class Link
{
public int iData; // data item (key)
public double dData; // data item
public Link next; // next link in list
public Link(int id, double dd) // constructor
{
iData = id; // initialize data
dData = dd; // ('next' is automatically
} // set to null)
public void displayLink() // display ourself
{
System.out.print("{" + iData + ", " + dData + "} ");
}
} // end class Link
class LinkList
{
private Link first; // ref to first link on list
public LinkList() // constructor
{
first = null; // no items on list yet
}
public boolean isEmpty() // true if list is empty
{
return (first==null);
}
public void insertFirst(int id, double dd)
{ // make new link
Link newLink = new Link(id, dd);
newLink.next = first; // newLink --> old first
first = newLink; // first --> newLink
}
public Link deleteFirst() // delete first item
{ // (assumes list not empty)
Link temp = first; // save reference to link
first = first.next; // delete it: first-->old next
return temp; // return deleted link
}
public void displayList()
{
System.out.print("List (first-->last): ");
Link current = first; // start at beginning of list
while(current != null) // until end of list,
{
current.displayLink(); // print data
current = current.next; // move to next link
}
System.out.println("");
}
} // end class LinkList
class LinkListApp
{
public static void main(String[] args)
{
LinkList theList = new LinkList(); // make new list
theList.insertFirst(22, 2.99); // insert four items
theList.insertFirst(44, 4.99);
theList.insertFirst(66, 6.99);
theList.insertFirst(88, 8.99);
theList.displayList(); // display list
while( !theList.isEmpty() ) // until it's empty,
{
Link aLink = theList.deleteFirst(); // delete link
System.out.print("Deleted "); // display it
aLink.displayLink();
System.out.println("");
}
theList.displayList(); // display list
} // end main()
} // end class LinkListApp
// sumber: Data Structures and Algorithm, Sam Publishing
Search Engine Optimizer (SEO)
Sudah hampir satu bulan ini mencoba SEO. Konon katanya bisa menaikkan rating web di www.alexa.com. Awalnya cuma coba-coba saja. Ingin membuktikan. Ternyata ada benarnya. Sebelum memakai jasa SEO, rating web blog ini dulu ada di nomer 5 jutaan. Hari ini saya lihat di Alexa Toolbar sudah mencapai 2.006.310. Luar Biasa! Hanya dalam waktu sekitar satu bulan sudah bisa naik 3.000.000-an peringkat. Memang traffic pengunjung mengalami peningkatan. Dari yang biasanya 20-30an perhari, sekarang menjadi rata-rata di atas 50 pengunjung sehari. Masih sedikit memang, tapi Alhamdulillah. Artikel yang saya post di web blog ini cukup dicari oleh yang membutuhkannya. Semoga bermanfaat :).
Sekarang sedang menunggu-nunggu, kapan bisa tembus 1.000.000-an. Dan syukur-syukur bisa lebih baik lagi. Dukung ya! :)
Sekarang sedang menunggu-nunggu, kapan bisa tembus 1.000.000-an. Dan syukur-syukur bisa lebih baik lagi. Dukung ya! :)
Contoh Program OOP dengan Inheritance Sederhana dalam Bahasa Java
import java.io.*;
import java.util.Scanner;
class makanan
{
public int porsi;
public double harga;
}
class nasi extends makanan
{
public void setharga()
{
harga = 1000;
}
}
class lauk extends makanan
{
public void setharga()
{
harga = 2000;
}
}
class sayur extends makanan
{
public void setharga(double h) //set harga lewat input user
{
harga = h;
}
public double getharga() //mengambil info harga dr class
{
return(harga);
}
}
public class program //utk menjalankan program utama
{
public static void main(String[] args)
{
double h;
sayur s = new sayur(); //create object utk masing2 class
lauk l = new lauk();
nasi n = new nasi();
Scanner sc = new Scanner(System.in);
System.out.print("Harga : ");
h = sc.nextDouble();
s.setharga(h);
System.out.println("Harga sayur :"+s.getharga());
n.harga = 1000; //akses langsung ke atribut
n.porsi = 2;
biaya = n.harga * n.porsi;
System.out.println("Biaya :"+biaya);
//menu program dan manipulasi object yg lain
//bisa diletakkan di sini
}
}
import java.util.Scanner;
class makanan
{
public int porsi;
public double harga;
}
class nasi extends makanan
{
public void setharga()
{
harga = 1000;
}
}
class lauk extends makanan
{
public void setharga()
{
harga = 2000;
}
}
class sayur extends makanan
{
public void setharga(double h) //set harga lewat input user
{
harga = h;
}
public double getharga() //mengambil info harga dr class
{
return(harga);
}
}
public class program //utk menjalankan program utama
{
public static void main(String[] args)
{
double h;
sayur s = new sayur(); //create object utk masing2 class
lauk l = new lauk();
nasi n = new nasi();
Scanner sc = new Scanner(System.in);
System.out.print("Harga : ");
h = sc.nextDouble();
s.setharga(h);
System.out.println("Harga sayur :"+s.getharga());
n.harga = 1000; //akses langsung ke atribut
n.porsi = 2;
biaya = n.harga * n.porsi;
System.out.println("Biaya :"+biaya);
//menu program dan manipulasi object yg lain
//bisa diletakkan di sini
}
}
Contoh Program Queue Array Sederhana dalam Java
import java.io.*;
public class queue_array
{
private int maxsize; //maksimum ukuran queue
private double [] queuearray; //array untuk menyimpan queue
private int front; //indeks elemen terdepan
private int rear; //indeks elemen paling belakang
private int jumlah; //menyimpan jumlah total elemen yang ada
public void inisiasi(int s) //inisialisasi queue
{
maxsize = s;
queuearray = new double [maxsize];
front = rear = jumlah = 0;
}
public void enqueue(double data)
{
if (jumlah==maxsize)
System.out.println("Queue Penuh. "+data+" Tidak Bisa Masuk");
else
{
//System.out.print(rear+" ");
queuearray[rear] = data;
rear = (rear+1)%maxsize;
jumlah++;
System.out.println(data +" Masuk ke Queue");
}
}
public double dequeue()
{
double temp;
if (jumlah==0)
{
System.out.println("Queue Sudah Kosong");
return(-1);
}
else
{
temp = queuearray[front];
front = (front+1)%maxsize;
jumlah--;
System.out.println(temp + " Keluar dari Queue");
return (temp);
}
}
public void view()
{
System.out.print("Isi Queue: ");
if (jumlah > 0 && front < rear) //belum terjadi circular
for(int i=front; i0 && rear <= front) //terjadi circular
{
for(int i=front; i<=maxsize-1; i++) //bagian depan
System.out.print(queuearray[i] + " ");
for(int i=0; i<rear; i++) //bagian belakang
System.out.print(queuearray[i] + " ");
}
System.out.println();
}
public static void main(String[] args)
{
queue_array queue = new queue_array();
queue.inisiasi(3);
queue.enqueue(2);
queue.enqueue(5);
queue.enqueue(3);
queue.enqueue(7);
queue.view();
queue.dequeue();
queue.dequeue();
queue.dequeue();
queue.dequeue();
queue.view();
queue.enqueue(8);
queue.enqueue(9);
queue.enqueue(7);
queue.enqueue(10);
queue.view();
queue.dequeue();
queue.view();
}
}
//Selamat Mencoba ^_^
Download Source Code
public class queue_array
{
private int maxsize; //maksimum ukuran queue
private double [] queuearray; //array untuk menyimpan queue
private int front; //indeks elemen terdepan
private int rear; //indeks elemen paling belakang
private int jumlah; //menyimpan jumlah total elemen yang ada
public void inisiasi(int s) //inisialisasi queue
{
maxsize = s;
queuearray = new double [maxsize];
front = rear = jumlah = 0;
}
public void enqueue(double data)
{
if (jumlah==maxsize)
System.out.println("Queue Penuh. "+data+" Tidak Bisa Masuk");
else
{
//System.out.print(rear+" ");
queuearray[rear] = data;
rear = (rear+1)%maxsize;
jumlah++;
System.out.println(data +" Masuk ke Queue");
}
}
public double dequeue()
{
double temp;
if (jumlah==0)
{
System.out.println("Queue Sudah Kosong");
return(-1);
}
else
{
temp = queuearray[front];
front = (front+1)%maxsize;
jumlah--;
System.out.println(temp + " Keluar dari Queue");
return (temp);
}
}
public void view()
{
System.out.print("Isi Queue: ");
if (jumlah > 0 && front < rear) //belum terjadi circular
for(int i=front; i0 && rear <= front) //terjadi circular
{
for(int i=front; i<=maxsize-1; i++) //bagian depan
System.out.print(queuearray[i] + " ");
for(int i=0; i<rear; i++) //bagian belakang
System.out.print(queuearray[i] + " ");
}
System.out.println();
}
public static void main(String[] args)
{
queue_array queue = new queue_array();
queue.inisiasi(3);
queue.enqueue(2);
queue.enqueue(5);
queue.enqueue(3);
queue.enqueue(7);
queue.view();
queue.dequeue();
queue.dequeue();
queue.dequeue();
queue.dequeue();
queue.view();
queue.enqueue(8);
queue.enqueue(9);
queue.enqueue(7);
queue.enqueue(10);
queue.view();
queue.dequeue();
queue.view();
}
}
//Selamat Mencoba ^_^
Download Source Code
Contoh Program Stack Array Sederhana dalam Java
import java.io.*;
public class stack_array
{
private int maxsize; //penentu batas elemen stack maksimum
private double [] stackarray; //array untuk menyimpan stack
private int top; //indeks array
public void inisiasi(int s) //menentukan ukuran kapasitas stack
{
maxsize = s;
stackarray = new double [maxsize];
top = -1;
}
public void push(double data)
{
if (top>=maxsize-1)
System.out.println("Stack Penuh. "+data+" Tidak Bisa Masuk");
else
{
top++;
stackarray[top] = data;
System.out.println(data +" Masuk ke Stack");
}
}
public double pop()
{
double temp;
if (top>=0)
{
temp = stackarray[top];
System.out.println(temp + " Keluar dari Stack");
top--;
return (temp);
}
else
{
System.out.println("Stack Sudah Kosong");
return(-1);
}
}
public void view()
{
System.out.print("Isi Stack: ");
for(int i=0; i<=top; i++)
System.out.print(stackarray[i] + " ");
System.out.println();
}
public static void main(String[] args)
{
stack_array stack = new stack_array();
stack.inisiasi(3);
stack.push(3);
stack.push(4);
stack.push(2);
stack.view();
stack.push(5);
stack.push(1);
stack.pop();
stack.pop();
stack.view();
stack.pop();
stack.pop();
stack.pop();
stack.push(6);
stack.push(8);
stack.push(7);
stack.push(9);
stack.pop();
stack.view();
}
}
//Selamat mencoba ^_^
public class stack_array
{
private int maxsize; //penentu batas elemen stack maksimum
private double [] stackarray; //array untuk menyimpan stack
private int top; //indeks array
public void inisiasi(int s) //menentukan ukuran kapasitas stack
{
maxsize = s;
stackarray = new double [maxsize];
top = -1;
}
public void push(double data)
{
if (top>=maxsize-1)
System.out.println("Stack Penuh. "+data+" Tidak Bisa Masuk");
else
{
top++;
stackarray[top] = data;
System.out.println(data +" Masuk ke Stack");
}
}
public double pop()
{
double temp;
if (top>=0)
{
temp = stackarray[top];
System.out.println(temp + " Keluar dari Stack");
top--;
return (temp);
}
else
{
System.out.println("Stack Sudah Kosong");
return(-1);
}
}
public void view()
{
System.out.print("Isi Stack: ");
for(int i=0; i<=top; i++)
System.out.print(stackarray[i] + " ");
System.out.println();
}
public static void main(String[] args)
{
stack_array stack = new stack_array();
stack.inisiasi(3);
stack.push(3);
stack.push(4);
stack.push(2);
stack.view();
stack.push(5);
stack.push(1);
stack.pop();
stack.pop();
stack.view();
stack.pop();
stack.pop();
stack.pop();
stack.push(6);
stack.push(8);
stack.push(7);
stack.push(9);
stack.pop();
stack.view();
}
}
//Selamat mencoba ^_^
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