What is class in java

In Java, a class is a blueprint or template for creating objects. It defines a set of attributes and methods that are common to all objects of a certain type.

A class contains fields, which represent the attributes or data of an object, and methods, which define the behavior of the object. For example, a Person class might have fields like name, age, and gender, and methods like getName(), getAge(), setAge(), etc.

When you create an object of a class, you are creating an instance of that class. You can then use the methods and fields of the object to perform operations and store data.

Here is an example of a simple class in Java:

public class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

In this example, we have defined a Person class with fields for name and age, and methods for getting and setting those fields. We have also defined a constructor method that sets the initial values for the fields when a new Person object is created.