ARROW-5014: [Java] Fix typos in Flight module

java/flight/src/main/java/org/apache/arrow/flight/FlightClient.java

@@ -80,7 +80,7 @@ public FlightClient(BufferAllocator incomingAllocator, Location location) {
 
   /**
    * Get a list of available flights.
-   * @param criteria Critera for selecting flights
+   * @param criteria Criteria for selecting flights
    * @return FlightInfo Iterable
    */
   public Iterable<FlightInfo> listFlights(Criteria criteria) {

java/flight/src/main/java/org/apache/arrow/flight/FlightProducer.java

@@ -23,7 +23,7 @@
 import org.apache.arrow.vector.VectorSchemaRoot;
 
 /**
- * API to Implement an Arrow Flight server.
+ * API to Implement an Arrow Flight producer.
  */
 public interface FlightProducer {
 

java/flight/src/main/java/org/apache/arrow/flight/example/FlightHolder.java

@@ -56,7 +56,7 @@ public Stream getStream(ExampleTicket ticket) {
   }
 
   public Stream.StreamCreator addStream(Schema schema) {
-    Preconditions.checkArgument(schema.equals(schema), "Stream schema inconsitent with existing schema.");
+    Preconditions.checkArgument(schema.equals(schema), "Stream schema inconsistent with existing schema.");
     return new Stream.StreamCreator(schema, allocator, t -> {
       synchronized (streams) {
         streams.add(t);

java/flight/src/main/java/org/apache/arrow/flight/example/InMemoryStore.java

@@ -143,7 +143,7 @@ public Result doAction(Action action) {
   @Override
   public void listActions(StreamListener<ActionType> listener) {
     listener.onNext(new ActionType("get", "pull a stream. Action must be done via standard get mechanism"));
-    listener.onNext(new ActionType("put", "push a stream. Action must be done via standard get mechanism"));
+    listener.onNext(new ActionType("put", "push a stream. Action must be done via standard put mechanism"));
     listener.onNext(new ActionType("drop", "delete a flight. Action body is a JSON encoded path."));
     listener.onCompleted();
   }

java/flight/src/main/java/org/apache/arrow/flight/grpc/AddWritableBuffer.java

@@ -30,7 +30,7 @@
 /**
  * Allow a user to add a ByteBuf based InputStream directly into GRPC WritableBuffer to avoid an
  * extra copy. This could be solved in GRPC by adding a ByteBufListable interface on InputStream and
- * letting BufferChainOutputStream take adavantage of it.
+ * letting BufferChainOutputStream take advantage of it.
  */
 public class AddWritableBuffer {
 

java/flight/src/test/java/org/apache/arrow/flight/perf/PerformanceTestServer.java

@@ -36,7 +36,6 @@
 import org.apache.arrow.flight.Result;
 import org.apache.arrow.flight.Ticket;
 import org.apache.arrow.flight.auth.ServerAuthHandler;
-import org.apache.arrow.flight.example.ExampleFlightServer;
 import org.apache.arrow.flight.impl.Flight.PutResult;
 import org.apache.arrow.flight.perf.impl.PerfOuterClass.Perf;
 import org.apache.arrow.flight.perf.impl.PerfOuterClass.Token;
@@ -54,7 +53,7 @@
 
 public class PerformanceTestServer implements AutoCloseable {
 
-  private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ExampleFlightServer.class);
+  private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(PerformanceTestServer.class);
 
   private final FlightServer flightServer;
   private final Location location;