how to change the general JAVA COFFEE CUP icon in JAR file -

I can change the Java Cappy Cup icon in my frame (top, left), but how do I run the jar file Can you change the usual coffee coffee picture? Is it possible to change the file icon of only one jar file? Thx

JAR file does not have any icon This is the operating system that gives it an icon. Can not change the icon of a jar file without changing the jar files icon