线程“main”中的异常 java.util.InputMismatchException
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Exception in thread "main" java.util.InputMismatchException
提问by ???
I`m MAC user and I have been struggling with this error. I search this error, now I just can't find solutions.
我是 MAC 用户，我一直在为这个错误而苦苦挣扎。我搜索这个错误，现在我找不到解决方案。
Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:864)
at java.util.Scanner.next(Scanner.java:1485)
at java.util.Scanner.nextInt(Scanner.java:2117)
at java.util.Scanner.nextInt(Scanner.java:2076)
at GradeBook.inputGrades(GradeBook.java:53)
at GradeBookTest.main(GradeBookTest.java:12)
It is Not a problem of the variable, and the code written As recorded in the book .
不是变量的问题，和书上写的代码一样。
回答by Touchstone
Check the following thing and also check whether you are respecting the rules:
检查以下事项并检查您是否遵守规则：
public int nextInt()
Throws:InputMismatchException - if the next token does not match the Integer regular expression, or is out of range
抛出：InputMismatchException - 如果下一个标记与 Integer 正则表达式不匹配，或者超出范围
For more details about nextmethod visit:
有关下一个方法的更多详细信息，请访问：
http://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html
http://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html
回答by Shaik Mohammed Saifullah
If you are using Switch case in the above program then give a space between switch and condition.
如果您在上述程序中使用 Switch case，则在 switch 和 condition 之间留一个空格。
Dont write like this --> switch(n) Write like this --> switch (n)
不要这样写 --> switch(n) 这样写 --> switch(n)
