Поиск по subbytes

src/main/java/ru/serega6531/packmate/utils/Bytes.java

@@ -0,0 +1,26 @@
+package ru.serega6531.packmate.utils;
+
+public class Bytes {
+
+    public static int indexOf(byte[] array, byte[] target) {
+        return indexOf(array, target, 0, array.length);
+    }
+
+    public static int indexOf(byte[] array, byte[] target, int start, int end) {
+        if (target.length == 0) {
+            return 0;
+        }
+
+        outer:
+        for (int i = start; i < end - target.length + 1; i++) {
+            for (int j = 0; j < target.length; j++) {
+                if (array[i + j] != target[j]) {
+                    continue outer;
+                }
+            }
+            return i;
+        }
+        return -1;
+    }
+
+}