empty string is NULL in Oracle Database

Let's say you have a string t, and want to insert into 

an oracle database, and want to find the row later. 

Sure, let's do this:

insert into table_a (status) values(?)

select * from table_a where status = ?

In java, it's pretty simple, right? 

Just use prepared statement, 

ps.setString(1,t)

And when read, also

ps.setString(1,t)

Everything works normal, unless t="".

When t is an empty string, no rows found!!!

Actually, in Oracle database, there is no zero-length string. Any zero-length string, either from a function call or the literal '', is treated as null. 

This is an atrocious Oracle Database behavior!