Fix check parameter code error and optimize code format

Signed-off-by: viviel <viviel@163.com>

redisson/src/main/java/org/redisson/RedissonMap.java

@@ -873,7 +873,7 @@ public class RedissonMap<K, V> extends RedissonExpirable implements RMap<K, V> {
     @Override
     public RFuture<V> putIfAbsentAsync(K key, V value) {
         checkKey(key);
-        checkValue(key);
+        checkValue(value);
         
         RFuture<V> future = putIfAbsentOperationAsync(key, value);
         if (hasNoWriter()) {
@@ -881,7 +881,7 @@ public class RedissonMap<K, V> extends RedissonExpirable implements RMap<K, V> {
         }
         
         MapWriterTask.Add task = new MapWriterTask.Add(key, value);
-        return mapWriterFuture(future, task, r -> r == null);
+        return mapWriterFuture(future, task, Objects::isNull);
     }
 
     protected boolean hasNoWriter() {