Merge pull request #1365 from TheAlgorithms/revert-1362-z-function

Revert "z function added"

DIRECTORY.md

@@ -211,6 +211,3 @@
   * [ShellSort](https://github.com/TheAlgorithms/Java/blob/master/Sorts/ShellSort.java)
   * [SortAlgorithm](https://github.com/TheAlgorithms/Java/blob/master/Sorts/SortAlgorithm.java)
   * [SortUtils](https://github.com/TheAlgorithms/Java/blob/master/Sorts/SortUtils.java)
-
-## Strings
-  * [ZFunction](https://github.com/TheAlgorithms/Java/blob/master/Strings/ZFunction.java)

Strings/ZFunction.java

@@ -1,33 +0,0 @@
-// Initialisation of strings algorithm Z function
-// detailed review and proper examples can be seen on the link bewlow
-//
-// Link of algorithm review: https://www.geeksforgeeks.org/z-algorithm-linear-time-pattern-searching-algorithm/
-package Strings;
-
-public class ZFunction {
-    private String string;
-
-    public ZFunction(String string){
-        this.string = string;
-    }
-
-    public int[] getArray(){
-        int length = string.length();
-        int[] z = new int[length];
-        int l = 0, r = 0;
-        for (int i=0; i<length; i++){
-            if (i > l && i <= r){
-                z[i] = Math.min(z[i - l], r - i + 1);
-            }
-            while (i + z[i] < length && string.charAt(z[i]) == string.charAt(i + z[i])){
-                z[i]++;
-            }
-            if (i + z[i] > r){
-                l = i;
-                r = i + z[i] - 1;
-            }
-        }
-
-        return z;
-    }
-}