Learn Packages in Java | EasyTechCode
#packages #javatutorial #java #javaprogramming #javabasic #javaforbeginners
Creating Packages and importing packages.
This video about package definition, creating packages and importing packages.
Also about package program compilation, importing package in another java source file and run progam.
Definition for Packages
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The related class are grouped as packages.
For example I/O, Utility, Applet packages.
Packages is container of classes, interfaces and also other packages.
There are several built-in packages.
User can also create than own packages.
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creating packages
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Packages can be created using the keyword package.
Package command should be first statement in a java source file
Any class that created within the file that belongs to the specified package.
package package_name;
We also multilevel packages. ie package contains another package
Package pkg1[.pkg2][.pkg3];
For example java.awt.event;
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Importing Package
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The class that declared inside the package can be used in another package.
Java use the import statement to bring certain classes or entire class into visibility.
For example
import java.io.*;
Here we import all input / output classes.
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