Today we are going to perform the practical of access modifier which we learned in previous day blog

still let me recall all the modifiers for you

• default
• public
• private
• protected

Default

class tut{
	public static void callme()
	{
		System.out.println("Default Access-Modifier");
	}
}

public class first {

	public static void main(String args[])
	{

		tut.callme();
		
	}

}

class “tut” will be accessible in this package only , let’s create a new class with package name “tuts”

package tuts;

import com.yash.tut;

public class test {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

}

when we try to import “tut” class from package com.yash it gives us an error: the type com.yash.tut is not visible

Public this type of class members are accessible to the outside-world , it means we can access them inside the same package as well as outside the package

package com.yash;

public class first {

	public static void main(String args[])
	{

		System.out.println("This is a public class");
		
	}

}

let’s creare a new class with package name “tuts” and then import the public class “first” in it .

package tuts;

import com.yash.first;

public class test {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		first.main(args);

	}

}

this program will run successfully .

Private These members are not even accessible in same package and not even in child class

package com.yash;


class tut{
	private static void callme()
	{
		System.out.println("This is a private class method");
	}
}

class tuts extends tut{
	void func() {
		tut.callme();
	}
}

public class first {

	public static void main(String args[])
	{

		System.out.println("This is a public class");
		tut.callme();
	}

}

Protected These members are accessible in same package as well as in a child class.

package com.yash;


class tut{
	protected static void callme()
	{
		System.out.println("This is a protected class method");
	}
}

class tester extends tut{
	static void func()
	{
	tester.callme();
	}
}
public class first {

	public static void main(String args[])
	{

		System.out.println("This is a public class");
		tut.callme();
		tester.func();
	}

}

now what if the class is public , can we access the protected member outside the package directly by importing it ? answer is NO but what if the class is public and member is protected , can we access it outside the package using child class ? answer is YES , let’s see how.

//first.java
package com.yash;


public class first {
	
	protected static void disp() {
		System.out.println("Protected method in a public class");
	}

	public static void main(String args[])
	{

		System.out.println("This is a public class");
		first.disp();
	}

}

//test.java
package tuts;

import com.yash.first;

public class test extends first{

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		first.disp();
		

	}

}

and if you run test.java it will execute succesfully , because a public class is accessible outside the package and test class becomes the child class and child class can access protected members , In this way we can access a protected member outside the package