Get enum by its inner field

Question

Have enum with inner fields, kind of map.

Now I need to get enum by its inner field.

Wrote this:

package test;

/**
 * Test enum to test enum         


        

Answer 1

Here is the most convenient way to find enum value by its field:

public enum TestEnum {

  A("EXAMPLE_1", "Qwerty", 1),
  B("EXAMPLE_2", "Asdfgh", 2),
  C("EXAMPLE_3", "Zxcvbn", 3);

  private final String code;
  private final String name;
  private final Integer typeID;

  TestEnum(String code, String name, Integer typeID) {
    this.code = code;
    this.name = name;
    this.key = typeID;
  }

  public String getCode() {
    return code;
  }

  public String getName() {
    return name;
  }

  public Integer getKey() {
    return key;
  }

  public static TestEnum findValueByTypeId(Integer key) {
    return Arrays.stream(TestEnum.values()).filter(v ->
        v.getKey().equals(key)).findFirst().orElseThrow(() ->
        new Exception(String.format("Unknown TestEnum.key: '%s'", key)));
  }
}