dependencies {
    compile 'cn.ikaze.KObjectSave:library:1.0.0'
}

public class Student {
    int no = 1; //по умолчанию 1
    String name = "gojuukaze";//по умолчанию gojuukaze
    Date birthday = new Date(); //по умолчанию текущая дата
    List<String> subjects;
    
    public String toString() {
        Format format = new SimpleDateFormat("yyyy-MM-dd");
        String birthdayString = format.format(birthday);
        return "No." + no + ", name: " + name + ", birthday: " + birthdayString + ", subjects: " + subjects;
    }
}

KObjectSave kSave = new KObjectSave(this, Student.class);
Student st = (Student) kSave.getObj();

st.no=23;
st.name="A";
st.subjects=new ArrayList<String>(){{add("math");add("physics");}};

try {
  kSave.save(st);
} catch (IOException | IllegalAccessException e) {
  e.printStackTrace();
}

Student tempSt = (Student) new KObjectSave(this, Student.class).getObj();
lod.d("KObjectSave",""+tempSt);

                            Apache License
                       Version 2.0, January 2004
                    http://www.apache.org/licenses/