7. Encapsulation

 

Encapsulation

• It refers to the bundling of data and methods that operate on that data, into a single unit called an object.
• The internal representation and implementation of the data are hidden from external entities, which promotes data integrity and protects it from accidental or unauthorized modifications.
• We can include encapsulation in our code by:
• Keeping instance variables protected (with an access modifier, often private).
• Making public accessor methods, and force calling code to use those methods rather than directly accessing the instance variable.
class Encapsulate {
    private String topperName;
    private String topperRollNo;
    private int passingOutYear;


    public void setTopperName(String topperName) {
        this.topperName = topperName;
    }


    public String getTopperName() {
        return this.topperName;
    }


    public void setTopperRollNo(String topperRollNo) {
        this.topperRollNo = topperRollNo;
    }


    public String getTopperRollNo() {
        return this.topperRollNo;
    }


    public void setPassingOutYear(int passingOutYear) {
        this.passingOutYear = passingOutYear;
    }


    public int getPassingOutYear() {
        return this.passingOutYear;
    }
}


class ShellClass {
    public static void main(String[] args) {
        Encapsulate dbuu2020 = new Encapsulate();
        dbuu2020.setTopperName("Mohammad Arham Khan");
        dbuu2020.setTopperRollNo("20BTCSE0078");
        dbuu2020.setPassingOutYear(2024);
        System.out.println("Gold medalist UTU: " + dbuu2020.getTopperName() + "\nAdmission number: " + dbuu2020.getTopperRollNo() + "\nPassed in the year: " + dbuu2020.getPassingOutYear());
    }
}



• It is not necessary to make the getters and setters for every private variable.