Compare time (time difference in java)

[Guy Belpa]

Hey All,


i'm developing a website using Java..
for a specific page i want to limit access to that page by TIME of the day..
simply i want to give a error massgae after 6pm if user try to access that page..
so i want to check isCurrentTimeBefore 6 pm...

code i tried is...

java.sql.Time time = new Time(System.currentTimeMillis());
System.out.println("\nisBefore6() currentTimeMillis\n"+time);


java.sql.Time time0 = new Time(06,00,00);
System.out.println("\ntime0=\n"+time0.getTime());



System.out.println("\ncompare "+time2.before(time));

but it is NOT working for my requirement..
Any help will be appriciated.
Thanks in advance.

[Jesper de Jong]

Why are you using class java.sql.Time for this? Use class java.util.Date or java.util.Calendar instead. For example:

// Get calendar set to the current date and time
Calendar cal = Calendar.getInstance();

// Set time of calendar to 18:00
cal.set(Calendar.HOUR_OF_DAY, 18);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);

// Check if current time is after 18:00 today
boolean afterSix = Calendar.getInstance().after(cal);

if (afterSix) {
    System.out.println("Go home, it's after 6 PM!");
}
else {
    System.out.println("Hello!");
}

[Guy Belpa]

thanks for quick reply... thanku very much , sir.
i will try it...

just few minitues b4 i tried below ...

        java.sql.Time time = new Time(System.currentTimeMillis());

        String cur_timeS = time.toString();

        System.out.println("cur_timeS = " + cur_timeS);
        cur_timeS = cur_timeS.replaceAll(":", "");
        System.out.println("cur_timeS = " + cur_timeS);

        long cur_timeL = Long.parseLong(cur_timeS);
        long endTime = 180000;
        if (cur_timeL < endTime) {
            System.out.println("beforrrrrrrr = " );
        } else {
            System.out.println("afterrrrrrrrrr " );
        }

i understand it is NOT a proper way for doing it..
It seems your suggestion is much better if it works!

[Campbell Ritchie]

Don't write abbreviations like "b4". Read this FAQ.

[Guy Belpa]

Helo Gurus,

caN anyone of you expert go through both code snaps suggested here can
suggest the better one?

Thank in advance!

[Campbell Ritchie]

You will save object creation time if you use the time methods of the System class Note I said time methods; I know of two, so you should consider carefully which is more appropriate for your purposes.

[Jesper de Jong]

Guy Belpa wrote:
java.sql.Time time0 = new Time(06,00,00);

One more thing: Don't prefix integer literals in your source code with a 0 (like 06, 00, 00 in your source code).

Integer literals that are prefixed with a 0 are interpreted by the Java compiler as octal contants, not decimal constants. Try this, you'll see you'll get a compiler error:

java.sql.Time time0 = new Time(08, 00, 00);

Do you understand why that will give you a compiler error?

[Guy Belpa]

Dear experts,

Can you go through both code snaps and suggest the better one?

Thank in advance!

Jesper Young wrote:

// Get calendar set to the current date and time
Calendar cal = Calendar.getInstance();

// Set time of calendar to 18:00
cal.set(Calendar.HOUR_OF_DAY, 18);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);

// Check if current time is after 18:00 today
boolean afterSix = Calendar.getInstance().after(cal);

if (afterSix) {
    System.out.println("Go home, it's after 6 PM!");
}
else {
    System.out.println("Hello!");
}

Vs.

        java.sql.Time time = new Time(System.currentTimeMillis());

        String cur_timeS = time.toString();

        System.out.println("cur_timeS = " + cur_timeS);
        cur_timeS = cur_timeS.replaceAll(":", "");
        System.out.println("cur_timeS = " + cur_timeS);

        long cur_timeL = Long.parseLong(cur_timeS);
        long endTime = 180000;
        if (cur_timeL < endTime) {
            System.out.println("beforeee rrrrrrrrrr " );
        } else {
            System.out.println("Go home, it's after 6 PM!");
        }