Using a scanner to accept String input and storing in a String Array

Question

Can someone help me please  I have done numerous searches but can t find a solution anywhere   I m a beginner to Java and currently practicing some code while on a break from college    I am trying to make a Phonebook program  At the moment I am trying to add a new contact  below is the code i have but i am not sure how to store the information in an array can someone give me some pointers please       import java util Scanner       public class addContact       public static void main String    args          declare arrays         String    contactName   new String  12           String    contactPhone   new String  12           String    contactAdd1   new String  12           String    contactAdd2   new String  12          inputs     String name           String phone           String add1           String add2              method of taken input     Scanner input   new Scanner System in          while name field is empty display prompt etc      while  name equals                System out println  Enter contacts name          name   input nextLine        name    contactName                while  add1 equals                System out println  Enter contacts addressline1         add1   input nextLine        add1    contactAdd1               while  add2 equals                System out println  Enter contacts addressline2         add2   input nextLine        add2    contactAdd2               while  phone equals                System out println  Enter contact phone number          phone   input nextLine        phone    contactPhone

User · Answer

A cleaner approach would be to create a Person object that contains contactName, contactPhone, etc. Then, use an ArrayList rather then an array to add the new objects. Create a loop that accepts all the fields for each `Person:

while (!done) {
   Person person = new Person();
   String name = input.nextLine();
   person.setContactName(name);
   ...

   myPersonList.add(person);
}

Using the list will remove the need for array bounds checking.

User · Answer

Please correct me if I m wrong    public static void main String   args         Scanner na   new Scanner System in       System out println  Please enter the number of contacts          int num   na nextInt         String   contactName   new String num       String   contactPhone   new String num       String   contactAdd1   new String num       String   contactAdd2   new String num        Scanner input   new Scanner System in        for  int i   0  i  lt  num  i               System out println  Enter contacts name       i 1            contactName i    input nextLine             System out println  Enter contacts addressline1       i 1            contactAdd1 i    input nextLine             System out println  Enter contacts addressline2       i 1            contactAdd2 i    input nextLine             System out println  Enter contact phone number       i 1            contactPhone i    input nextLine                for  int i   0  i  lt  num  i              System out println  Contact Name No      i 1      is   contactName i            System out println  First Contacts Address No      i 1      is   contactAdd1 i            System out println  Second Contacts Address No      i 1      is   contactAdd2 i            System out println  Contact Phone Number No      i 1      is   contactPhone i

User · Answer

go through this code I have made several changes in it    import java util Scanner   public class addContact   public static void main String    args      declare arrays String    contactName   new String  12   String    contactPhone   new String  12   String    contactAdd1   new String  12   String    contactAdd2   new String  12   int i 0  String name    0   String phone    0   String add1    0   String add2    0     method of taken input Scanner input   new Scanner System in      while name field is empty display prompt etc  while  i lt 11        i    System out println  Enter contacts name     i   name   input nextLine    name    contactName i       while  i lt 12        i    System out println  Enter contacts addressline1     add1   input nextLine    add1    contactAdd1 i      while  i lt 12        i    System out println  Enter contacts addressline2     add2   input nextLine    add2    contactAdd2 i      while  i lt 12        i    System out println  Enter contact phone number      phone   input nextLine    phone    contactPhone i

User · Answer

One of the problem with this code is here    name    contactName      This instruction won t insert anything in the array  Instead it will concatenate the current value of the variable name with the string representation of the contactName array   Instead use this   contactName index    name    this instruction will store the variable name in the contactName array at the index index   The second problem you have is that you don t have the variable index   What you can do is a loop with 12 iterations to fill all your arrays   and index will be your iteration variable

User · Answer

There is no use of pointers in java so far  You can create an object from the class and use different classes which are linked with each other and use the functions of every class in main class

User · Answer

Would this work better   import java util Scanner   public class Work    public static void main String   args        System out println  Please enter the following information         String name    0       String num    0       String address    0        int i   0       Scanner input   new Scanner System in          The Arrays     String    contactName   new String  7       String    contactNum   new String  7       String    contactAdd   new String  7          I set these as the Array titles     contactName 0     Name       contactNum 0     Phone Number       contactAdd 0     Address          This asks for the information and builds an Array for each       i -  i resets i back to 0 so the arrays are not 7 14 21      while  i  lt  6            i            System out println  Enter contact name     i           name   input nextLine            contactName i    name             i -  i      while  i  lt  6           i            System out println  Enter contact number     i           num   input nextLine            contactNum i    num             i -  i      while  i  lt  6           i            System out println  Enter contact address     i           num   input nextLine            contactAdd i    num                Now lets print out the Arrays     i -  i      while i  lt  6       i        System out print  i         contactName i                          These are set to print the array on one line so println will skip a line     System out println        i -  i      i -  1       while i  lt  6       i         System out print  i         contactNum i                        System out println        i -  i      i -  1       while i  lt  6           i         System out print  i         contactAdd i                        System out println         System out println  End of program

[java] Using a scanner to accept String input and storing in a String Array

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