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LL.java
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86 lines (77 loc) · 2.22 KB
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package revision;
public class LL {
private LNode head;
public LL(){
}
public LL(LNode head){
this.head=head;
}
public void setHead(LNode head) {
this.head = head;
}
public LNode getHead() {
return head;
}
// method ............
public boolean isEmpty(){
return head == null;
}
public void addToFront(int data){
head= new LNode(data, head);
}
public void addToEnd(int data){
if (isEmpty()) {
addToFront(data);
}else {
LNode newNode = new LNode(data);
LNode helpPointer = head;
while (helpPointer.getNext() != null) {
helpPointer = helpPointer.getNext();
}
helpPointer.setNext(newNode);
}
}
public void print (){
LNode helpPointer =head;
while (helpPointer != null) {
System.out.print(helpPointer.getData() + " , ");
helpPointer=helpPointer.getNext();
}
System.out.println();
}
public void removeFromEnd(){
if (isEmpty()) {
System.out.println("Error : pro your linked list is empty pro ..!!");
} else if (head.getNext() == null) {
head=null;
} else {
LNode helpPointer = head;
while (helpPointer.getNext().getNext() != null) {
helpPointer = helpPointer.getNext();
}
helpPointer.setNext(null);
}
}
public boolean isFind(int data){
LNode helpPointer =head;
while (helpPointer != null) {
if (helpPointer.getData() == data)
return true;
helpPointer=helpPointer.getNext();
}
return false;
}
public void remove(int data){
if (isFind(data)){
LNode helpPointer =head;
while (helpPointer.getNext() != null) {
if (helpPointer.getNext().getData()==data){
helpPointer.setNext(helpPointer.getNext().getNext());
break;
}
helpPointer=helpPointer.getNext();
}
}else
System.out.println("Error : this data is not found it ...!!");
}
}