Java @SuppressWarnings注解用法

@SuppressWarnings注解主要用在取消一些编译器产生的警告,
在 IDE 中对代码左侧行列的遮挡,有时候这会挡住我们断点调试时打的断点。

@SuppressWarnings其注解目标为类、字段、函数、函数入参、构造函数和函数的局部变量。建议把注解放在最近进警告发生的位置。 下面列举警告关键字:

@Target({TYPE, FIELD, METHOD, PARAMETER, CONSTRUCTOR, LOCAL_VARIABLE})
@Retention(RetentionPolicy.SOURCE)
public @interface SuppressWarnings

关键字注解 value 用途
allto suppress all warnings (抑制所有警告)
boxingto suppress warnings relative to boxing/unboxing operations (抑制装箱、拆箱操作时候的警告)
castto suppress warnings relative to cast operations (抑制映射相关的警告)
dep-annto suppress warnings relative to deprecated annotation (抑制启用注释的警告)
deprecationto suppress warnings relative to deprecation (抑制过期方法警告)
fallthroughto suppress warnings relative to missing breaks in switch statements (抑制确在switch中缺失breaks的警告)
finallyto suppress warnings relative to finally block that don’t return (抑制finally模块没有返回的警告)
hidingto 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-switchto suppress warnings relative to missing entries in a switch statement (enum case)(忽略没有完整的switch语句)
nlsto suppress warnings relative to non-nls string literals( 忽略非nls格式的字符)
nullto suppress warnings relative to null analysis( 忽略对null的操作)
rawtypesto 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)
restrictionto 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)
serialto 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-accessto suppress warnings relative to incorrect static access( 抑制不正确的静态访问方式警告)
synthetic-accessto 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)
uncheckedto suppress warnings relative to unchecked operations( 抑制没有进行类型检查操作的警告)
unqualified-field-accessto suppress warnings relative to field access unqualified( 抑制没有权限访问的域的警告)
unusedto suppress warnings relative to unused code( 抑制没被使用过的代码的警告)