Converting from String to Date data type

[biosphere]

hi, can somebody give me some idea of how to convert a string data type to a date data type... thanks for the help given...

biosphere

[dlorde]

Use the parse(...) (http://java.sun.com/j2se/1.4/docs/api/java/text/SimpleDateFormat.html#parse(java.lang.String,%20java.text.ParsePosition)) method of the java.text.SimpleDateFormat (http://java.sun.com/j2se/1.4/docs/api/java/text/SimpleDateFormat.html) class.

[biosphere]

hi dlorde,

thanks for the idea given earlier, anyway, can i know more about this ...parse(...) method, earlier i've try to used this parse method, but i found out this method is used together with the throw exeption which mean have to put into one function. (is this true?, correct me if i'm wrong) however, i wonder is there any other way, to convert a string data type to a date data type, or use that parse(...) method, in a direct manner, which mean make it work without a function... and byt the way, i am applying this date conversion in the web-based JSP... thanks again for the info given earlier...

biosphere

[dlorde]

biosphere - if you don't know how to use exceptions you won't get very far. Exceptions are fundamental to Java - I recommend the Java Tutorial (http://java.sun.com/docs/books/tutorial/) (exceptions (http://java.sun.com/docs/books/tutorial/essential/exceptions/)) and Bruce Eckel's online Java book 'Thinking in Java (http://www.codeguru.com/java/tij/tij_c.shtml)'.

The SimpleDateFormat.parse(...) method can be used like this:try {
String format = "MM/dd/yyyy"; // Use your own format here
// Make a date formatter
DateFormat df = new SimpleDateFormat(format);
// Convert the string to a date
Date theDate = df.parse(inputDateString);
... do something with the date
}
catch(ParseException pe) {
// do whatever is needed when the inputDateString doesn't
// match the required format.
}That's just one way of handling it, there are many variations on the theme.

If you are writing JSP, it is generally recommended that you don't put raw Java (scriptlets) into the JSP code, but you should use JSP Custom Tags to call your Java code. This implies that the date conversion code should go into a method that will be called from a custom tag.

[elizas]

Below are some examples of conversion from one data type to another in java.

double to String :
String str = Double.toString(i);

long to String :
String str = Long.toString(l);

float to String :
String str = Float.tString(f);

String to integer : str = "25";
int i = Integer.valueOf(str).intValue();
or
int i = Integer.parseInt(str);

String to double :
Double d = Double.valueOf(str).doubleValue();

String to long:
long l = Long.valueOf(str).longValue();
or
Long L = Long.parseLong(str);

String to float :
Float f = Float.valueOf(str).floatValue();

decimal to binary : int i = 42;
String bin = Integer.toBinaryString(i);

http://www.mindfiresolutions.com/Converting-datatype-in-Java-46.php

[keang]

:confused: Why post a list of conversions on an 8 year old post that was already answered and when your post doesn't even answer the original question.

BTW the example "String to double :" is assigning the returned double to a Double. And there's no exception handling - when converting from String objects to numeric types you should catch and handle NumberFormatException.

[dlorde]

elizas - it is against the forum rules to advertise, and advertising your site is the only reasonable explanation for your post.

They know enough who know how to learn...
J. Adams

[keang]

and advertising your site is the only reasonable explanation for your postGood point.

Mind you if he/she can't even post a simple list of conversions without errors it's not much of an advert is it :rolleyes:

[Deliverance]

I'm pretty sure it's a bot that trolls and looks for posts that match a certain criteria and posts a generic response based on that.