How to pass class from one activity to another

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Mobile

Android

I want to pass the class and content of the class from one activity to another activity.

For example i have two activities activity A and activity B.

i created a class in activity B.

i want to pass this class from activity B back to activity A.


ANOTHER QUESTION IS THAT:

How i can put text loaded from the edittext to the two button.

For example there is a one edittext and two buttons.

i want to load the text from the edittext to the two button but difference text at the same time.
for example i want to set the text button1 to the one button and button2 to the another button and these text loaded from the edit text at the same time