Scanner sc=new Scanner(System.in);
String line=sc.nextLine();
String uc="";
Scanner line_sc=new Scanner(line);
while(line_sc.hasNext()) {
    String word=line_sc.next();
    uc+=Character.toUppercase(word.charAt(0))+ word.substring(1)+" ";
}
System.out.println(uc.trim());

String str = "input";
String capital = str.substring(0, 1).toUpperCase() + str.substring(1);

return str.equals(capital);

return Character.isUpperCase(str.charAt(0));