database - Command for granting Access on MySQL -

what command granting access mysql database new users want connect?

consider statement:

create user 'java'@'localhost' identified 'password'; grant on javabase.* 'java'@'localhost' identified 'password'; 

here localhost able connect database. can write '*' instead of 'localhost'?

grant on javabase.* 'java'@'%' identified 'password'; work hosts