@SuppressWarnings注解的作用
告诉编译器忽略指定的警告,不在编译完成后出现警告信息,这些警告信息显示在代码左侧行列栏,会挡住调试时的断点。可注解类、字段、方法、参数、局部变量、构造函数。
使用方式
-
@SuppressWarnings("")
如:@SuppressWarnings("unchecked")
,@SuppressWarnings("unchecked","rawtypes")
-
@SuppressWarnings({})
如:@SuppressWarnings({"unchecked","rawtypes"})
-
@SuppressWarnings(value={})
如:@SuppressWarnings(value={"unchecked","rawtypes"})
@SuppressWarnings("static-access")
public void fo(){
...
}
用途列表
根据使用需要,选择表中的关键字。
关键字 | 用途 |
---|---|
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 unqualifiedv ( 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) |