Initializing help system before first use

# MapKey4

- java.lang.Object
- - com.dashoptimization.maps.MapKey4<K1,​K2,​K3,​K4>

- Direct Known Subclasses:
    `ComparableMapKey4`

      public class MapKey4<K1,​K2,​K3,​K4>
      extends java.lang.Object

  A key in a 4-dimensional map. Instances of this class represent a tuple with 4 elements that can be used as key in instances of `HashMap4`.
  Since:
    43.00

- - ### Constructor Summary

    Constructor | Description
    --- | ---
    `MapKey4​(K1 key1, K2 key2, K3 key3, K4 key4)` | Create a new 4-dimensional key from the given keys.

  - ### Method Summary

    Modifier and Type | Method | Description
    --- | --- | ---
    `boolean` | `equals​(java.lang.Object other)`
    `K1` | `getKey1()` | Get key number 1.
    `K2` | `getKey2()` | Get key number 2.
    `K3` | `getKey3()` | Get key number 3.
    `K4` | `getKey4()` | Get key number 4.
    `int` | `hashCode()`

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

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

- - ### Constructor Detail

    - #### MapKey4

          public MapKey4​(K1 key1,
                         K2 key2,
                         K3 key3,
                         K4 key4)

      Create a new 4-dimensional key from the given keys.
      Since:
        43.00

  - ### Method Detail

    - #### getKey1

          public final K1 getKey1()

      Get key number 1.
      Returns:
        Key number 1.
      Since:
        43.00

    - #### getKey2

          public final K2 getKey2()

      Get key number 2.
      Returns:
        Key number 2.
      Since:
        43.00

    - #### getKey3

          public final K3 getKey3()

      Get key number 3.
      Returns:
        Key number 3.
      Since:
        43.00

    - #### getKey4

          public final K4 getKey4()

      Get key number 4.
      Returns:
        Key number 4.
      Since:
        43.00

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `java.lang.Object`

    - #### equals

          public boolean equals​(java.lang.Object other)

      Overrides:
        `equals` in class `java.lang.Object`

Parent Topic Class Summary

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