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Fix for Issue #773. Deleting an element that doesn't exist causes NPE

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This commit is contained in:
Abhijay Kumar
2019-05-30 13:04:15 +05:30
parent 9b78621215
commit b6581eaa16
1 changed files with 7 additions and 2 deletions
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9
DataStructures/Lists/DoublyLinkedList.java
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@ -116,8 +116,13 @@ public class DoublyLinkedList {
public void delete(int x) { public void delete(int x) {
Link current = head; Link current = head;
while (current.value != x) // Find the position to delete while (current.value != x) {// Find the position to delete
current = current.next; if (current != tail) {
current = current.next;
} else {// If we reach the tail and the element is still not found
throw new RuntimeException("The element to be deleted does not exist!");
}
}
if (current == head) if (current == head)
deleteHead(); deleteHead();