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Optional Java
8
Java.util.optional
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1.8
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Interface
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Optional
Nullable Map Example Java
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javaguides.net
Java Optional Class Methods with Examples
Java introduced a new class Optional in JDK 8. It is a public final class and used to deal with NullPointerException in Java application. You must import java.util package to use this class. It provides methods which are used to check the presence of a value for the particular variable.
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