@Test
    public void howToBatchGet_FromMultipleTables() {
        BatchGetItemOutcome outcome = dynamo.batchGetItem(
            // First table
            new TableKeysAndAttributes(TABLE_NAME)
                .withAttrbuteNames("binary", "booleanTrue", "intAttr",
                        "mapAttr", "stringSetAttr")
                // you can add a bunch of keys in one go
                .addHashAndRangePrimaryKeys(
                    HASH_KEY_NAME, RANGE_KEY_NAME,
                    "foo",          1,
                    "foo",          2,
                    "foo",          3
                    // etc.
                ),
            // Second table
            new TableKeysAndAttributes(F_UpdateItemTest.TABLE_NAME)
                .withAttrbuteNames(F_UpdateItemTest.HASH_KEY, F_UpdateItemTest.RANGE_KEY, "AddressLine1",
                        "city", "state", "zipcode", "phone")
                // you can add a bunch of keys in one go
                .addHashAndRangePrimaryKeys(
                    F_UpdateItemTest.HASH_KEY,          F_UpdateItemTest.RANGE_KEY,
                    F_UpdateItemTest.FIRST_CUSTOMER_ID, F_UpdateItemTest.ADDRESS_TYPE_HOME,
                    F_UpdateItemTest.FIRST_CUSTOMER_ID, F_UpdateItemTest.ADDRESS_TYPE_WORK
                    // etc.
                )
            );
        Map<String, List<Item>> tableItems = outcome.getTableItems();
        Assert.assertTrue(tableItems.size() == 2);
        for (Map.Entry<String, List<Item>> e: tableItems.entrySet()) {
            String tableName = e.getKey();
            System.out.println("tableName: " + tableName);
            for (Item item: e.getValue()) {
                System.out.println("item: " + item);
            }
            if (tableName.equals(TABLE_NAME))
                Assert.assertTrue(e.getValue().size() == 3);
            else 
                Assert.assertTrue(e.getValue().size() == 2);
        }
    }
Sample code to perform batch get items from DynamoDB.
src/samples/AmazonDynamoDBDocumentAPI/quick-start/com/amazonaws/services/dynamodbv2/document/quickstart/H_BatchGetItemTest.java