java - 在Java中，为什么会收到错误消息，提示我是否需要其他？

Question

因此，我要在6个小时内完成这个庞大的项目，尽管我还没有对将要读取的所有文件进行编码，但是我正在设置所有if语句。您会看到我正在建立一个用户在其中输入3个数字的数据库，作为返回，该文件将以输出格式读取文件。到目前为止，一切似乎都很好，除了底部显示的其他内容:

 if (choose == 4) //enemies from the original Kingdom Hearts II
           {
            System.out.println("Please select the enemy race you wish to view:");
            System.out.println("1. Heartless");
            System.out.println("2. Nobodies");
            int enemies_4 = kH.nextInt();

        if (enemies_4 == 1) //Allows the user to select which kinds of Heartless to view from Kingdom Hearts II.
        {
            System.out.println("Please type the number which corresponds to the Heartless enemy type.");
            System.out.println("1. Pureblood");
            System.out.println("2. Emblem");
            System.out.println("3. Gummi");
            int heartless_4 = kH.nextInt();

            if (heartless_4 = 1) //allows the user to view Pureblood Heartless from KH2
            {

            }

            if (heartless_4 == 2) //allows the user to view the Emblem Heartless in KH2
            {

            }

            else
            {
                System.out.println("Please enter a number which corresponds to one of the Heartless types KH2.");
            }
        }


        if (enemies_4 == 2) //allows the user to view all of the Nobodies in KH2
        {
            System.out.println("Please type the number which corresponds to the Nobody enemy type.");
            System.out.println("1. Lower");
            System.out.println("2. Gummi");
            int nobodies_4 = kH.nextInt();

            if (nobodies_4 == 1) //Gives the selection of the Lower Nodies in Kingdom Hearts II.
            {

            }

            if (nobodies_4 == 2) //Gives the selection of the Gummi Nobodies, which are ONLY in Kingdom Hearts II
                                //(as well as the Final Mix version of it).
            {

            }

            if (nobodies_4 == 3) //Give the selection of all he members of Organization XIII which appear in
                                    //Kingdom Hearts II.
            {

            }

            else
            {
                System.out.println("Please enter a number which corresponds to one of the Nobody types KH2.");
            }

        else
        {
            System.out.println("Please input a number which corresponds to an enemy.");
        }
    }

该错误表明应该是else if，但是当我将if放在它旁边时，我会自动得到100错误。我该怎么办？

Answer 1

如果所有if块都是互斥的，则始终使用if-else是一个好习惯。话虽如此，以上错误是由于缺少“}”

if (choose == 4) //enemies from the original Kingdom Hearts II
       {
        System.out.println("Please select the enemy race you wish to view:");
        System.out.println("1. Heartless");
        System.out.println("2. Nobodies");
        int enemies_4 = kH.nextInt();

    if (enemies_4 == 1) //Allows the user to select which kinds of Heartless to view from Kingdom Hearts II.
    {
        System.out.println("Please type the number which corresponds to the Heartless enemy type.");
        System.out.println("1. Pureblood");
        System.out.println("2. Emblem");
        System.out.println("3. Gummi");
        int heartless_4 = kH.nextInt();

        if (heartless_4 = 1) //allows the user to view Pureblood Heartless from KH2
        {

        }

        if (heartless_4 == 2) //allows the user to view the Emblem Heartless in KH2
        {

        }

        else
        {
            System.out.println("Please enter a number which corresponds to one of the Heartless types KH2.");
        }
    }


    if (enemies_4 == 2) //allows the user to view all of the Nobodies in KH2
    {
        System.out.println("Please type the number which corresponds to the Nobody enemy type.");
        System.out.println("1. Lower");
        System.out.println("2. Gummi");
        int nobodies_4 = kH.nextInt();

        if (nobodies_4 == 1) //Gives the selection of the Lower Nodies in Kingdom Hearts II.
        {

        }

        if (nobodies_4 == 2) //Gives the selection of the Gummi Nobodies, which are ONLY in Kingdom Hearts II
                            //(as well as the Final Mix version of it).
        {

        }

        if (nobodies_4 == 3) //Give the selection of all he members of Organization XIII which appear in
                                //Kingdom Hearts II.
        {

        }

        else
        {
            System.out.println("Please enter a number which corresponds to one of the Nobody types KH2.");
        }
     } // You were missing this
    else
    {
        System.out.println("Please input a number which corresponds to an enemy.");
    }
}