Core Java - Interview Questions and Answers for 'Import statement' | Search Interview Question

Core Java - Interview Questions and Answers for 'Import statement' - 4 question(s) found - Order By Rating

Q1. Which java package is loaded by default and hence doesn't require an explicit import statement ?

Core Java

Ans. java.lang

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Q2. What is the problem we could face if we be very liberal with importing classes even if we are not using them ? For example

import java.util.*;
import java.io.*;

Core Java

Ans. It makes application little heavy as we are importing classes that aren't required.

It creates class name conflicts as similar name classes might be available across different packages. In case of such conflicts, we will have to specify the package name with the class name at the time of it's usage.

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Q3. What does import java.util.* means in java ?

Core Java

Ans. It means import all the classes and interfaces within java.util package and make them available to use within the current class or interface. This is shorthand wild card annotation for importing all classes within a particular package. This won't import the classes within the sub packages of java.util.

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Q4. Do you know the way to remove unused imports automatically in eclipse ?

Eclipse

Ans. Select the package -> Right Click -> Source -> Organize Imports.

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