Create 028. Implement strStr().java

Author: futurus

028. Implement strStr().java

@@ -0,0 +1,24 @@
+public class Solution {
+    public int strStr(String haystack, String needle) {
+        if (needle.length() == 0) return 0;
+        
+        int h = 0;
+        while (h <= haystack.length() - needle.length()) {
+            if (haystack.charAt(h) == needle.charAt(0)) {
+                boolean match = true;
+                for (int n = 0, hP = h; n < needle.length(); n++, hP++) {
+                    if (haystack.charAt(hP) != needle.charAt(n)) {
+                        match = false;
+                        break;
+                    }
+                }
+                if (match == true) {
+                    return h;
+                }
+            }
+            h++;
+        }
+        
+        return -1;
+    }
+}