Final answer:
From the list, the classes are 'String' and 'Scanner'. 'int', 'double', and 'char' are primitive data types, while 'myWord' could be a variable, 'Hello' is a String literal, and '7.5' represents a double value.
Step-by-step explanation:
The question asks to select all the classes from a given list. In the context of programming, particularly Java, a class is a blueprint from which individual objects are created. In Java, classes come with a capitalized first letter by convention. From the list provided, the classes are String and Scanner. To clarify further:
- int and double are primitive data types, not classes.
- char is also a primitive data type for characters.
- " Hello " is a String literal, not a class name itself.
- myWord seems like a variable name, which could potentially reference a class but isn't one by itself without more context.
- 7.5 is a literal representing a double value.
Therefore, the classes from the list are String and Scanner.