Giving me error while making my class paracelable

[chnouman]

public class SubjectCard {

String  subject_name, subject_image, section, grade, no_of_students;
ArrayList<HashMap<String ,String >> dps;
ArrayList<HashMap<String ,String > > class_performance;
ArrayList<HashMap<String ,String > > attendence_of_five_days;



public SubjectCard() {
}

public String getSubject_name() {
    return subject_name;
}

public void setSubject_name(String subject_name) {
    this.subject_name = subject_name;
}

public String getSubject_image() {
    return subject_image;
}

public void setSubject_image(String subject_image) {
    this.subject_image = subject_image;
}

public String getSection() {
    return section;
}

public void setSection(String section) {
    this.section = section;
}

public String getGrade() {
    return grade;
}

public void setGrade(String grade) {
    this.grade = grade;
}

public String getNo_of_students() {
    return no_of_students;
}

public void setNo_of_students(String no_of_students) {
    this.no_of_students = no_of_students;
}


public ArrayList<HashMap<String, String>> getDps() {
    return dps;
}

public void setDps(ArrayList<HashMap<String, String>> dps) {
    this.dps = dps;
}

public ArrayList<HashMap<String, String>> getClass_performance() {
    return class_performance;
}

public void setClass_performance(ArrayList<HashMap<String, String>> class_performance) {
    this.class_performance = class_performance;
}

public ArrayList<HashMap<String, String>> getAttendence_of_five_days() {
    return attendence_of_five_days;
}

public void setAttendence_of_five_days(ArrayList<HashMap<String, String>> attendence_of_five_days) {
    this.attendence_of_five_days = attendence_of_five_days;
}

@Override
public String toString() {
    return "SubjectCard{" +
            "subject_name='" + subject_name + '\'' +
            ", subject_image='" + subject_image + '\'' +
            ", section='" + section + '\'' +
            ", grade='" + grade + '\'' +
            ", no_of_students='" + no_of_students + '\'' +
            ", dps=" + dps +
            ", class_performance=" + class_performance +
            ", attendence_of_five_days=" + attendence_of_five_days +
            '}';
}

}

[chnouman]

this is my class