Menu File –> Import –> Maven –> Existing Maven Projects
Browse to your source code location
Click Finish button to finish the importing
Open the GsonTest.java and JacksonTest.java
Right click -> Run As -> Java Application or use the shortcut: Alt+Shift+x, t to start the JUnit test methods.
Source code are described in Convert Java Objects To JSON And Vice Versa With Jackson and Gson
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