tJava vs tJavaRow vs tJavaFlex

tJava	tJavaRow	tJavaFlex
We can integrate custom Java code	Use component to integrate your custom Java code	Use component to integrate your custom Java code
It will be executed first but only once in the subjob.	It will be executed for each row in the subjob.
It doesnot requires Input Flow	It requires Input Flow	It doesnot requires Input Flow
It does not requires output Flow	If output Schema Defined	If output Schema Defined
It can be used as Start of the Job	It can not be used as Start of the Job	It can be used as Start of the Job
It can be used as a separate subjob	It cannot be used as a separate subjob	It can be used as a separate subjob
It accepts Main Flow and Iterator Flow	It accepts only Main Flow	It accepts Main Flow and Iterator Flow
It has only the main part of the code	It has only the main part of the code	It has three Java code parts (start, main, end)
It will not Auto propagate Data	It will not Auto propagate Data	It will Auto propagate Data
It applies exclusively to the start part of the generated code of the subjob.	The tJavaRow code applies to each and every row of the data getting processed.	The tJavaFlex has three Java code parts (start, main, end) that enable you to enter personalized code for different purposes
Common use of tJava include setting global or context variables prior to the main data processing stages and printing logging messages.It is udes to display status message and variables.	The tJavaRow component is used as an intermediate component and you are able to access the input flow and transform the data.	It allows the execution of arbitrary Java code, and bridges the functionality of tJava and tJavaRow.
It will be executed first but only once in the subjob.	The Java code inserted through the tJavaRow will be executed for each row.	The Start code is executed prior to any rows being processed, so it is used to initialize the variables.The start part will be executed first but only once in the subjob.