How to change file type in windows 10

Hi,

I need to change the file type txt to csv but I can't do that.

For eg, test.txt --> test.csv but it remain test.csv.txt


I found out simple setting to do that.

 Click this box in view option.


It will work now.

How to compile the java class file without external software or using Eclipse

Use this plugin from the marketplace.

You can compile your class file