Java 扫描仪出错

下一行有问题，我不知道如何解决

System.out.println("Thats cool, I have thought that was a very interesting activity, how   many hours a week do you do that.");
String oftenHangOut = input.nextLine();

要读取int，你应该这样做

int oftenHangOut = Integer.parseInt(oftenHangOut);

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我在任何地方都看不到扫描仪对象；）但是，我认为，你想做这样的事情：

int oftenHangOut = input.nextInt();

或不进行分析：

    Scanner sc = new Scanner(System.in);
    System.out.println("Thats cool, I have thought that was a very interesting activity, how   many hours a week do you do that.");
    String oftenHangOut = sc.nextLine();
    int parsedInt = Integer.parseInt(oftenHangOut);
    if (parsedInt > 10) {
        System.out.println("Wow thats a lot you must love to do that.");
    } else {
        System.out.println("Cool, you must love to do that.");
    }

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好的技巧是使用试抓拦网。您将看到出现了什么问题，以及应用程序停止的原因

首先，您可以解释它应该做什么，以及它应该做什么。integer不是类名，而是integer

    Scanner sc = new Scanner(System.in);
    System.out.println("Thats cool, I have thought that was a very interesting activity, how   many hours a week do you do that.");
    String oftenHangOut = sc.nextLine();
    int parsedInt = Integer.parseInt(oftenHangOut);
    if (parsedInt > 10) {
        System.out.println("Wow thats a lot you must love to do that.");
    } else {
        System.out.println("Cool, you must love to do that.");
    }

    Scanner sc = new Scanner(System.in);
    System.out.println("Thats cool, I have thought that was a very interesting activity, how   many hours a week do you do that.");
    int oftenHangOut = sc.nextInt();

    if (oftenHangOut > 10) {
        System.out.println("Wow thats a lot you must love to do that.");
    } else {
        System.out.println("Cool, you must love to do that.");
    }