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HashMap is an implementation of Map. All optional operations are supported.All
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TimeZone represents a time zone offset, and also figures out daylight savings.
Typically, you get a
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A java.util.Queue that additionally supports operations that wait for the queue
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A Java virtual machine.
A VirtualMachine represents a Java virtual machine to which this Java vir
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The GridBagLayout class is a flexible layout manager that aligns components
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