Spring - getBean and Setter Injection

We have a Student class -

public class Student {
    private int id;
    private String name;

    public Student() {}
    
    public Student(int id) {
        this.id = id;
    }

    public Student(String name) {
        this.name = name;
    }

    public Student(int id, String name) {
        this.id = id;
        this.name = name;
    }

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void display() {
        System.out.println("Name is: " + name + ", and ID is: " + id);
    }

}

Without Spring, we create a Student instance like -

Student student = new Student();
student.setId(0);
student.setName("Tom")

With Spring, Spring container creates instance, and we use getBean to get the instance.

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
Student student = (Student) context.getBean("student");

spring.xml -

More explanation about Application Context container can be found at spring_applicationcontext_container.