双击jar时，java输出流会怎样？

Question

I have a java application with a swing UI. It also outputs to the console using System.out.println. My question is what happens to the output when the jar file is double clicked. Is it stored in the java VM memory and does it take up resources? or is it discarded and not stored anywhere?

Answer 1

There is no console attached when you double click on the jar. So System.out.println will go nowhere. Instead use a logging framework.