Java中输入的用法

import java.io.Console;
import java.lang.System;
import java.util.*;


/**
 * This program demonstrates console input
 * @version 1.10 2014-8-5
 * @author Administrator
 *
 */
public class InputTest {
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		
		// get first input
		System.out.print("What is your name?");
		String name = in.nextLine();
		
		// get second input
		System.out.print("How old are you?");
		int age = in.nextInt();
		
		// display output to console
		System.out.println("Hello, " + name + ". New year you will be " + (age + 1));
		
		Console  cons = System.console();
		if(cons != null)
		{
			System.out.print("User Name：");
			String username = cons.readLine();
			
			System.out.print("Password: ");
			char[] passwd = cons.readPassword();
		}
		else
		{
			System.out.println("Console object is null");
		}
	}
}