Java —— 爆出警告？如何忽略？(@SuppressWarnings())

问题

在Idea或一些代码检查中，会检测我们的代码，并爆出相关警告。但如果代码检测有偏差，如何消除警告呢？

解决

使用@SuppressWarnings()注解。

代码示例

//忽略uncheck类型的警告
@SuppressWarnings("unchecked")

//忽略uncheck、rawtypes类型的警告
@SuppressWarnings("unchecked","rawtypes") 

//忽略所有警告
@SuppressWarnings("all") 

汇总

警告类型	官方解释	中文翻译
all	to suppress all warnings	抑制所有警告
boxing	to suppress warnings relative to boxing/unboxing operations	抑制装箱、拆箱操作时候的警告
cast	to suppress warnings relative to cast operations	抑制映射相关的警告
dep-ann	to suppress warnings relative to deprecated annotation	抑制启用注释的警告
deprecation	to suppress warnings relative to deprecation	抑制过期方法警告
fallthrough	to suppress warnings relative to missing breaks in switch statements	抑制在switch中缺失break的警告
finally	to suppress warnings relative to finally block that don’t return	抑制finally模块没有返回的警告
hiding	to suppress warnings relative to locals that hide variable	抑制相对于隐藏变量的局部变量的警告
incomplete-switch	to suppress warnings relative to missing entries in a switch statement (enum case)	忽略没有完整的switch语句
nls	to suppress warnings relative to non-nls string literals	忽略非nls格式的字符
null	to suppress warnings relative to null analysis	忽略对null的操作
rawtypes	to suppress warnings relative to un-specific types when using generics on class params	使用generics时忽略没有指定相应的类型
restriction	to suppress warnings relative to usage of discouraged or forbidden references	抑制禁止使用劝阻或禁止引用的警告
serial	to suppress warnings relative to missing serialVersionUID field for a serializable class	忽略在serializable类中没有声明serialVersionUID变量
static-access	to suppress warnings relative to incorrect static access	抑制不正确的静态访问方式警告
synthetic-access	to suppress warnings relative to unoptimized access from inner classes	抑制子类没有按最优方法访问内部类的警告
unchecked	to suppress warnings relative to unchecked operations	抑制没有进行类型检查操作的警告
unqualified-field-access	to suppress warnings relative to field access unqualified	抑制没有权限访问的域的警告
unused	to suppress warnings relative to unused code	抑制没被使用过的代码的警告