Quoting from project coin proposal at the following URL:

http://mail.openjdk.java.net/pipermail/coin-dev/2009-March/000316.html

"When a programmer tries to invoke a varargs (variable
arity) method with a non-reifiable varargs type, the compiler currently
generates an "unsafe operation" warning. This proposal moves the warning
from the call site to the method declaration."

BEFORE:

  static <T> List<T> asList(T... elements) { ... }

  static List<Callable<String>> stringFactories() {
    Callable<String> a, b, c;
    ...
    // Warning: "uses unchecked or unsafe operations"
    return asList(a, b, c);
  }

AFTER (1):

  // Warning: "enables unsafe generic array creation"
  static <T> List<T> asList(T... elements) { ... }

  static List<Callable<String>> stringFactories() {
    Callable<String> a, b, c;
    ...
    // Warning: "uses unchecked or unsafe operations"
    return asList(a, b, c);
  }

AFTER (2):

  @SuppressWarnings("generic-varargs")
  static <T> List<T> asList(T... elements) { ... } //no warning

  static List<Callable<String>> stringFactories() {
    Callable<String> a, b, c;
    ...
    // no warning
    return asList(a, b, c);
  }