@SuppressWarings注解警告类型

来源:互联网 发布:综艺后期制作软件 编辑:程序博客网 时间:2024/05/17 03:37

一、 @SuppressWarings注解                            

  作用:用于抑制编译器产生警告信息。

  示例1——抑制单类型的警告:

复制代码
@SuppressWarnings("unchecked")public void addItems(String item){  @SuppressWarnings("rawtypes")   List items = new ArrayList();   items.add(item);}
复制代码

  示例2——抑制多类型的警告:

@SuppressWarnings(value={"unchecked", "rawtypes"})public void addItems(String item){   List items = new ArrayList();   items.add(item);}

  示例3——抑制所有类型的警告:

@SuppressWarnings("all")public void addItems(String item){   List items = new ArrayList();   items.add(item);}

 

三、注解目标                                

 通过 @SuppressWarnings 的源码可知,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。

 而家建议注解应声明在最接近警告发生的位置。

 

四、抑制警告的关键字                                

关键字用途allto suppress all warningsboxing to suppress warnings relative to boxing/unboxing operationscastto suppress warnings relative to cast operationsdep-annto suppress warnings relative to deprecated annotationdeprecationto suppress warnings relative to deprecationfallthrough to suppress warnings relative to missing breaks in switch statementsfinally to suppress warnings relative to finally block that don’t returnhidingto suppress warnings relative to locals that hide variableincomplete-switch to suppress warnings relative to missing entries in a switch statement (enum case)nls to suppress warnings relative to non-nls string literalsnullto suppress warnings relative to null analysisrawtypesto suppress warnings relative to un-specific types when using generics on class paramsrestrictionto suppress warnings relative to usage of discouraged or forbidden referencesserialto suppress warnings relative to missing serialVersionUID field for a serializable classstatic-accesso suppress warnings relative to incorrect static accesssynthetic-access  to suppress warnings relative to unoptimized access from inner classesunchecked to suppress warnings relative to unchecked operationsunqualified-field-accessto suppress warnings relative to field access unqualifiedunusedto suppress warnings relative to unused code

 

0 0
原创粉丝点击