ResolverStyle (Java Platform SE 8 )
Keywords: java.time.format.ResolverStyle class
Date: 2026-06-25

compact1, compact2, compact3
java.time.format

## Enum ResolverStyle

- java.lang.Object
- - java.lang.Enum<ResolverStyle>
  - - java.time.format.ResolverStyle

- All Implemented Interfaces:
    Serializable, Comparable<ResolverStyle>

      public enum ResolverStyle
      extends Enum<ResolverStyle>

  Enumeration of different ways to resolve dates and times.

  Parsing a text string occurs in two phases. Phase 1 is a basic text parse according to the fields added to the builder. Phase 2 resolves the parsed field-value pairs into date and/or time objects. This style is used to control how phase 2, resolving, happens.

  Implementation Requirements:
    This is an immutable and thread-safe enum.
  Since:
    1.8

- - ### Enum Constant Summary

    Enum Constants
    Enum Constant and Description
    `LENIENT` Style to resolve dates and times leniently.
    `SMART` Style to resolve dates and times in a smart, or intelligent, manner.
    `STRICT` Style to resolve dates and times strictly.

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static ResolverStyle` | `valueOf(String name)` Returns the enum constant of this type with the specified name.
    `static ResolverStyle[]` | `values()` Returns an array containing the constants of this enum type, in the order they are declared.

    - ### Methods inherited from class java.lang.Enum

      `clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

    - ### Methods inherited from class java.lang.Object

      `getClass, notify, notifyAll, wait, wait, wait`

- - ### Enum Constant Detail

    - #### STRICT

          public static final ResolverStyle STRICT

      Style to resolve dates and times strictly.

      Using strict resolution will ensure that all parsed values are within the outer range of valid values for the field. Individual fields may be further processed for strictness.

      For example, resolving year-month and day-of-month in the ISO calendar system using strict mode will ensure that the day-of-month is valid for the year-month, rejecting invalid values.

    - #### SMART

          public static final ResolverStyle SMART

      Style to resolve dates and times in a smart, or intelligent, manner.

      Using smart resolution will perform the sensible default for each field, which may be the same as strict, the same as lenient, or a third behavior. Individual fields will interpret this differently.

      For example, resolving year-month and day-of-month in the ISO calendar system using smart mode will ensure that the day-of-month is from 1 to 31, converting any value beyond the last valid day-of-month to be the last valid day-of-month.

    - #### LENIENT

          public static final ResolverStyle LENIENT

      Style to resolve dates and times leniently.

      Using lenient resolution will resolve the values in an appropriate lenient manner. Individual fields will interpret this differently.

      For example, lenient mode allows the month in the ISO calendar system to be outside the range 1 to 12. For example, month 15 is treated as being 3 months after month 12.

  - ### Method Detail

    - #### values

          public static ResolverStyle[] values()

      Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

          for (ResolverStyle c : ResolverStyle.values())
              System.out.println(c);

      Returns:
        an array containing the constants of this enum type, in the order they are declared

    - #### valueOf

          public static ResolverStyle valueOf(String name)

      Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
      Parameters:
        `name` - the name of the enum constant to be returned.
      Returns:
        the enum constant with the specified name
      Throws:
        `IllegalArgumentException` - if this enum type has no constant with the specified name
        `NullPointerException` - if the argument is null

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