Java @SuppressWarnings Example

@SuppressWarnings

@SuppressWarnings annotation tells the compiler to suppress specific warnings that it would otherwise generate. In the following example, a deprecated method is used, and the compiler usually generates a warning. In this case, however, the annotation causes the warning to be suppressed.

   // use a deprecated method and tell
   // compiler not to generate a warning
   @SuppressWarnings("deprecation")
    void useDeprecatedMethod() {
        // deprecation warning
        // - suppressed
        objectOne.deprecatedMethod();
    }
Every compiler warning belongs to a category. The Java Language Specification lists two categories: deprecation and unchecked. The unchecked warning can occur when interfacing with legacy code written before the advent of generics. To suppress multiple categories of warnings, use the following syntax:

@SuppressWarnings({"unchecked", "deprecation"})