Complex Java Object to Json

Question

I have a java class like :

public class Sclass {
    private Student student;
    private Teacher teacher;

    public Student getStudent() {
        return student;
    }
    public void setStudent(Student student) {
        this.student = student;
    }
    public Teacher getTeacher() {
        return teacher;
    }
    public void setTeacher(Teacher teacher) {
        this.teacher = teacher;
    }
}

public class Teacher {
    private String name;

    public String getName() {
        return name;
    }

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

public class Student {
    private String name;
    private int age;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
}

I want to use Sclass in a rest service and thus want a json for the same, please assist.

Answer 1

Example using gson:

Student student = new Student();
student.setName("Student 1");
student.setAge(18);

Teacher teacher = new Teacher();
teacher.setName("Teacher 1");

Sclass sclass = new Sclass();
sclass.setStudent(student);
sclass.setTeacher(teacher);

Gson gson = new Gson();
String json = gson.toJson(sclass);

System.out.println(json);

Output:

{"student":{"name":"Student 1","age":18},"teacher":{"name":"Teacher 1"}}