java.net.BindException: Permission denied

在运行serverSocket = new ServerSocket(port);
却报出：java.net.BindException: Permission denied错误，在网上看到一段话，解决自己的疑问
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In UNIX environments port numbers below 1024 are reserved and can be bound or used only by root (superuser). So if the non-root users try to run the application they will receive an error message saying that
"java.net.BindException: Permission Denied"
There are two ways to avoid this exception. One way is to login as root and run the program. The other way is to specify a port greater than 1023