Implement Queue In Java

Que main class

import java.io.*;

class que{
	public static void main(String args[]) throws IOException{
		// create an object to take input from user
		BufferedReader br= new BufferedReader (new InputStreamReader(System.in));
		// create a QueBlueprint object
		QueBlueprint Quer = new QueBlueprint();
		//take choices from user
		int c=0;
		
		do{
		System.out.println("1 : to print elements in queue");	
		System.out.println("2 : Current Status");
		System.out.println("3 : To Add Element (Push)");
		System.out.println("4 : To Remove Element (Pop)");
		System.out.println("5 : Exit");
		System.out.println("\n Enter Your Choice");
		c=Integer.parseInt(br.readLine());
		if(c==1){
		Quer.printQueue();
		}
		if(c==2){
		Quer.currentStatus();
		}
		if(c==3){
		Quer.push();
		}
		if(c==4){
		Quer.pop();
		}
		}
		while(c!=5);
	
	}
}

Queue main logic

import java.io.*;

class QueBlueprint{

// declare some global variables
int currentPosition= -1;
int size= 20;
int arr[]= new int[size];

		BufferedReader br = new BufferedReader (new InputStreamReader(System.in));
		//method to check if queue is full
		protected boolean full(){
			if(currentPosition==(size-1)){
				System.out.println("Queue is Full");
				return true;
			}
			else{
				
				return false;
			}
		}
		
		// method to check if queue is empty
		protected boolean empty(){
			if(currentPosition != -1){
				return false;
			}
			else{
				System.out.println("Queue is Empty");
				return true;
			}
		}
		
		// method to print the queue
		void printQueue(){
			if(!full() && !empty()){
			for(int i=0;i0){
				for(int i=0;i