1. Writing Numeric Literals with Underscores Underscores can appear anywhere between digits in a numerical literal. We can use the underscores in all literal types: byte int long float double Note thatconsecutive underscores are allowed. ’10___00′ is a valid number. //Supported in bytebyteimp...
The following example shows other ways you can use the underscore in numeric literals: long creditCardNumber = 1234_5678_9012_3456L; long socialSecurityNumber = 999_99_9999L; float pi = 3.14_15F; long hexBytes = 0xFF_EC_DE_5E; long hexWords = 0xCAFE_BABE; long maxLong = 0x7fff_fff...
Rules for using Numeric Literals with Underscores in Java 7 With the first binary number being broken into quartets by separating every fourth number by an underscore, or with the second binary number being broken up into octets, separate by two underscores, the numbers become much more ...
There appears to be no guideline for underscores at the moment. Perhaps it is intended to be left to the programmer, but in particular, I think specifying whether or not underscores are encouraged between a literal and its type, e.g. 5u3...
常见于图片资源。可以生成R.java,但是R.java文件内报错:Underscores can only be used with source level 1.7 or greater 1.Java标识符不能以数字开头,第一个字符应该是字母。 2.下划线。Java 7中引入了一个新特性“Underscores in Numeric Literals”。譬如1_000就是1000。