I would suggest to use better name: like selectVariable

fixed

please also update the javadoc after changing variable names

done

Can you please also add methods for selecting variables in EnvironmentTab? you have method getAllVariables, but how do I select one variable by name in this tab? Can you please also change name of current methods select(...) to selectEnvironmentVariable?

done

Overwriting value should be disabled by default

fixed

I think that overwriting the value should be default choice but the option not to override is also implemented in api. I can imagine that user would like to add the intended value no matter there already exists one as he should know what he wants. Instead of not passing it be default which would require a debugging session to find out why the env is not set, imho.

you can call edit(String variableName,String variableName,String newValue) or you can put null instead of second parameter and change edit(String variableName, String newName, String newValue) accordingly(if newName is null, do not change Name text)

fixed

You can instead of basically rewriting the method that follows with boolean params, simply call the later implementation with default boolean value. And I would go with default overwrite = true instead of false...

done

It would be nice to have this similarities in implementation write only once. Like maybe using functional interface to pass specific code into repeated passages? Ie:

	public void versionOne(String param) {
		versionImpl(() -> {
			System.out.println("I am String!");
		});
	}
	
	public void versionTwo(int param) {
		versionImpl(() -> {
			System.out.println("I am int!");
		});
	}
	
	private void versionImpl(Runnable mySpecificImpl) {
		System.out.println("Actions before my functional interface call");
		mySpecificImpl.run();
		System.out.println("Actions after my functional interface call");
	}

done