我想用scanner类读入for循环中的两个变量，然后将它们保存在一个集合中。代码如下：

public class Example{

public static void main(String args[]){

    Map<String,Integer> mapSub = new HashMap<String,Integer>();
      for (int i=0;i<nbSubnet;i++){
        System.out.println("Enter name of the subnet "+i+" : ");
        String nameSubnet = scanner.nextLine();
        System.out.println("Enter the size of the subnet "+i+" : ");
        int sizeSubnet = scanner.nextInt();

        mapSub.put(nameSubnet, sizeSubnet);
    }
  }
}

但我在运行代码之后得到了这个例外：

Enter name of the subnet 0 : 
Enter the size of the subnet 0 : 
IT
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at view.Main.main(Main.java:60)

任何帮助都很好谢谢