Lookup Java enum by string value

Say I have an enum which is just

public enum Blah {
    A, B, C, D
}

and I would like to find the enum value of a string, for example "A" which would be Blah.A . How would it be possible to do this?

Is the Enum.valueOf() the method I need? If so, how would I use this?

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Yes, Blah.valueOf("A") will give you Blah.A .

Note that the name must be an exact match, including case: Blah.valueOf("a") and Blah.valueOf("A ") both throw an IllegalArgumentException .

The static methods valueOf() and values() are created at compile time and do not appear in source code. They do appear in Javadoc, though; for example, Dialog.ModalityType shows both methods.

---

如果文本与枚举值不相同，则为另一种解决方案：

public enum Blah {
  A("text1"),
  B("text2"),
  C("text3"),
  D("text4");

  private String text;

  Blah(String text) {
    this.text = text;
  }

  public String getText() {
    return this.text;
  }

  public static Blah fromString(String text) {
    for (Blah b : Blah.values()) {
      if (b.text.equalsIgnoreCase(text)) {
        return b;
      }
    }
    return null;
  }
}

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