Beans in Groovy

In Java, a bean is a class that follows below conventions.

a.   All properties must be private, operations on properties are exposed via getter and setter method.

b.    Class must have a public no-argument constructor

c.    Class must implement Serializable interface.

In Java, we can define an Employee class like below.

public class Employee {
	private int id;
	private String firstName;
	private String lastName;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getFirstName() {
		return firstName;
	}

	public void setFirstName(String firstName) {
		this.firstName = firstName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

}

We can rewrite the Employee class like below in Groovy.

class Employee {
	int id
	String firstName
	String lastName
}

Groovy provide setter and getter methods by default.

Employee emp1 =  new Employee();

emp1.setId(1);

emp1.setFirstName("Krishna");

emp1.setLastName("Gurram");

Find the below working application.

HelloWorld.groovy

class Employee {
	int id
	String firstName
	String lastName
}

Employee emp1 =  new Employee();
emp1.setId(1);
emp1.setFirstName("Krishna");
emp1.setLastName("Gurram");

println emp1.getId() + "," + emp1.getFirstName() + "," + emp1.getLastName()

Output

1,Krishna,Gurram

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