Input in java

import java.util.Scanner;

Scanner reader = new Scanner(System.in);  // Reading from System.in
System.out.println("Enter a number: ");
int n = reader.nextInt(); // Scans the next token of the input as an int.
//once finished
reader.close();

ή

import java.util.Scanner;
Scanner scan = new Scanner(System.in);
String s = scan.next();
int i = scan.nextInt();