translation: Add Python and Java code for EN version (#1345)

* Add the intial translation of code of all the languages

* test

* revert

* Remove

* Add Python and Java code for EN version

en/codes/java/chapter_searching/linear_search.java

@@ -0,0 +1,50 @@
+/**
+ * File: linear_search.java
+ * Created Time: 2022-11-25
+ * Author: krahets (krahets@163.com)
+ */
+
+package chapter_searching;
+
+import utils.*;
+
+public class linear_search {
+    /* Linear search (array) */
+    static int linearSearchArray(int[] nums, int target) {
+        // Traverse array
+        for (int i = 0; i < nums.length; i++) {
+            // Found the target element, thus return its index
+            if (nums[i] == target)
+                return i;
+        }
+        // Did not find the target element, thus return -1
+        return -1;
+    }
+
+    /* Linear search (linked list) */
+    static ListNode linearSearchLinkedList(ListNode head, int target) {
+        // Traverse the list
+        while (head != null) {
+            // Found the target node, return it
+            if (head.val == target)
+                return head;
+            head = head.next;
+        }
+        // If the target node is not found, return null
+        return null;
+    }
+
+    public static void main(String[] args) {
+        int target = 3;
+
+        /* Perform linear search in array */
+        int[] nums = { 1, 5, 3, 2, 4, 7, 5, 9, 10, 8 };
+        int index = linearSearchArray(nums, target);
+        System.out.println("The index of target element 3 is " + index);
+
+        /* Perform linear search in linked list */
+        ListNode head = ListNode.arrToLinkedList(nums);
+        ListNode node = linearSearchLinkedList(head, target);
+        System.out.println("The corresponding node object for target node value 3 is " + node);
+    }
+}