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how to create java package and use it

java creating simple package containing class and display method in another program accessing that package using import keyword video tutorial





A package is a collection of related classes. it helps improve re-usability.

It helps Organize your classes into a folder structure and make it easy to locate and use them.
Syntax used to create package is 
package;

 Step 1) Consider the following code,

·       Save as demo.java
·       Compile using javac demo.java
·       Re comple
·       javac -d . demo.java
·       Packge name folder created
·       Java p1.c1 fully qulified name is used to run mehtod 


package p1;

class c1{
public void m1()
{
System.out.println("pakge class ");
}

public static void main(String s[])
{
c1 obj=new c1();
obj.m1();
}

}



lets take example in above video follow steps in video copy below code 


Save as 
Emp.java

package prakash;
public class Emp
{
 public void display()
 {
  System.out.println("hi its method display of pkg Prakash");
 }

}

1) Sve program in C Drive
2)Comple using Javac Emp.java
3) Re comple using  Javac -d . Emp.java
after 2nd compilation folder prakash created on D drive 


Creat another program Save and Comple using
Javac PkgDemo.java 
Run using java PkgDemo.



save as 
PkgDemo.java 

import prakash.*;

class PkgDemo
{
public static void main(String s[] )
{
prakash.Emp obj=new prakash.Emp();
obj.display();
}


}


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