// 忽略全部类型的警告 @SuppressWarnings("all") // 忽略未检查的转化，例如集合没有指定类型的警告 @SuppressWarnings("unchecked") // 忽略未使用的变量的警告 @SuppressWarnings("unused") // 忽略与使用Closeable类型资源相关的警告 @SuppressWarnings("resource") // 忽略在类路径，原文件路径中有不存在的路径的警告 @SuppressWarnings("path") // 忽略使用了某些不赞成使用的类和方法的警告 @SuppressWarnings("deprecation") // 忽略switch语句执行到底没有break关键字的警告 @SuppressWarnings("fallthrough") // 忽略某类实现Serializable，但是没有定义serialVersionUID的警告 @SuppressWarnings("serial") // 忽略没有传递带有泛型的参数的警告 @SuppressWarnings("rawtypes") 源码
package java.lang; import java.lang.annotation.*; import static java.lang.annotation.ElementType.*; / * Indicates that the named compiler warnings should be suppressed in the * annotated element (and in all program elements contained in the annotated * element). Note that the set of warnings suppressed in a given element is * a superset of the warnings suppressed in all containing elements. For * example, if you annotate a class to suppress one warning and annotate a * method to suppress another, both warnings will be suppressed in the method. * * As a matter of style, programmers should always use this annotation * on the most deeply nested element where it is effective. If you want to * suppress a warning in a particular method, you should annotate that * method rather than its class. * * @author Josh Bloch * @since 1.5 * @jls 4.8 Raw Types * @jls 4.12.2 Variables of Reference Type * @jls 5.1.9 Unchecked Conversion * @jls 5.5.2 Checked Casts and Unchecked Casts * @jls 9.6.3.5 @SuppressWarnings */ @Target({TYPE, FIELD, METHOD, PARAMETER, CONSTRUCTOR, LOCAL_VARIABLE}) @Retention(RetentionPolicy.SOURCE) public @interface SuppressWarnings { / * The set of warnings that are to be suppressed by the compiler in the * annotated element. Duplicate names are permitted. The second and * successive occurrences of a name are ignored. The presence of * unrecognized warning names is not an error: Compilers must * ignore any warning names they do not recognize. They are, however, * free to emit a warning if an annotation contains an unrecognized * warning name. * *
The string {@code "unchecked"} is used to suppress * unchecked warnings. Compiler vendors should document the * additional warning names they support in conjunction with this * annotation type. They are encouraged to cooperate to ensure * that the same names work across multiple compilers. * @return the set of warnings to be suppressed */ String[] value(); }
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