Class CollectionUtils
- java.lang.Object
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- org.fugerit.java.core.lang.helpers.CollectionUtils
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public class CollectionUtils extends Object
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static <T> booleanaddIfNotNull(Collection<T> c, T current)static <T> booleancheckSize(Collection<T> c, int size)Check if a collection is not null and has the given sizestatic <T> booleancontainsOnlyOne(Collection<T> c)Check if a collection is not null and contains exactly one elementstatic <T> voidfill(Collection<T> c, Iterator<T> it)static <T> booleanisEmpty(Collection<T> c)Check if a collection isnullor empty.static <T> Collection<T>merge(Collection<T> merged, Collection<T> toAdd)
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Method Detail
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isEmpty
public static <T> boolean isEmpty(Collection<T> c)
Check if a collection isnullor empty.- Type Parameters:
T- the type- Parameters:
c- the collection- Returns:
trueif the collection is empty or null
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containsOnlyOne
public static <T> boolean containsOnlyOne(Collection<T> c)
Check if a collection is not null and contains exactly one element- Type Parameters:
T- the type- Parameters:
c- the collection- Returns:
trueif the collection is not null and contains only one element
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checkSize
public static <T> boolean checkSize(Collection<T> c, int size)
Check if a collection is not null and has the given size- Type Parameters:
T- the type- Parameters:
c- the collectionsize- size to check- Returns:
trueif the collection is not null and contains only one element
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addIfNotNull
public static <T> boolean addIfNotNull(Collection<T> c, T current)
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merge
public static <T> Collection<T> merge(Collection<T> merged, Collection<T> toAdd)
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fill
public static <T> void fill(Collection<T> c, Iterator<T> it)
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