所以我在6个小时内完成了这个庞大的项目，虽然我没有编写所有将要读取的文件，但我正在设置所有的if语句。您看到我正在创建一个数据库，其中用户输入3个数字，作为回报，将获得一个读出的文件。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.");
}
}
错误说它应该是其他的，但是当我把if旁边的时候我自动得到100个错误。我该怎么办？
答案 0 :(得分：4)
如果所有if块都是独占的，那么使用if-else总是好的做法。话虽如此，上述错误是由于错过了“}”
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.");
}
}
答案 1 :(得分：0)
条件没有结束}：if (enemies_4 == 2)，您需要添加}
答案 2 :(得分：0)
对我来说，看起来第一个if-condition错过了右括号。
if (choose == 4) //enemies from the original Kingdom Hearts II
{
} // This is missing.
如果这个条件块看起来没问题，那么你应该在下面的块中寻找缺少的右括号。
if (enemies_4 == 2) //allows the user to view all of the Nobodies in KH2
{
} // This is missing.
正确缩进代码非常重要。如果您使用的是Eclipse或任何其他IDE，那么只需单击一下即可管理代码缩进。只要您在代码窗口中选择代码，Control + Shift + F就会执行此操作。
此外，您应该注意使用if-else-if或switch-case块来优化条件。使用正确的必需块可以减少出错的可能性。
if-else优化的示例如下所示。
Java if statement checking Java if statement checking
Shishir
答案 3 :(得分：0)
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 miss this
else
{
System.out.println("Please input a number which corresponds to an enemy.");
}
}