Wrapper Class

Wrapper classes are found in _____ package

• java.lang

• java.util

• java.io

• java.net

The data type wrapper classes are in……….package

• java.lang

• java.io

• java.util

• java.applet

Which of these is a wrapper for data type int?

• Integer

• Long

• Byte

• Double

Which of these is a super class of wrappers Long, Character & Integer?

• Long

• Digits

• Float

• Number

Which of these is a wrapper for simple data type char?

• Float

• Character

• String

• Integer

Which of the following is method of wrapper Integer for converting the value of an object into int?

• bytevalue()

• int intValue();

• Bytevalue()

• Byte Bytevalue()

Which of these methods is used to obtain value of invoking object as a long?

• long value()

• long longValue()

• Long longvalue()

• Long Longvalue()

Consider the following two statements

int x = 25;

Integer y = new Integer(33);

What is the difference between these two statements?

• Primitive data types

• primitive data type and an object of a wrapper class

• Wrapper class

• None of the above

Where does the primitive data type values be stored?

• Heap Memory

• Stack Memory

• Both A & B

• None of the above

Converts string "24" into integer and stores it in integer variable n

• int n=Integer.parseInt("24");

• int n=Integer.ParseInt("24");

• Integer.parseInt("24");

• int n=integer.parseInt("24");