ReadInputByCharacter.java

import java.util.*;
import java.io.*;

class ReadInputByCharacter {

  public static void main(String[] args) throws Exception {

    InputStreamReader isr = new InputStreamReader(System.in);
    BufferedReader br = new BufferedReader(isr);

    int n;
    while ((n = br.read()) != -1) {
      char c = (char) n;
      System.out.print(c);
    }
    System.out.println();
    br.close();

  }

}