Introduction - If you have any usage issues, please Google them yourself
* Containers* Note to master the contents of** the following graph:* set-HashSet TreeSet object loaded and no order should not equals string comparison* Collection | the use of an array list | fitted inside one by one* list-LinkedList, ArrayList loaded into the object can have the order equals comparison** Map-HashMap TreeSet- two inside two loaded*- defines the key value key value mapping for the method* Iterator--- iteration of collection iterators, equivalent to pointer
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rongqi\utiljava.java
rongqi\utiljava1.java
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