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unsafe-migration/src/ViewBytes.java

@@ -0,0 +1,12 @@
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.VarHandle;
+import java.nio.ByteOrder;
+
+/** AFTER: the same access through a byte-array-view VarHandle (JDK 9). Bounds-checked; native byte order to match Unsafe. */
+public final class ViewBytes {
+    private ViewBytes() {}
+    private static final VarHandle VIEW = MethodHandles.byteArrayViewVarHandle(long[].class, ByteOrder.nativeOrder());
+
+    public static long get(byte[] a, int off) { return (long) VIEW.get(a, off); }
+    public static void put(byte[] a, int off, long v) { VIEW.set(a, off, v); }
+}