Hemm... :-) Do you want to know the java program that i made on the first time. I wrote them when I was in the first semester at STMIK Akakom Yogyakarta. They was a simple problem. The problem is save the phone number with an array on java. The program can add the number, edit phone data and remove data from array.
I am so sorry if I wrote the program with Indonesian language. But I will translate to you one by one. So don't worry about it.
Source code java phonebook
package responsialgo; // this is the package nameimport java.util.Scanner; // importing java.util.Scanner to use the object scanner that can read input from a keyboard
class PhoneBook{ // the class name was PhoneBook
// the block of attribut class have nama (name) , nomor (phone number) , jml (counter how many number stored
public String nama[]=new String [50];
public String nomor[]=new String [50];
public int jml=0;
//end of block
//this block is method for adding number into array data
public void tambahNomor(){
Scanner masuk=new Scanner(System.in);
if(jml<50){ // if array number is least than 50 then we can add the phone number
//this block read input from keyboard (Name and Phone Number)
System.out.println("Silahkan masukkan :");
System.out.print("Nama =");
nama[jml]=masuk.nextLine();
System.out.print("Nomor =");
nomor[jml]=masuk.nextLine();
//increment the counter
jml++;
}else{ //if number of array is not least then 50 then show the message that Phonebook was full
System.out.println("Phone book sudah penuh!!!");
}
}
//end of block
//this block is method for show phonebook list . I use looping with For Statement to get array elemen
public void tampilDaftar(){
System.out.println("No. Nama ( Nomor )");
for(int i=0;i<jml;i++){
System.out.println( (i+1) + " " + nama[i] + " (" + nomor[i] + ")");
}
}
//end of block
//this block is method for removing number from array data
public void hapusDaftar(){
Scanner masuk=new Scanner(System.in);
//input index of data which will be removed
System.out.print("Masukkan indeks phonebook yang akan dihapus = ");
int indeks=masuk.nextInt()-1;
//searching for data which will deleted with comparing index of data, after that change index of data sliding data before that.
if(jml>0){
for(int i=indeks;i<jml;i++){
nama[i]=nama[i+1];
nomor[i]=nomor[i+1];
}
nama[jml-1]="";
nomor[jml-1]="";
jml--;
}else{
System.out.println("Tidak ada data yang dihapus!!!");
}
}
//end of block
//this block is method for updating number from array data
public void gantiNomor(){
Scanner masuk=new Scanner(System.in);
//input index of data which will be updated
System.out.print("Masukkan indeks phonebook yang akan diubah = ");
int indeks=masuk.nextInt()-1;
//replace data with a new phone number
System.out.print("Masukkan nomor baru = ");
nomor[indeks]=masuk.next();
}
}
//end of block
//The main class to run program
public class DaftarPhoneBook {
public static void main(String[] args) {
int pil=0;
//Create an object HP from class PhoneBook
PhoneBook HP=new PhoneBook();
Scanner masuk=new Scanner(System.in);
System.out.println("PHONEBOOK");
System.out.println("by Alir Retno");
System.out.println("====================");
//Creating a menu to acces program
System.out.println("Menu :");
System.out.println("1. Tambah Nomor"); //1. Add Number
System.out.println("2. Tampilkan Daftar"); //2. Show List
System.out.println("3. Ganti Nomor"); //3. Update Number
System.out.println("4. Hapus Nomor"); //4. Delete Number
System.out.println("5. Keluar"); //5. Exit
//This is a block try & catch , for handling an exception if user give an error input
try {
//While user does'nt choose to exit do this looping
do {
System.out.print("Pilih :");
pil=masuk.nextInt(); //input the choice
if(pil==1){
HP.tambahNomor();//if user chose 1, please add number
}else if(pil==2){
HP.tampilDaftar(); //if user chose 2, please show the list
}else if(pil==3){
HP.gantiNomor(); //if user chose 3, please update number
}else if(pil==4){
HP.hapusDaftar(); //if user chose 4, please delete number
}
}while(pil<5);
System.out.println("Anda keluar dari program.");
System.out.println("Terima Kasih");
}catch(Exception err){ //handling if the input is not valid
System.out.println("Masukan error!!!");
}
}
}
Do you think it's so simple program? . Yeah... If you want to solve problem, familiarize to keep it simple appropriate motto "Keep It Simple and Stupidest" . Do something with a simple and find begin a stupidest method that it's works. After that you can repair the method gradually.
If you want to get my source code please open my Free Download Pages.
Oke guys, I think I just a little man, so if you have any critics or suggestion for me. Please comment this article.
