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Comparing two Dates

 
sinasi susam
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I read a Date from db,
and now i need another java.sql.Date object,so that i can compare two Dates.

java.sql.Date my=new Date(2010,12,12);

I used this one .However when i printed it with System.out.println(),

it says;

3911-01-12

???

I could not understand that.Before i compile it i get a warning of deprecation.

1. question for me is

How to create a Date manually?

2. is how to compare them?

I saw the compareTo(Date) method that it returns an int.

i could not see any static int type in java.sql.Date.So what kind of values can take it?
How can i know which Date is bigger to another?
 
praveen kanakarajan
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the constructor you are using is a deprecated onethe value it adds the year with 1900.im just pasting the details in the java api dcoumentation refernce here

public Date(int year,
int month,
int date)
Deprecated. As of JDK version 1.1, replaced by Calendar.set(year + 1900, month, date) or GregorianCalendar(year + 1900, month, date).

Allocates a Date object and initializes it so that it represents midnight, local time, at the beginning of the day specified by the year, month, and date arguments.

Parameters:
year - the year minus 1900.
month - the month between 0-11.
date - the day of the month between 1-31.

abt the questions

1)
you can use Calendar instead of the Date

2)

abt the comparison

if <0 the date is smaller
if =0 the date is equal
if >0 the date is greater

[ August 04, 2005: Message edited by: praveen k ]
[ August 04, 2005: Message edited by: praveen k ]
 
Bear Bibeault
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"praveen k",

There aren't many rules that you need to worry about here on the Ranch, but one that we take very seriously regards the use of proper names. Please take a look at the JavaRanch Naming Policy and adjust your display name to match it.

In particular, your display name must be a first and a last name separated by a space character, and must not be obviously fictitious.

Thanks!
bear
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Kuldeep Vaishnav
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to generate sql date use


import java.sql.Date;
.............
.............
Date date = Date.valueOf("yyyy-mm-dd");


comparison as per Praveen K.
 
sinasi susam
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Hello again,

i wanted to call a stored procedure.In my procedure there is an "in" parameter as Date,

Problem is i am setting date with setDate method of CallableStatement but it doesnt work.

And then i try another procedure there is not Date in it,what i see?It works!

How fool?

I get Date as said above Date.valuOf("2005-07-08") and set it.
But it doesnt work!

I did not understand what it is...
 
sinasi susam
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In fact it works a bit, but it doesnt return values as i expected.Because if i do the same thing from sql plus i get different results.

Whats going on?I did not understand.
 
Kuldeep Vaishnav
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make sure when you are defining you are defining sql date and not util date.Sometimes great minds forget to import java.sql.Date and define util date in turn...
 
Kuldeep Vaishnav
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can you post your code please.Might provide better insight.Thanks.
 
sinasi susam
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Sure,Here is procedure's structure

PROCEDURE HOLIDAY_CONTROL_DB(xcompany IN NUMBER, xdate IN DATE,
ERRORNO IN OUT NUMBER,ERROR IN OUT VARCHAR2,RAISE IN OUT NUMBER)

Here is my code to call it;


thx.
[ August 09, 2005: Message edited by: sinasi susam ]
 
Kuldeep Vaishnav
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AFAIK :

for interface CallableStatement

setDate(String parameterName,java.sql.Date date)
setDate(String parameterName,java.sql.Date date,Calendar cal)

are defined but nothing like

setDate(int parameterIndex,java.sql.Date date).

So guess try changing it to one of the two above said or use PreparedStatement to use parameterIndex...

Lemme know.....
[ August 09, 2005: Message edited by: Kuldeep Vaishnav ]
 
Kuldeep Vaishnav
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aahh...dumb me..callable extends prepared.....
 
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