What keyword is used to import Java classes into another class?

• A. use
• B. include
• C. import
• D. require

Answer: (C)

The keyword used to import Java classes into another class is "import." This keyword facilitates access to classes and interfaces from other packages, allowing developers to use them without needing to specify the full package name every time.

When you use the import statement at the beginning of your Java file, you're telling the Java compiler that you want to utilize classes from other packages. For example, if you want to use the ArrayList class from the java.util package, you would write import java.util.ArrayList; at the top of your Java file. This action makes the ArrayList class available for use within your class without further qualification.

The use of "import" enhances code readability and maintainability, as it reduces the verbosity of the code and makes it clear which external classes are being utilized. This stands in contrast to the other provided options, which do not serve as keywords in Java for importing classes.