8/31/2023 0 Comments Java to convert string to long![]() ![]() ![]() (You could always write another method to call this one and swallow the exception, if you really want.)Īs ever, I'd strongly recommend that you use Joda Time for date/time work in Java - it's a much cleaner API than /Calendar/etc. Note that I'm punting the decision of what to do if the value can't be parsed to the caller, which makes this code more reusable. If you really want a long, just use: private static long parseDate(String text) SimpleDateFormat dateFormat = new SimpleDateFormat("hh:mm a MM/dd/yyyy",ĭtTimeZone(TimeZone.getTimeZone("UTC")) You probably just want something like this: private static Date parseDate(String text) Take note that a "compound" statement is usually written over a few lines for readability.The problem is you're parsing the data and then messing around with it for no obvious reason, ignoring the documented return value for Date.getYear() etc. No terminating semi-colon needed after the closing brace to end the "compound" statement. Empty block (i.e., no statement inside the braces) is permitted.įor examples, // Each of the followings is a "compound" statement comprising one or more blocks of statements. There is no need to put a semi-colon after the closing brace to end a compound statement. Blocks are used as the body in constructs like class, method, if-else and loop, which may contain multiple statements but are treated as one unit (one body). All the statements inside the block is treated as one single unit. * Comment to state the purpose of the program Don't worry about the other terms and keywords now. Choose a meaningful " Classname" that reflects the purpose of your program, and write your programming statements inside the body of the main() method. You can use the following template to write your Java programs. ![]() Step 3: Run the compiled bytecode Xxx.class with the input to produce the desired output, using the Java Runtime by issuing command: Step 2: Compile the source code Xxx.java into Java portable bytecode Xxx.class using the JDK Compiler by issuing command: Step 1: Write the source code Xxx.java using a programming text editor (such as Sublime Text, Atom, Notepad++, Textpad, gEdit) or an IDE (such as Eclipse or NetBeans). The steps in writing a Java program is illustrated as follows: Basic Syntaxes Steps in Writing a Java Program You may also try the " Exercises on Java Basics". The first few sections are a bit boring, as I have to explain the basic concepts with some details. Learning library could be difficult as it is really huge, evolving and could take on its own life as another programming language. Instead, you can re-use the available code in the library.
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