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SinglyLinkedListDeleteMethod
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SinglyLinkedListDeleteMethod
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/**
** Delete Method in linked list
**/
/****************************Remove First***********************/
public class SinglyLinkedList {
…
public void removeFirst() {
if (head == null)
return;
else {
if (head == tail) {
head = null;
tail = null;
} else {
head = head.next;
}
}
}
/****************************Remove Last***********************/
public void removeLast() {
if (tail == null)
return;
else {
if (head == tail) {
head = null;
tail = null;
} else {
SinglyLinkedListNode previousToTail = head;
while (previousToTail.next != tail)
previousToTail = previousToTail.next;
tail = previousToTail;
tail.next = null;
}
}
}
/****************************Remove After***********************/
public void removeNext(SinglyLinkedListNode previous) {
if (previous == null)
removeFirst();
else if (previous.next == tail) {
tail = previous;
tail.next = null;
} else if (previous == tail)
return;
else {
previous.next = previous.next.next;
}
}
}