Import Section in JAVA Programming Format

Import Section:

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The main intention of "import" statement is to make available classes and interfaces of a particular package into the present JAVA file.

Syntax:

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1. import package_name.*;
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It able to import all classes and interfaces from the specified package.
EX:
import java.io.*;

2. import pacakge_name.member_name;
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It able to import only the specified member from the specified package.
EX:
import java.io.BufferedReader;

Note: In JAVA file, we are able to provide atmost one package declaration statement but we are abel to provide
more than one import statement.
EX: File Name: abc.java
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package p1; ---------> valid
package p2; ---------> invalid ( It should be first statement)
import java.io.*; ---> valid
import java.util.*; -> valid
import java.sql.*; --> valid
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Q. Is it possible to use classes and interfaces of a particular package without importing that package?
Ans. Yes, it is possible to use classes and interfaces of a particular package in the present java file without importing that package, but we have to use fully qualified names of the classes and interfaces.

Note: Specifying class name and interface name along with package name is called as Fully qualified Names.
EX:
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java.io.BufferedReader;
java.util.ArrayList;

Note: In JAVA application, always import statements are suggestible instead a fully qualified names.
EX:
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 # A JAVA program with import statement.
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import java.io.*;
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BufferedReader br = new BufferedReader( new InputstreamReader(System.in));


 # A JAVA program without import statement.
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java.io.BufferedReader br = new java.io.BufferedReader(new java.io.InputStreamReader(Sytem.in));

Note: Here java.io.BufferReader is fully qualified name.