public static void main(String[] args){ // ancdef >> ncd111f uppercase a

Scanner sc=new Scanner(System.in);

System.out.print("Enter a username : ");

String username=sc.next();

String password=username.substring(1,4)+((int)(Math.random()*999)+111)+(char)(username.charAt(username.length()-1)-32)+(char)(username.charAt(0)+32);

System.out.println("Your username is "+username+" and password is "+password);

}