Thread: Address Book Help

import java.io.*;
import java.text.DecimalFormat;
 
public class AddressBook{
public AddressBook(){
}
DecimalFormat al = new DecimalFormat("#.##");
    private String name="";
    private String address="";
    private int telephone;
    private String email;
    private String att;
 
 
     public static void main( String[] args ){
     DecimalFormat al = new DecimalFormat("#.##");
 
        AddressBook aBook = new AddressBook();
        AddressBook bBook = new AddressBook();
        AddressBook cBook = new AddressBook();
 
        aBook.setName("Boy Katay");
        bBook.setName("Kris Manginum");
        cBook.setName("Ronald Spades");
 
        aBook.setAddress("123 SlaughterHouse");
           bBook.setAddress("26 Assumption Road");
        cBook.setAddress("89 Casino Avenue");
 
        aBook.setTelephone(4246512);
        bBook.setTelephone(4421231);
        cBook.setTelephone(6201130);
 
        aBook.setEmail("Katay@yahoo.com");
        bBook.setEmail("Arak@gmail.com");
        cBook.setEmail("Pusoy@hotmail.com");
 
        aBook.setAtt("Student");
        bBook.setAtt("Student");
        cBook.setAtt("Student");
 
 
 
 
        System.out.println(
        "Attributes/Properties    :"+aBook.getAtt()+
        "\nStudent Name        :"+aBook.getName()+
        "\nnAddress        :"+aBook.getAddress()+
        "\nTelephone        :"+aBook.getTelephone()+
        "\nEmail            :"+aBook.getEmail()+
 
        "\n\nAttributes/Properties    :"+bBook.getAtt()+
        "\nStudent Name        :"+bBook.getName()+
        "\nAddress            :"+bBook.getAddress()+
        "\nTelephone        :"+bBook.getTelephone()+
        "\nEmail            :"+bBook.getEmail()+
 
        "\n\nAttributes/Properties    :"+cBook.getAtt()+
        "\nStudent Name        :"+cBook.getName()+
        "\nAddress            :"+cBook.getAddress()+
        "\nTelephone        :"+cBook.getTelephone()+
        "\nEmail            :"+cBook.getEmail());
 
   }
 
 
    public String getName(){
       return name;      
    }
    public void setName( String name ){
       this.name = name;
    } 
    public String getAddress(){
        return address;
    }
    public void setAddress( String address ){
       this.address = address;
    }  
     public int getTelephone(){
       return telephone;      
    }
    public void setTelephone( int telephone ){
       this.telephone = telephone;
    }  
    public String getEmail(){
       return email;      
    }
    public void setEmail( String email){
       this.email= email;
    }
    public String getAtt(){
       return att;      
    }  
    public void setAtt( String att){
       this.att= att;
    }
 
}

How can I make this code so that I can create a class address book that can contain 50 entries of AddressBookEntry objects (using the code above). And it should provide the following methods for the address book.

1. Add entry
2. Delete entry
3. View all entries
4. Update an entry

How to Use Arrays

import java.io.*;
public class Test {
 
   public String name;
   public String address;
   public String number;
   public String email;
 
   //Accessor methods
   public String getName(){
       return name;
   }
       public String getAddress(){
               return address;
   }
       public String getNumber(){
               return number;
   }
       public String getEmail(){
               return email;
   }
   //Mutator Methods
       public void setName(String name){
               this.name = name;
   }
       public void setAddress(String address){
               this.address = address;
   }
       public void setNumber(String number){
               this.number = number;
   }
       public void setEmail(String email){
               this.email = email;
   }
   public static void main(String[] akoceekwan)throws IOException{
       BufferedReader d = new BufferedReader(new InputStreamReader(System.in));
                      String[][] name = new String[50][4];
                String[][] address = new String[50][4];
                int[][] number = new int[50][4];
                String[][] email = new String[50][4];
                  char a;
               int asa;
               Test ax = new Test();
               do{
               System.out.println("[1]Add Entry"+
                      "\n[2]Delete entry"+
                      "\n[3]View all entries"+
                      "\n[4]Update an entry"+
                      "\n[5]Exit"+
                      "\nChoose an Option:\t");
       asa = Integer.parseInt(d.readLine());
 
 
       if(asa == 1){
 
           System.out.println("Enter Name: ");
               String s = d.readLine();
           System.out.println("Enter Address: ");
               String u = d.readLine();
           System.out.println("Enter Telephone Number: ");
               String g = d.readLine();
           System.out.println("Enter Email Address: ");
               String o = d.readLine();
 
           ax.setName(s);
           ax.setAddress(u);
           ax.setNumber(g);
           ax.setEmail(o);
       }
       else if(asa == 3){
           System.out.println("Name: "+ax.getName()+
                              "\nAddress: "+ax.getAddress()+
                              "\nNumber: "+ax.getNumber()+
                              "\nEmail: "+ax.getEmail());
       }
 
       }while(asa != 5);
               System.out.println("Goodbye!");
 
       }
}

I have this so far... how can I make it contain the 50 entries? and the option "Delete entry"

(java newbie self learning, i need more explanation on the subject.. thanks!)

Why are you using 2 dimensional arrays in your main method? I fail to see the reasoning.

Originally Posted by DavidFongs

Why are you using 2 dimensional arrays in your main method? I fail to see the reasoning.

so do i have to use 1 dimensional array? and did i put it in the right place?