Java List | Java Tutorial For Beginners

Veröffentlicht am: 06 Mai 2019
auf dem Kanal: Besant Technologies

433

Java List Interface is the subinterface of Collection. It contains index-based methods to insert and delete elements. It is a factory of Java List Iterator interface.

Java List Interface declaration public interface List(E) extends Collection(E)

Methods of Java List - void add(int index, E element) - It is used to insert the specified element at the specified position in a list.

boolean add(E e) - It is used to append the specified element at the end of a list.

boolean addAll - It is used to append all of the elements in the specified collection to the end of a list.

boolean addAll - It is used to append all the elements in the specified collection, starting at the specified position of the list.

void clear() - It is used to remove all of the elements from this list.

boolean equals(Object o) - It is used to compare the specified object with the elements of a list.

int hashcode() - It is used to return the hash code value for a list.

E get(int index) - It is used to fetch the element from the particular position of the list.

boolean isEmpty() - It returns true if the list is empty, otherwise false.

int lastIndexOf(Object o) - It is used to return the index in this list of the last occurrence of the specified element, or -1 if the list does not contain this element.

Object[] toArray() - It is used to return an array containing all of the elements in this list in the correct order.

T[] toArray(T[] a) - It is used to return an array containing all of the elements in this list in the correct order.

boolean contains(Object o) - It returns true if the list contains the specified element

boolean containsAll - It returns true if the list contains all the specified element

int indexOf(Object o) - It is used to return the index in this list of the first occurrence of the specified element, or -1 if the List does not contain this element.

E remove(int index) - It is used to remove the element present at the specified position in the list.

boolean remove(Object o) - It is used to remove the first occurrence of the specified element.

boolean removeAll - It is used to remove all the elements from the list.

void replaceAll(UnaryOperatoroperator) - It is used to replace all the elements from the list with the specified element.

void retainAll - It is used to retain all the elements in the list that are present in the specified collection.

E set(int index, E element) - It is used to replace the specified element in the list, present at the specified position.

void sort - It is used to sort the elements of the list on the basis of specified comparator.

Spliterator spliterator() - It is used to create spliterator over the elements in a list.

List(E) subList(int fromIndex, int toIndex) - It is used to fetch all the elements lies within the given range.

int size() - It is used to return the number of elements present in the list.

Java List Example :-
import java.util.*;
public class ListExample{
public static void main(String args[]){
List(String) al=new ArrayList(String)();
al.add("xzy");
al.add("Abc");
al.add("Sdc");
al.add(1,"Vcd");
System.out.println("An element at 2nd position: "+al.get(2));
for(String s:al){
System.out.println(s);
}
}
}

Java List Output:
An element at 2nd position: Abc
xzy
Vcd
Abc
Sdc

Java Training in Chennai:
https://www.besanttechnologies.com/tr...

Java Training in Bangalore:
https://www.besanttechnologies.com/tr...

Java Interview Questions & Answers :
https://www.besanttechnologies.com/ja...

FACEBOOK :   / besanttechnologies
TWITTER :   / besanttech
LINKEDIN :   / besant-technologies
Instagram :   / besant_technologies

For Java Training and Certification, Call us: +91 996 252 8293 & +91 996 252 8294 (Or) write back to us at info@besanttech.com

#JavaList #Java #JavaTutorial

Auf dieser Seite können Sie das Online-Video Java List | Java Tutorial For Beginners mit der Dauer stunde minuten sekunde in guter Qualität ansehen, das der Benutzer Besant Technologies 06 Mai 2019 hochgeladen hat, den Link mit Freunden und Bekannten teilen, dieses Video wurde auf Youtube bereits 433 Mal angesehen und es wurde von 1 den Zuschauern gefallen. Viel Spaß beim Betrachtenden Zuschauern gefallen!