASCII chanracters.

byte[] data=new byte[1];
data[0]=(byte)197;  197 is for Å
String char1=new String(data,"ISO-8859-1");

You can create String “char1” like above and then Compare with Target String.

Code for Getting lookup :

for( int i=127;i < 256;i++)
        {
            byte[] char= new byte[1];
            char[0]= (byte)i;
            System.out.println("Data : "+char+","+
new String(char, "ISO-8859-1")+","+i); //'i' will give u code. 197 is for Å so on.
        }

See this table, Charset supported by Java SE 6 : Source : http://docs.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html

US-ASCII    Seven-bit ASCII, a.k.a. ISO646-US, a.k.a. the Basic Latin block of the Unicode character set
ISO-8859-1      ISO Latin Alphabet No. 1, a.k.a. ISO-LATIN-1
UTF-8   Eight-bit UCS Transformation Format
UTF-16BE    Sixteen-bit UCS Transformation Format, big-endian byte order
UTF-16LE    Sixteen-bit UCS Transformation Format, little-endian byte order
UTF-16  Sixteen-bit UCS Transformation Format, byte order identified by an optional byte-order mark