Convertirn un char a string y esta string a mayusculas

[feelDweb]

Para convertir de caracter a String:

public class CharToString{
public static void main(String args[])throws IOException{
BufferedReader read =
new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter a Character:");
String s = read.readLine();
char c = s.charAt(0);
System.out.println("Character value is " + c);
String s1 = Character.toString(c);
System.out.println("String value is " + s1);
}
}

Para pasar el String a mayúscula se usa el método de objeto "toUpperCase()".