在开发中,有时候IDE/编译器会给出一些没有必要的告警。可以通过@SuppressWarnings来屏蔽。@SuppressWarnings有很多种面向场景,下面一一列出:

@SuppressWarnings(String str)

  1. @SuppressWarnings(“unchecked”) [^ 抑制单类型的警告]
  2. @SuppressWarnings(“unchecked”,”rawtypes”) [^ 抑制多类型的警告]
  3. @SuppressWarnings(“unchecked”) [^ 抑制所有类型的警告]
  • “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 (抑制确在switch中缺失breaks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)