Visual programming for Java?

Question

Java

Dear experts,
A few questions:
1. Is there a simple, effective tool for visual programming in Java?
2. How effective are such tools in general - is it possible with their help to:
a. create a normal working program;
b. download someone else's code and see its blocks, the relationship between them.

Answer 1

- Dad, does visual programming exist ?
- No, son, it's fantastic.

If the corresponding Russian Wikipedia article says otherwise, then pay attention to the hung dies:
In fact, this means that the subject of the article is another Great Mystery of Water.
And the corresponding article in the English wiki uses THIS as the main illustration, which clearly characterizes the age group of the target audience of "Visual Programming":