---
title: Validated Collections
---
Fzzy Config has validation for lists, maps, and sets. Each of these has intricacies that are more thoroughly explained in the documentation:
[Validated Collections 🗗](https://fzzyhmstrs.github.io/fconfig/-fzzy%20-config/me.fzzyhmstrs.fzzy_config.validation.collection/index.html)
Validated collections implement their respective collection type (list, set, map), so can be used directly as such instead of having to .get() the wrapped collection first.
### Validation Conversion
Any `ValidatedField` can be converted into a list or set using the `toList()` and `toSet()` methods, respectively. In addition, collections can be converted to [ValidatedChoice](Choices) using their `toChoices()` method. The `ValidatedField` is backing validation for the resulting collection.
```java !!tabs Java
//wraps the vararg valued provided with a blank validated field (identifiers in this case). validation with actual bounds and logic can of course be used too
public ValidatedList listFromField = new ValidatedIdentifier().toList(Identifier.of("stick"), Identifier.of("blaze_rod"));
```
```kotlin !!tabs Kotlin
//wraps the vararg valued provided with a blank validated field (identifiers in this case). validation with actual bounds and logic can of course be used too
var listFromField = ValidatedIdentifier().toList(Identifier.of("stick"), Identifier.of("blaze_rod"))
```
### Static Initializers
`ValidatedList` and Set have static methods that initialize collections of common types, much like java `List.of()` or kotlin `listOf()`.
```java !!tabs Java
public ValidatedList validatedIntList = ValidatedList.ofInt(1, 2, 5, 10);
public ValidatedSet validatedIntSet = ValidatedSet.ofInt(1, 2, 5, 10);
```
```kotlin !!tabs Kotlin
var validatedIntList = ValidatedList.ofInt(1, 2, 5, 10)
var validatedIntSet = ValidatedSet.ofInt(1, 2, 5, 10)
```
### Map Builders
Validated Maps have builders for simple creation. These builders are "staged", walking you through each stage needed to build it, so are technically pseudo-builders.
```java !!tabs Java
public ValidatedMap myMap = (new ValidatedMap.Builder())
.keyHandler(new ValidatedInt(2, 100, 0)) //first comes the key handler. The default value for this will be the initial value stored in the key when a new entry is added.
.valueHandler(new ValidatedBoolean()) //next the value handler.
.defaults(Map.of(5, true, 10, false, 15, true)) //default map values can be set a variety of ways
.build(); //build!
```
```kotlin !!tabs Kotlin
var myMap: ValidatedMap = ValidatedMap.Builder()
.keyHandler(ValidatedInt(2, 100, 0)) //first comes the key handler. The default value for this will be the initial value stored in the key when a new entry is added.
.valueHandler(ValidatedBoolean()) //next the value handler.
.defaults(mapOf(5 to true, 10 to false, 15 to true)) //default map values can be set a variety of ways
.build() //build!
```
See the documentation pages for List 🗗, Set 🗗, Map 🗗, Enum Map 🗗, Identifier Map 🗗, String Map 🗗