Primitive data types are built in data types which are a part of the wrapper classes. These wrapper classes are encapsulated in the java.lang package. Non primitive datatypes like Scanner class are a part of the utility package for which an object needs to be created.

(a) To which package the Character and Boolean classes belong?

(b) Write the statement to access the Scanner class in the program.

What is the method to check whether a character is a letter or digit?

1. isDigit(char)
2. isLetterOrDigit()
3. isLetterOrDigit(char)
4. isLETTERorDIGIT(char)

The method to convert a lowercase character to uppercase is:

1. String.toUpperCase( )
2. Character.isUppercase( char )
3. Character.toUpperCase( char )
4. toUpperCase ( )