How can I read an input which only contain the 26 upper case letter

Question

Are there any method that can read an input which only contain 1 character and it is in upper case too.
should I use readChar( ), or readString( )??
How should I implement them if I do use one of them?
thx

Answer 1

Try this :
import java.io.*;
public class Read
public static void main(String[] x)
System.out.println("Upper case char typed : "+readUpperCaseChar());
public static char readUpperCaseChar()
// method that read char and return the last upper case char
char x='\0',tmp='\0';
try
while(tmp!='\n')
tmp=(char) System.in.read();
if(tmp >= 'A' && tmp <= 'Z')
x=tmp;
catch(IOException ioex)
ioex.printStackTrace();
return x;