Four common ways and usage analysis of traversing map collection in Java

This article describes four common ways and usages of traversing map collection in Java. Share with you for your reference, as follows:

~Map sets store values in the form of key value pairs, so traversing map sets is nothing more than obtaining keys and values, and obtaining keys and values according to actual needs

1. Nothing more than through map Keyset () gets the value, and then gets the value according to the key

2. Through map Get entry (string, string), and then use entry Getkey() gets the key through entry Getvalue() get value

3. The iterator is also used to obtain the entry, so you can understand its usage and master it well

4. Some common knowledge points of map and the deformation form of values need to be mastered and understood

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