Library Classes - Java

Converting primitive data type in to an object is known as

• Boxing

• unboxing

Converting objects into primitive datatype is known as parsing

• True

• False

The function that is used to convert a string into integer data type is known as ------

• Integer.parseInt(s)

• Integer.parseInteger(s)

• Integer.parse(s)

__________ is a collection of classes containing different built-in functions.

• JDK

• JCL

• JDE

Some examples of packages available in JCL are( can choose multiple options)

• java.lang

• java.io

• java.net

• java.math

The number of primitive data types available in Java are

• 7

• 8

• 9

• 6

The wrapper class for char data type is

• String

• Char

• character

• Character

We can use valueOf() function to convert string to primitive data type.

• True

• False

We can input a character using Scanner class with the help of he function ------

• scannerobject. charat(0)

• scannerobject.next()char(0)

• scannerobject.next().charAt(0)

• scannerobject.next()charAt(0)

____________ function is used to check if the character entered is letter or a digit.