java - private long nextId = -1L
PHPz
PHPz 2017-04-17 15:14:50
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private long nextId = -1L 是什么意思?

PHPz
PHPz

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伊谢尔伦

Declare a private long variable with the variable name nextId, initialize it, and assign the value to -1.

-1L means this is a long型常量

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