new java.util.Timer().schedule( new java.util.TimerTask() { @Override public void run() { // your code here } }, 5000 ); EDIT: javadoc says: After the last live reference to a Timer object goes away and all outstanding tasks have completed execution, the timer’s task execution thread terminates gracefully (and becomes subject to garbage collection). However, this can … Read more
Simply create a new object and pass the required arguments in the constructor. Point position= new Point((int) (Math.random()*(max – min)),(int) (Math.random() *(max – min))); Point endPosition = new Point(position.x+2, position.y+3);
Parsing date and time To create a LocalDateTime object from a string you can use the static LocalDateTime.parse() method. It takes a string and a DateTimeFormatter as parameter. The DateTimeFormatter is used to specify the date/time pattern. String str = “1986-04-08 12:30”; DateTimeFormatter formatter = DateTimeFormatter.ofPattern(“yyyy-MM-dd HH:mm”); LocalDateTime dateTime = LocalDateTime.parse(str, formatter); Formatting date and … Read more
You could alternatively do: driver.findElements(By.id(“…”)).size() != 0 Which saves the nasty try/catch P.S.: Or more precisely by @JanHrcek here !driver.findElements(By.id(“…”)).isEmpty()
Use findElements instead of findElement. findElements will return an empty list if no matching elements are found instead of an exception. To check that an element is present, you could try this Boolean isPresent = driver.findElements(By.yourLocator).size() > 0 This will return true if at least one element is found and false if it does not … Read more
Any validation in Swing can be performed using an InputVerifier. 1. First create your own input verifier: public class MyInputVerifier extends InputVerifier { @Override public boolean verify(JComponent input) { String text = ((JTextField) input).getText(); try { BigDecimal value = new BigDecimal(text); return (value.scale() <= Math.abs(4)); } catch (NumberFormatException e) { return false; } } } … Read more
As of EJB 3.1, singleton beans can be notified of module start and stop: @Singleton @Startup public class StartupBean { @PostConstruct private void postConstruct() { /* … */ } @PreDestroy private void preDestroy() { /* … */ } } Prior to EJB 3.1, there is no standard, EJB-only solution. I’d suggest adding a WAR to … Read more
The receiver must set port of receiver to match port set in sender DatagramPacket. For debugging, try listening on port > 1024 (e.g. 5000 or 9000). Ports < 1024 are normally used by system services and need admin access to bind on such a port. If the receiver sends packet to the hard-coded port it’s … Read more
You need to add the PostgreSQL JDBC Driver in your project as mentioned in search.maven.org. Gradle: implementation ‘org.postgresql:postgresql:42.2.10’ Maven: <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <version>42.2.10</version> </dependency> You can also download the JAR and import to your project manually. NOTE: Compile as used in this answer is deprecated. Replace with implementation as per 3.