Added Linear Search function in Java8 (#19214)

client/src/pages/guide/english/algorithms/search-algorithms/linear-search/index.md

@@ -105,6 +105,20 @@ func linearSearch(for number: Int, in array: [Int]) -> Int? {
 }
 ```
 
+### Example in Java
+```Java 8
+int linearSearch(int[] arr, int element)
+{
+        for(int i=0;i<arr.length;i++)
+        {
+                if(arr[i] == element)
+                        return i;
+        }
+        return -1;
+}
+
+```
+        
 ## Global Linear Search
 
 What if you are searching the multiple occurrences of an element? For example you want to see how many 5’s are in an array.