Not Printing the Content of Object:SOme Garbage Value on Screen

Question

i have made one program of Vehicle class which adds and prints the Details of Vehicles in the ArrayList but it always showa the Garbage Value in return.
import java.util.*;
import java.awt.*;
import java.lang.*;
import java.io.*;
public class Vehicle
     private int reg_no;
     private String model_name;
     private int model_no;
     private int yr_manufacture;
     private String veh_type;
     private int price;
     private int weight;
     private String veh_status;
     public ArrayList vehicles;
     static BufferedReader keyboard = new BufferedReader (new InputStreamReader (System.in));
     public Vehicle()
          //super();          
          vehicles=new ArrayList(10);
     public Vehicle(int regno,String mo_name,int mo_no,int year_manu,String type_veh,int cost,int weight,String status)
     this.reg_no=regno;
     this.model_name=mo_name;
     this.model_no=mo_no;
     this.yr_manufacture=year_manu;      
     this.veh_type=type_veh;
     this.price=cost;
     this.weight=weight;
     this.veh_status=status;
     public void addVehicle() throws IOException
          int regno;
          String mo_name;
          int mo_no;
          int year_manu;
          String type_veh;
          int weight=0;
          int no_person;
          int cargo;
          int cost;
          String status;
          String confirm;
          int countvehicle=0;
          //start of do-while loop
          do {
               System.out.print("Input the Vehicle Registration Number(Integer):");
               regno=Integer.parseInt(keyboard.readLine().trim());
               System.out.print("Input the Vehicle Make(String)eg. Mercedes,Ferrari,BMW etc: ");
               mo_name=keyboard.readLine();
               System.out.print("Input the Vehicle Model(Integer): ");
               mo_no=Integer.parseInt(keyboard.readLine().trim());
               System.out.print("Input the Vehicle Manufactured Year(Integer): ");
               year_manu=Integer.parseInt(keyboard.readLine().trim());
               System.out.print("Input the Vehicle Type:(CAR/BUS/TRUCK)");
               type_veh=keyboard.readLine();
               System.out.print("Where do u want this Vehicle to be Loaded:(Type F or I)?");
               status =keyboard.readLine();
                    if(countvehicle>6 && status.equals("I"))
                    System.out.println("Sorry.........Ferry is Overloaded your Vehicle will be Loacally on the Island");
                    status="Island";
                    System.out.println("Vehicle in Island");
                    else
                         System.out.println("Vehicle loaded on to Ferry");
                         status="Ferry";
               //decide the weight Factor for the Vehicle
               if(type_veh.equals("CAR"))
                    weight=1500;                
               else if(type_veh.equals("BUS"))      
                    System.out.print("Input the boarding No of Person in Bus: ");
                    no_person=Integer.parseInt(keyboard.readLine().trim());
                    weight=(10000+(no_person*75));// Assuming the weight of one Person is 75kg.
               else if(type_veh.equals("TRUCK"))
                    System.out.print("Input the Truck Cargo Load: ");
                    cargo=Integer.parseInt(keyboard.readLine().trim());
                    weight=(4500+cargo);                
               System.out.print("Input the Vehicle Price: ");
               cost=Integer.parseInt(keyboard.readLine().trim());
               Vehicle regVehicle= new Vehicle (regno,mo_name,mo_no,year_manu,type_veh,cost,weight,status);
               vehicles.add(regVehicle);//Add to the Vector
               regVehicle.printall();
               //Saving the Added Object in File
               /*try
                         FileOutputStream f_out = new FileOutputStream("Added.txt");                    
                         ObjectOutputStream obj_out = new ObjectOutputStream(f_out);
                         obj_out.writeObject(vehicles.add(regVehicle));
                    catch (FileNotFoundException e)
                         System.err.println("Error:"+ e.getMessage());
                    catch (IOException e)
                         System.err.println("Error:"+ e.getMessage());
               countvehicle++;
               System.out.print ("Add a new vehicle (y or n)? ");
               System.out.flush();      
     confirm= keyboard.readLine();
               } while (confirm.equals("y")); //end of do while loop
     public Vehicle getVehicle(int index) throws IOException
          return (Vehicle)vehicles.get(index);
     public int getRegNo() throws IOException
          return reg_no;               
     public Vehicle lookUpVehicle (int accnos)throws IOException
//start of for loop
          for(int i=0;i<vehicles.size();i++)
          //checks if the information entered are correct using an if statement
          if((((Vehicle)vehicles.get(i)).getRegNo()) == accnos)
               return ((Vehicle)vehicles.get(i));
return null;
     public void printDetails()throws IOException
          System.out.println("--------Vehicle Details------------ ");
     for(int i=0;i<vehicles.size();i++)
          System.out.println(" " + getVehicle(i));           
     //System.out.println("\n\n");
     //return ((Vehicle)elements());*/
     /*Iterator it = vehicles.iterator();
          while (it.hasNext())
               System.out.println(it.next());
     public void printall()
          System.out.println(reg_no);
          System.out.println(model_name);
          System.out.println(model_no);
          System.out.println(weight);
}

Answer 1

sohamdave wrote:
what toString will contain in them.i didn't get you there.it is the whole data type-casted to String or only object type-casted to StringSimply return a String representation of the Vehicle object; frequently the String contains the member variable values, e.g.
public String toString() {
   return model_name+" "+veh_type;
}The List toString() method itself invokes your method when the List itself needs to be printed.
kind regards,
Jos