I have 3 tables . the tables are connected with Foreign keys

I want to delete some records but as they are interconnected by foreign keys i have to delete all of the dependencies.

how to do...

Hello,
I am using a Jtable in my application.I am entering values in last column of that table.Below the table, i have a Jbutton named as 'Save'.Suppose while clicking on 'Save', the entire...

hello,
I am using byte array to store values in it & then i am storing that
byte array into database using


st.setBytes(1,myBytearray);



while retreiving values it works fine if...

yes.. but the problem is where should I perform this check,so that I can immediately inform user abt constraint violation.

Hello,
I want to check uniqueness of id at the time of entry only.And I want to give message to the user at that time only.How to do this?

Hi!!
I have created JTable with fixed no of rows and columns.Then depending upon some conditions I want to hide one column,but the methods removeColumn or setting maxWidth to 0 are not working.I...

stm =con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
rs=stm.executeQuery(qry);
rs.last();
String s=rs.getString(1);



I have backend as sybase.
But...

I want to connect to sybase from java using jdbc:odbc bridge..
Which driver should I use like I have used "ODBC for Oracle"
Plz help..

We want to write byte array to a file.The code given below works correctly for only one byte array.When we try to write more than one byte array,the previous byte array gets overwritten.
How can we...

We have 3 classes.In first class,we have a content pane and we have created object of second class on it.In second class,we have
added a few textfields.We want that all these textfields of second...

I have byte array that contains (49 50 58 57 57).
I'm storing this byte array in blob by using setBytes() method of
preparedStatement.
But in database,it is stored in different manner...

In following code ,I have initialized column to empty blob. But when I try to retrieve the blob,i get an exception.Can anybody help me out??
_____________________________________________________
...

how could I instantiate blob object.

Hi!!

I want to insert byte array in database schema as follows:
table message
{
msgid number(5),
messagevalue BLOB
};

I have done this in following way...

Actually I want 2 convert it into integer manually.

I have a byte array has follows:

0 6 -56 28

How can I get its integer value by doing a manual calculation?

Hello!!
I have a ByteBuffer & I want to send it on tcp or udp connection.
How can I do this?

Thank you very much!!!

Can anyone give me code for conversion of IEEE-754 representation of binary float to decimal number?

I have IEEE754 representation of real number 2.5 as follows:
01000000001000000000000000000000

How can I retrieve 2.5 back from this representation?

actually I mean binary(IEEE754 format) representation of real number.

how to convert binary float to decimal float?

I have a string as follows:

'mnp1011000jie'

I want to retrieve contents of the string as follows:
1st field: mnp
2nd field: 101 (which signifies the binary representation of 5)
3rd field:...

Thank you very much...

What we have tried is as follows:

String binary=Integer.toBinaryString(Float.toRawIntBits(1.1));

How can i convert float or double to binary?

i have stored binary representation of some value in above string.
In above example i want to retrieve specifically "01010111".

Suppose i have a string which contains some binary data as follows:

"bac01010111pqr14 "

how can i retrieve binary data from this string using java?

i have tried to import "nio" package in my program but it is giving error as follows:

chk.java:2: package java.nio does not exist
import java.nio.*;
^
1 error


I am using jdk1.4.2 edition?...

We want to compose message as follow.
for example...

symbol : 5 bytes : alphanumeric
action : 1 byte : alphanumeric
time : 7 bytes : alphanumeric
mc id : 1 bytes : alphanumeric
prize : 10...

i want to write a code for big endian and little endian represntation of message.The msg is trading message.How can i do it with core java?

also how can i check data type validity of input given...

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Actually for r project, we need to store fields having data type as ASCII characters and we are not getting how to do it?

Does SQL support ASCII data type?Or we need to do some type casting for it.?

Hi!! We are planning to do r project in c++.
Is there any good library available for creating GUI in c++?