1. Java annotation
Refer to my blog: http://pan33.iteye.com/blog/1154933
2. 自动装箱
3. 循环增强
4. 枚举类型
5. 可变参数
6. 泛型 (Generic Types)
java 泛型详解: http://lichaozhangobj.iteye.com/blog/476911
7. 静态引入
8. 格式化输入输出
Refer to: http://ayaya.iteye.com/blog/139318
http://wenku.baidu.com/view/29767bd333d4b14e84246805.html
9. 新的线程模型和并发库
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