Use Eclemma to display code coverage

Eclemma provides a good visual view of the code coverage that can be effectively integrated into eclipse.

Plugin Download Address:

http://update.eclemma.org

When the plugin is installed, one more button in the top action bar

The leftmost one can display code coverage:

We can use it to show the coverage of the program's execution.

We click on this button and then select an application to run:

Here you can see that the code is labeled with three colors: yellow, green, and red.

The yellow expression is partly performed, the red expression is not carried out, the green expression was carried out.

So at the bottom of the coverage view, there is a summary of the information:

Shows the rate at which all the relevant code is being executed.

This tool can also be combined with unit testing.