Java tutorial
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Main { public static void main(String args[]) throws IOException { String data, answer = ""; BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); System.out.println("Enter any String : "); data = br.readLine(); char[] findupper = data.toCharArray(); for (int i = 0; i < findupper.length; i++) { if (findupper[i] >= 65 && findupper[i] <= 91) // ascii value in between 65 // and 91 is A to Z { answer += findupper[i]; // adding only uppercase } } System.out.println("Answer : " + answer); } }