adt - How to create a complex type in android -

is there sample or tutorial teach how create complex type in android, likes message<double,double,string,int>?

why aren't generating own class? please know java little more better, , have @ java book.

public class message {  private double _double1, double2; private string _message; private int _number;    public message(double _double1, double double2, string _message, int _number) {     super();     this._double1 = _double1;     this.double2 = double2;     this._message = _message;     this._number = _number; } public double get_double1() {     return _double1; } public void set_double1(double _double1) {     this._double1 = _double1; } public double getdouble2() {     return double2; } public void setdouble2(double double2) {     this.double2 = double2; } public string get_message() {     return _message; } public void set_message(string _message) {     this._message = _message; } public int get_number() {     return _number; } public void set_number(int _number) {     this._number = _number; }   }