在Java中寻找ConcurrentHashSet吗？ diwayou的专栏博客频道 CSDN.NET

在Java中寻找ConcurrentHashSet吗？

分类：
Java

2011-05-11 09:37
269人阅读
评论(0)
收藏
举报

方法一：Collections.newSetFromMap(new ConcurrentHashMap<Object,Boolean>())

方法二：（引用自Apache Mina，位置org.apache.mina.util.ConcurrentHashSet）

[java] view plaincopyprint?

packageorg.apache.mina.util;
importjava.util.Collection;
importjava.util.Set;
importjava.util.concurrent.ConcurrentHashMap;
importjava.util.concurrent.ConcurrentMap;
/**
*A{@linkConcurrentHashMap}-backed{@linkSet}.
*
*@author<ahref="http://mina.apache.org"mce_href="http://mina.apache.org">ApacheMINAProject</a>
*/
publicclassConcurrentHashSet<E>extendsMapBackedSet<E>{
privatestaticfinallongserialVersionUID=8518578988740277828L;
publicConcurrentHashSet(){
super(newConcurrentHashMap<E,Boolean>());
}
publicConcurrentHashSet(Collection<E>c){
super(newConcurrentHashMap<E,Boolean>(),c);
}
@Override
publicbooleanadd(Eo){
Booleananswer=((ConcurrentMap<E,Boolean>)map).putIfAbsent(o,Boolean.TRUE);
returnanswer==null;
}
}

package org.apache.mina.util; import java.util.Collection; import java.util.Set; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentMap; /** * A {@link ConcurrentHashMap}-backed {@link Set}. * * @author <a href="http://mina.apache.org" mce_href="http://mina.apache.org">Apache MINA Project</a> */ public class ConcurrentHashSet<E> extends MapBackedSet<E> { private static final long serialVersionUID = 8518578988740277828L; public ConcurrentHashSet() { super(new ConcurrentHashMap<E, Boolean>()); } public ConcurrentHashSet(Collection<E> c) { super(new ConcurrentHashMap<E, Boolean>(), c); } @Override public boolean add(E o) { Boolean answer = ((ConcurrentMap<E, Boolean>) map).putIfAbsent(o, Boolean.TRUE); return answer == null; } }

标签 java, NC, SE

在Java中寻找ConcurrentHashSet吗？ diwayou的专栏 博客频道 CSDN.NET

在Java中寻找ConcurrentHashSet吗？

在Java中寻找ConcurrentHashSet吗？ diwayou的专栏博客频道 CSDN.NET