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Commit 5c54ced

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iterate-through-a-hashmap
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‎README.md

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* [Java += 操作符实质](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/contents/java-operator.md)
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* [将InputStream转换为String](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/read-convert-an-inputstream-to-a-string.md)
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* [将数组转换为List](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/create-arraylist-arraylistt-from-array-t.md)
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* [如何遍历map对象](https://github.com/giantray/stackoverflow-java-top-qa/blob/master/iterate-through-a-hashmap.md)
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> 代码规范
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- [Proper use cases for Android UserManager.isUserAGoat()?](http://stackoverflow.com/questions/13375357/proper-use-cases-for-android-usermanager-isuseragoat)
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- [Differences between HashMap and Hashtable?](http://stackoverflow.com/questions/40471/differences-between-hashmap-and-hashtable)
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- [Creating a memory leak with Java [closed]](http://stackoverflow.com/questions/6470651/creating-a-memory-leak-with-java)
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- [Iterate through a HashMap [duplicate]](http://stackoverflow.com/questions/1066589/iterate-through-a-hashmap)
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- [Why is char[] preferred over String for passwords?](http://stackoverflow.com/questions/8881291/why-is-char-preferred-over-string-for-passwords)
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- [Generating random integers in a range with Java](http://stackoverflow.com/questions/363681/generating-random-integers-in-a-range-with-java)
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- [Why is printing "B" dramatically slower than printing "#"?](http://stackoverflow.com/questions/21947452/why-is-printing-b-dramatically-slower-than-printing)

‎contents/iterate-through-a-hashmap.md

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##如何遍历map对象(如HashMap)
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###jdk1.5以上版本
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```java
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for (Entry<String, String> entry : map.entrySet()){
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System.out.println(entry.getKey() + "/" + entry.getValue());
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}
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```
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需要 import java.util.Map.Entry;
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###jdk1.4以下版本
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```java
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Iterator entries = myMap.entrySet().iterator();
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while (entries.hasNext()) {
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Entry thisEntry = (Entry) entries.next();
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Object key = thisEntry.getKey();
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Object value = thisEntry.getValue();
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}
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```
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stackoverflow链接:
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http://stackoverflow.com/questions/271526/avoiding-null-statements-in-java?page=2&tab=votes#tab-top

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