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java.util.function package

 
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Java 8 supports the "->" lambda operator. To use lambda operator we need to make sure that the interface is of SAM type. That is Single Abstract Method for example Comparator<T>, Comparable<T>, Runnable, etc.
Read about all such interfaces added in java 8 under java.util.function package.
Read about it here http://data-structure-learning.blogspot.com/p/javautilfunction-package.html
 
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