How does one accomplish equivalent of running following line on command line in IntelliJ or Eclipse .... :
java MyJava < SomeTextFile.txt
I've attempted to provide location of the file in Program Arguments field of Run/Debug Configuration in IntelliJ
You can't do this directly in Intellij but I'm working on a plugin which allows a file to be redirected to stdin. For details see my answer to a similar question here [1] or give the plugin a try [2].
[1] Simulate input from stdin when running a program in intellij
[2] https://github.com/raymi/opcplugin
You can use BufferedReader for this purpose to read from system input:
As @Maba said we can not use Input redirection operator (any redirection operator) in eclipse/intellij as there no shell but you can simulate the input reading from a file through stdin like the below