structure Struct in Java 20

Unfortunately, Java does not have a struct keyword like in some other programming languages. However, you can achieve similar functionality in different ways.

One way is to use classes in Java to create a data structure that stores related data members, just like in struct in other programming languages. Here's an example:

public class Person {
   String name;
   int age;
   double height;
}
//Creating an instance of the Person class

Person john = new Person();

john.name = "John";

john.age = 30;

john.height = 6.1;

This creates a Person class with three data members name, age, and height, and then instantiates john as a new Person object and sets the three data members.

Another way to achieve similar functionality is to use a HashMap or Hashtable to store related data members. Here's an example:

import java.util.HashMap;
public class Employee {

   HashMap attributes;

   

   public Employee(String name, int age, int id) {

      attributes = new HashMap();

      attributes.put("name", name);

      attributes.put("age", age);

      attributes.put("id", id);

   }

}
//Creating an instance of the Employee class

Employee bob = new Employee("Bob", 28, 123);

In this example, the Employee class has a HashMap called attributes that stores related data members, and the Employee constructor sets the values in the HashMap. The advantage of using a HashMap is that it can store data members of different data types.

In summary, Java does not have a struct keyword, but you can use classes or HashMaps to achieve similar functionality.