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I have a map, I am wondering if there is a way to get some submap according to some condition. Any useful library?
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To retrieve the set of keys from HashMap, use the keyset() method. However, for set of values, use the values() method.
Method 1: Print Map in Java Using for-each Loop Within the for-each loop, you can use Map's getValue() and getKey() methods to iterate over key-value pairs. This is the most systematic way to print a map and should be used if it is required to print both map keys and values.
Create a submap by using the Graphical Data Mapping editor. Create a submap by defining a Submap transform between an input object and an output object in a message map. Use the Graphical Data Mapping editor to convert a local map into a submap by using the Refactor to submap function.
In Guava the Maps class contains three different filtering methods, depending on whether you want to filter by key, value, or both.
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