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;
|
· 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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