Class vs. Classloader getResouceAsStream

In bk.sar -
conf/bkConfigSchema.sql
com.xyz.BkWirelessMgr

For classloader.getResouceAsStream(), all names are absolute, no leading "/". For class.getResourceAsStream(), it has relative and absolute path. But relative means starting from the class's package, i.e., without the leading "/", it will search com.xyz/conf/bkConfigSchema.sql, not found and return null.

Then in BkWirelessMgr class, to load the sql,

getClass().getResourceAsStream("/conf/bkConfigSchema.sql");
getClass().getClassLoader().getResourceAsStream("conf/bkConfigSchema.sql");

Note that "/" is used here instead of File.Separator which doesn't work.