Which of the following are invalid statements.*1 pointint Scanner = 45;int Class = 45;int main = 45;int If = 45;None of the above

To determine which of the provided statements are invalid in Java, we need to evaluate each one based on Java's naming conventions and reserved keywords. Here's a breakdown:

1. Assessing Variable Names:

   • In Java, variable names must follow specific rules. They can include letters, digits, underscores, and dollar signs, but cannot begin with a digit. Additionally, they cannot match reserved keywords (e.g., class, if, main, etc.).

2. Evaluating Each Statement:

   • int Scanner = 45;
     • Valid: "Scanner" is not a reserved keyword.
   • int Class = 45;
     • Invalid: "Class" is a reserved keyword in Java.
   • int main = 45;
     • Valid: "main" is not a reserved keyword in the context of a variable name, even though it's commonly used as a method name.
   • int If = 45;
     • Invalid: "If" is not a reserved keyword, but it's good practice to avoid using similar names as keywords (case does matter in Java).

3. Summary of Findings:

   • Invalid statements: int Class = 45; and, to some extent, int If = 45; (better to avoid).
   • Valid statements: int Scanner = 45; and int main = 45;.

Final Answer

The invalid statements are: int Class = 45; and int If = 45;. The best answer among the options provided is int Class = 45; as it's definitely invalid due to being a reserved keyword.