public class StringTest3 { public static void main(String[] args){String s = "290ADmin092" ;StringBuffer cc=new StringBuffer();for (int i = 0; i < s.length(); i++) { String b=String.valueOf(s.charAt(i)); if(b.matches("[a-z]")){
cc.append(b.toUpperCase()); }else if(b.matches("[A-Z]")) {
c
