Here is what IDEA generated for me: ``` class A { ...

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[cedric]

Here is what IDEA generated for me:

class A {
  private Integer a;

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    A a1 = (A) o;

    return a != null ? a.equals(a1.a) : a1.a == null;

  }

  @Override
  public int hashCode() {
    return a != null ? a.hashCode() : 0;
  }
}