Java Data Type - 如何比较枚举成员：==或equals()

enum TestEnum {
  ONE, TWO, THREE
}
public class Main {
  public static void main(String[] args) {
    for (int y = 0; y < 5; ++y) {
      for (int x = 0; x < Integer.MAX_VALUE; ++x) {
        if (TestEnum.ONE.equals(TestEnum.TWO)) {
          System.out.println("equals");
        }
        if (TestEnum.ONE == TestEnum.TWO) {
          System.out.println("==");
        }
      }
    }
  }

}