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文件名称：Identifiers(标识符)-java课件的资源
文件大小：1.43MB
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更新时间：2021-04-26 09:28:22
java
Identifiers(标识符)
标识符是用于标只某一事物的符号，Java程序中的类名、方法名和变量名都属于标识符。
Rules:
An identifier is a sequence of characters that consist of letters, digits, underscores (_), and dollar signs ($).
An identifier must start with a letter, an underscore (_), or a dollar sign ($).
It cannot start with a digit.
An identifier cannot be a reserved word. (See Appendix A, “Java Keywords,” for a list of reserved words).
It is Case-sensitive : Scanner is different from scanner
An identifier can be of any length.