Fixed a few typos

java/memory/src/main/java/io/netty/buffer/ArrowBuf.java

@@ -208,7 +208,7 @@ public ArrowBuf retain(BufferAllocator target) {
    * that carries an association with the underlying memory of this ArrowBuf. If this ArrowBuf is
    * connected to the
    * owning BufferLedger of this memory, that memory ownership/accounting will be transferred to
-   * the taret allocator. If
+   * the target allocator. If
    * this ArrowBuf does not currently own the memory underlying it (and is only associated with
    * it), this does not
    * transfer any ownership to the newly created ArrowBuf.

java/memory/src/main/java/org/apache/arrow/memory/BaseAllocator.java

@@ -640,7 +640,7 @@ private void dumpBuffers(final StringBuilder sb, final Set<BufferLedger> ledgerS
         continue;
       }
       final UnsafeDirectLittleEndian udle = ledger.getUnderlying();
-      sb.append("UnsafeDirectLittleEndian[dentityHashCode == ");
+      sb.append("UnsafeDirectLittleEndian[identityHashCode == ");
       sb.append(Integer.toString(System.identityHashCode(udle)));
       sb.append("] size ");
       sb.append(Integer.toString(udle.capacity()));

java/vector/src/main/java/org/apache/arrow/vector/ValueVector.java

@@ -47,7 +47,7 @@
  *   <li>you should never write to a vector once it has been read.</li>
  * </ul>
  *
- * Please note that the current implementation doesn't enfore those rules, hence we may find few places that
+ * Please note that the current implementation doesn't enforce those rules, hence we may find few places that
  * deviate from these rules (e.g. offset vectors in Variable Length and Repeated vector)
  *
  * This interface "should" strive to guarantee this order of operation:

java/vector/src/main/java/org/apache/arrow/vector/complex/AbstractContainerVector.java

@@ -79,7 +79,7 @@ protected <T extends ValueVector> T typeify(ValueVector v, Class<T> clazz) {
     if (clazz.isAssignableFrom(v.getClass())) {
       return clazz.cast(v);
     }
-    throw new IllegalStateException(String.format("Vector requested [%s] was different than type stored [%s]. Arrow doesn't yet support hetergenous types.", clazz.getSimpleName(), v.getClass().getSimpleName()));
+    throw new IllegalStateException(String.format("Vector requested [%s] was different than type stored [%s]. Arrow doesn't yet support heterogenous types.", clazz.getSimpleName(), v.getClass().getSimpleName()));
   }
 
   protected boolean supportsDirectRead() {

java/vector/src/main/java/org/apache/arrow/vector/complex/StateTool.java

@@ -28,7 +28,7 @@ public static <T extends Enum<?>> void check(T currentState, T... expectedStates
         return;
       }
     }
-    throw new IllegalArgumentException(String.format("Expected to be in one of these states %s but was actuall in state %s", Arrays.toString(expectedStates), currentState));
+    throw new IllegalArgumentException(String.format("Expected to be in one of these states %s but was actually in state %s", Arrays.toString(expectedStates), currentState));
   }
 
 }