ARRAY IMPLEMENTATION OF QUEUE

PROGRAM:

import java.io.*;

import java.lang.*;

class data

{

int i,x;

int a[]=new,int[10];

int rear=-1;

int front=0;

void inqueue() throws IOException

{

DataInput Stream in = new DataInputStream(System.in);

System.out.println("enter the elements");

x=Integer.parseInt(in,readLine());

if(rear>=5)

{

System.out.println("overflow");

}

else

{

rear=rear+1;

a[rear]=x;

}}

void Dequeue() throws IOException

{

if(front>rear)

}

System.out.println("overflow");

else

{front=front+1;

}}void display()throws IOExcetion

{

for (i=front;i<=rear;i++)

{

System.out.println("the elements ;"+a[i]);

}

}

}

class queue

{

public static void main(string args[])throws IOException

{

Data d=new Data();

DatainputStream in=new DataInputStream(System.in);

int i,x,c;

int a[]=new int[10];

do

{

System.out.println("enter the choice");

c=Integer.parseInt(in.readline());

switch(c)

{

case 1:

d.enqueue();

break;

case 2:

d.dequeue();

case 3:

d.display();

break;

}

}

while(c<=3)

}

OUTPUT:

enter your choice:1

enter the elements:30

enter your choice:2

enter the elements:20

enter your choice:1

enter the elements:10

enter your choice:3

elements:

30

20

10

enter your choice:2

10

enter your choice:3

30

20