Java版本特性

Apr 4, 2020

 java  java

允许使用数值文字的加强

int billion = 1_000_000_000;

允许在switch中使用字符串

String availability = "available";
switch(availability) {}

允许使用前缀0b创建二进制文字

int binary = 0b1001_1001;

集合语言简写

List list = ["item"];
String item = list[0];

Set set = {"item"};

Map map = {"key" : 1};
int value = map["key"];

参考资料

http://code.joejag.com/2009/new-language-features-in-java-7.html http://openjdk.java.net/projects/coin/ http://developer.51cto.com/art/201004/194814_1.htm