difference between port 80 and 8080 code example

Example 1: how to check what is running in port 8080

netstat -a -n -o | find "8080

Example 2: how to port number of 8080 in macos

$ lsof -i :8080 | grep LISTEN

java    42975 mkyong   57u  IPv6 0xf10ca37d995a077f      0t0  TCP *:http-alt (LISTEN)