Java - setFloat()

I want to store the RATE into table PO_HEADER. But the table just store the value 123.123.. Why it cannot store 123.123456?
Please help me! Thank you!

Table PO_HEADER: // Using Oracel 8i
NUMBER(10,6) //size=10 ; scale=6

float zz=(float)123.123456;
pstmt=con.prepareStatement("insert into PO_HEADER (RATE) values (?)"); pstmt.setFloat(1,zz);
pstmt.executeUpdate(); Received on Wed Oct 31 2001 - 01:23:46 CST