Inserting string ›ÄX%ß=dÜgž=ŒT8ï8L]4C®° into sql shows error

Inserting string ›ÄX%ß=dÜgž=ŒT8ï8L]4C®° into sql shows error

here is my code key = KeyGenerator.getInstance(algorithm).generateKey();
byte[] keyBytes = key.getEncoded();
String k=new String(keyBytes);
Class.forName("com.mysql.jdbc.Driver");
con=DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");
Statement st=con.createStatement();
rs=st.executeQuery("select tid from tid");
while(rs.next())
{
mid=Integer.parseInt(rs.getString(1));
b=Integer.toString(mid);
++mid;
a=Integer.toString(mid);
}
out.println(k);
ps= con.prepareStatement("insert into key values (?,?)");
ps.setString(1,a);
ps.setString(2,k);
ps.executeUpdate();
And the error is javax.servlet.ServletException:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an
error in your SQL syntax; check the manual that corresponds to your MySQL
server version for the right syntax to use near 'key values
('8','›ÄX%ß=dÜgž=ŒT8ï8L]4C®°')' at line 1/p