Update Add Last In Linked List.java

Author: Trilochna

Pepcoding/Linked Lists/Add Last In Linked List/Add Last In Linked List.java

@@ -1 +1,57 @@
+import java.io.*;
+import java.util.*;
 
+public class Main {
+  public static class Node {
+    int data;
+    Node next;
+  }
+
+  public static class LinkedList {
+    Node head;
+    Node tail;
+    int size;
+
+    void addLast(int val) {
+      // Write your code here
+          Node temp = new node();
+          temp.data = val;
+          temp.next = null;
+          
+          if(size == 0){
+              head = tail = temp;
+          }else {
+              tail.next = temp;
+              tail = temp;
+          }
+      size++;
+
+    }
+  }
+
+  public static void testList(LinkedList list) {
+    for (Node temp = list.head; temp != null; temp = temp.next) {
+      System.out.println(temp.data);
+    }
+    System.out.println(list.size);
+
+    if (list.size > 0) {
+      System.out.println(list.tail.data);
+    } 
+  }
+  public static void main(String[] args) throws Exception {
+    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    LinkedList list = new LinkedList();
+
+    String str = br.readLine();
+    while(str.equals("quit") == false){
+      if(str.startsWith("addLast")){
+        int val = Integer.parseInt(str.split(" ")[1]);
+        list.addLast(val);
+      } 
+      str = br.readLine();
+    }
+
+    testList(list);
+  }
+}