fix code

hutool-cache/src/main/java/cn/hutool/cache/Cache.java

@@ -83,14 +83,6 @@ public interface Cache<K, V> extends Iterable<V>, Serializable {
 	 */
 	V get(K key, boolean isUpdateLastAccess);
 
-	/**
-	 * 返回缓存迭代器
-	 * 
-	 * @return 缓存迭代器
-	 */
-	@Override
-	Iterator<V> iterator();
-
 	/**
 	 * 返回包含键和值得迭代器
 	 * 

hutool-cache/src/main/java/cn/hutool/cache/file/LFUFileCache.java

@@ -45,20 +45,19 @@ public class LFUFileCache extends AbstractFileCache{
 
 	@Override
 	protected Cache<File, byte[]> initCache() {
-		Cache<File, byte[]> cache = new LFUCache<File, byte[]>(this.capacity, this.timeout) {
-			private static final long serialVersionUID = 1L;
-			
+		return new LFUCache<File, byte[]>(LFUFileCache.this.capacity, LFUFileCache.this.timeout) {
+			private static final long serialVersionUID1 = 1L;
+
 			@Override
 			public boolean isFull() {
 				return LFUFileCache.this.usedSize > this.capacity;
 			}
-			
+
 			@Override
 			protected void onRemove(File key, byte[] cachedObject) {
 				usedSize -= cachedObject.length;
 			}
 		};
-		return cache;
 	}
 
 }

hutool-cache/src/main/java/cn/hutool/cache/file/LRUFileCache.java

@@ -45,20 +45,19 @@ public class LRUFileCache extends AbstractFileCache{
 
 	@Override
 	protected Cache<File, byte[]> initCache() {
-		Cache<File, byte[]> cache = new LRUCache<File, byte[]>(this.capacity, super.timeout) {
-			private static final long serialVersionUID = 1L;
-			
+		return new LRUCache<File, byte[]>(LRUFileCache.this.capacity, super.timeout) {
+			private static final long serialVersionUID1 = 1L;
+
 			@Override
 			public boolean isFull() {
 				return LRUFileCache.this.usedSize > this.capacity;
 			}
-			
+
 			@Override
 			protected void onRemove(File key, byte[] cachedObject) {
 				usedSize -= cachedObject.length;
 			}
 		};
-		return cache;
 	}
 
 }

hutool-cache/src/main/java/cn/hutool/cache/impl/CacheObj.java

@@ -20,7 +20,7 @@ public class CacheObj<K, V> implements Serializable{
 	/** 访问次数 */
 	protected long accessCount;
 	/** 对象存活时长，0表示永久存活*/
-	private long ttl;
+	private final long ttl;
 	
 	/**
 	 * 构造

hutool-cache/src/main/java/cn/hutool/cache/impl/CacheObjIterator.java

@@ -23,7 +23,6 @@ public class CacheObjIterator<K, V> implements Iterator<CacheObj<K, V>>, Seriali
 	 * 构造
 	 * 
 	 * @param iterator 原{@link Iterator}
-	 * @param readLock 读锁
 	 */
 	CacheObjIterator(Iterator<CacheObj<K, V>> iterator) {
 		this.iterator = iterator;

hutool-cache/src/main/java/cn/hutool/cache/impl/CacheValuesIterator.java

@@ -17,7 +17,6 @@ public class CacheValuesIterator<V> implements Iterator<V>, Serializable {
 	/**
 	 * 构造
 	 * @param iterator 原{@link CacheObjIterator}
-	 * @param readLock 读锁
 	 */
 	CacheValuesIterator(CacheObjIterator<?, V> iterator) {
 		this.cacheObjIter = iterator;