New language features in Java 7
New language features in Java 7
I’m just back from the Devoxx conference in Antwerp. An update was given on the new language changes that will be in Java 7. The JDK currently has a release date of September 2010.
Here are 7 of the new features that have been completed:
* Language support for collections
* Automatic Resource Management
* Improved Type Inference for Generic Instance Creation (diamond)
* Underscores in numeric literals
* Strings in switch
* Binary literals
* Simplified Varargs Method Invocation
很多特性都非常有意思，比如：
List<String> list = new ArrayList<String>();
list.add("item");
String item = list.get(0);
Set<String> set = new HashSet<String>();
set.add("item");
Map<String, Integer> map = new HashMap<String, Integer>();
map.put("key", 1);
int value = map.get("key");
可以变为：
List<String> list = ["item"];
String item = list[0];
Set<String> set = {"item"};
Map<String, Integer> map = {"key" : 1};
int value = map["key"];
最有意思的是数字：
int one_million = 1_000_000;
