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Java HashMap Examples

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Java HashMap examples including creating a hashMap, clearing a HashMap, add an entry, remove an entry, loop through a hashMap and more.

Java HashMap vs HashTable

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Java HashMap vs HashTable including thread safety, null key values, and performance comparison.

Java HashMap Implementation

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The Java HashMap implementation including hashing, calculating the index, how HashMap works internally, performance and step by step.

Java HashMap

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The Java HashMap including what is a HashMap, when you should use a HashMap, the Java HashMap implementation, examples and HashMap vs HashTable

equals() and hashCode() in Java

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equals and hashCode in Java including the difference between equals() and hashCode(), why you need to override equals() and hashCode(), and examples of each.

Java Serialization in Depth

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Java serialization in depth including what is serialization, why we need serialization in Java, how it works, the serializable interface, problems with serialization and examples.