CloneReturnsClassType.java

import org.jetbrains.annotations.NotNull;

class CloneReturnsClassType implements Cloneable {
  @NotNull
  @Override
  public CloneReturnsClassType clone() throws CloneNotSupportedException {
    return (CloneReturnsClassType)super.clone();
  }
}
class One { // no warning because not Cloneable
  @NotNull
  @Override
  protected Object clone() throws CloneNotSupportedException {
    return super.clone();
  }
}
class Two implements Cloneable {
  @NotNull
  @Override
  protected <warning descr="'clone()' should have return type 'Two'">Object</warning> clone() throws CloneNotSupportedException {
    return super.clone();
  }
}
class Three {
  @NotNull
  @Override
  protected <warning descr="'clone()' should have return type 'Three'">String</warning> clone() throws CloneNotSupportedException { // evil is reported even if not Cloneable
    return "super.clone()";
  }
}