Question

How can i create a package?

Answer 1

A java package is a group of similar types of classes, interfaces and sub-packages.

Package in java can be categorized in two form, built-in package and user-defined package.

To Compile: javac -d . Simple.java

To Run: java mypack.Simple

To run this program from e:\source directory, you need to set classpath of the directory where the class file resides.

 

There are three ways to access the package from outside the package.

1. import package.*;
2. import package.classname;
3. fully qualified name.

**If you import a package, subpackages will not be imported.

Comments

I believe the question is not about basic java but how to achieve this from onlinegdb. Because if we declare the package we are getting below error.

<CODE>
package com.wiley.test;
/**
 * Complete the getSum method in Parent class.
 * Then do the requred modifications to Main.java file classes
 * to access Parent class getSum method via inheritance.
 *
 * */

public class Main
{

  public static void main (String[]args)
  {
    int[] input = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
    System.out.println ("Sum of given array is " +
            new Child ().getSum (input));

  }
}

class Child
{

  public int getSum (int[]input)
  {
    return 0;
  }

}

<Error after run the code>
Error: Could not find or load main class Main.

<Note>
Code runs perfectly if the package declaration is removed.