Queue poll () Metode ing Jawa karo Conto

Apa iku Antrian?

Kaya jeneng kasebut, Antrian minangka struktur data umum ing Jawa miturut urutan sisipan First In First Out (FIFO) . Sampeyan bisa gampang mbayangno minangka antrian ing toko. Cepet sampeyan mlebu, luwih cepet sampeyan lunga. Tegese unsur sing ditambahake ing antrian sadurunge uga bakal lunga. Unsur pisanan (ngarep) antrian uga disebut sirah . Fig 1.0: Antrian prasaja ing Jawa

Apa poll() metode Antrian?

Jajak pendapat () cara ngijini sampeyan kanggo njupuk lan mbusak paling ndhuwur unsur (kepala) antrian a. Ing conto kita, nalika sampeyan nelpon poll () ing antrian ndhuwur, sampeyan bakal nampa '1' minangka asil. Lan mung ana 4 unsur sing isih ana ing antrian. Fig 1.1: Sawise nggunakake poll () cara ing antrian

poll() ing Jawa

Tuladha 1

Deleng ing conto prasaja saka nelpon poll () fungsi ing antrian ditampilake ing tokoh 1.0.

import java.util.LinkedList;
import java.util.Queue;

public class QueuePollMethod {

	public static void main(String[] args) {

	  // create a queue of die rolls 
        Queue dieRoll   = new LinkedList(); 
  
        // Add 6 integers one by one
        dieRoll.add(1); 
        dieRoll.add(2); 
        dieRoll.add(3); 
        dieRoll.add(4); 
        dieRoll.add(5); 
        dieRoll.add(6); 
  
        // print the original queue 
        System.out.println("Queue:\t" + dieRoll + "\n"); 
  
        // after calling poll()
        System.out.println("poll() returned : " + dieRoll.poll()); 
        System.out.println("Queue Updated!\t" + dieRoll + "\n"); 

        // after calling poll()
        System.out.println("poll() returned : " + dieRoll.poll()); 
        System.out.println("Queue Updated!\t" + dieRoll + "\n"); 
        
        // after calling poll()
        System.out.println("poll() returned : " + dieRoll.poll()); 
        System.out.println("Queue Updated!\t" + dieRoll + "\n");        
	}
}

Output Wigati dimangerteni, carane sawise saben jajak pendapat () ukuran telpon antrian suda 1 lan sirah bali.

Tuladha 2

Ayo goleki conto liyane dina ing seminggu. Kita bakal nelpon poll () siji-siji ing dina minggu lan ndeleng kaya apa.

import java.util.LinkedList;
import java.util.Queue;

public class QueuePollMethod {

	public static void main(String[] args) {
        
        Queue days   = new LinkedList(); 
        
        days.add("Sunday");
        days.add("Monday");
        days.add("Tuesday");
        days.add("Wednesday");
        days.add("Thursday");
        days.add("Friday");
        days.add("Saturday");

        // print all the days in the week
        System.out.println("Week Days: \t" + days + "\n"); 
  
        // after calling poll()
        System.out.println("poll() returned: " + days.poll()); 
        System.out.println("Days Updated!\t" + days + "\n"); 

        // after calling poll()
        System.out.println("poll() returned: " + days.poll()); 
        System.out.println("Days Updated!\t" + days + "\n"); 
        
        // after calling poll()
        System.out.println("poll() returned: " + days.poll()); 
        System.out.println("Days Updated!\t" + days + "\n");                   
	}
}

Output

Carane poll () beda saka Ndeleng () lan mbusak ()?

Gampang banget kanggo pamula nyampurake telung konsep sing beda amarga katon meh padha. Ayo "q" dadi antrian, banjur iki bedane:

• q.poll () : mbusak lan retrieves sirah antrian
• q.peek() : ora mbusak nanging mung njupuk / bali sirah antrian
• q.remove () : mbusak lan retrieves sirah antrian

Dadi katon sing mbusak () lan jajak pendapat () persis padha. Dheweke kerjane identik ing kahanan normal. Nanging nalika antrian kosong, mbusak () mbuwang NoSuchElementException , nalika polling ngasilake null .

Tuladha 3

Saiki ayo goleki sawetara conto saka telung fungsi ing ndhuwur.

import java.util.LinkedList;
import java.util.Queue;

public class QueuePollMethod {

	public static void main(String[] args) {
        
        Queue days   = new LinkedList(); 
        
        days.add("Sunday");
        days.add("Monday");
        days.add("Tuesday");
        days.add("Wednesday");
        days.add("Thursday");
        days.add("Friday");
        days.add("Saturday");

        // print all the days in the week
        System.out.println("Week Days: \t" + days + "\n"); 
  
        // after calling peek()
        System.out.println("peek() returned: " + days.peek()); 
        System.out.println("Week Days: \t" + days + "\n"); 

        System.out.println("peek() returned: " + days.peek()); 
        System.out.println("Week Days: \t" + days + "\n"); 
        
        // after calling remove()
        System.out.println("remove() returned: " + days.remove()); 
        System.out.println("Days Updated!\t" + days + "\n"); 
        
        System.out.println("remove() returned: " + days.remove()); 
        System.out.println("Days Updated!\t" + days + "\n"); 
       
        System.out.println("remove() returned: " + days.remove()); 
        System.out.println("remove() returned: " + days.remove()); 
        System.out.println("remove() returned: " + days.remove()); 
        System.out.println("remove() returned: " + days.remove()); 

        System.out.println("Days Updated!\t" + days + "\n"); 
 
        // after calling poll()
        System.out.println("poll() returned: " + days.poll()); 
        System.out.println("Days Updated!\t" + days + "\n");           
        
        System.out.println("poll() returned: " + days.poll()); 
        System.out.println("remove() returned: " + days.remove()); 

	}
}

Output Nalika sampeyan bisa ndeleng sawise nelpon Ndeleng () weekdays tetep padha. Lan nalika kita nggunakake mbusak () utawa jajak pendapat () ukuran antrian suda 1 bebarengan karo bali sirah. Menapa malih, java.util.NoSuchElementException dibuwang nalika kita nelpon mbusak () ing antrian kosong, nalika ora istiméwa kuwi di buwang kanggo nggunakake jajak pendapat () .

Kesimpulan

Ing pungkasan, muga-muga sampeyan ngerti babagan panggunaan lan cara polling () saka Antrian. Nanging yen ana kebingungan, sampeyan bisa bali menyang kene kanggo konsultasi. Sugeng Coding!