Java

Java is a versatile programming language that can be installed on Ubuntu 24.04 using different methods, such as “apt”, “deb”, or “SDKMAN”.

To get a current timestamp in Java, we can use methods like “System.currentTimeMillis()”, “Instant.now()”, “Date()” constructor, etc.

To connect PostgreSQL to Java, we can use an open-source JDBC driver. For this purpose, we can use the getConnection() method.

A literal is a synthetic representation of a boolean, char, string, or numeric data.
Java supports various types of literals, such as Integral, boolean, char, etc.

We can use the “Date()” constructor, “Calendar” class, or “Date” Reference for converting a timestamp to a date in Java.

To get a timezone in Java, invoke the getDefault() method of the Timezone class. Use the getAvailableIDs() method to get all available timezone IDs.

To delete a directory using Java, use methods like “delete()”, “FileUtils.deleteDirectory()”, and “FileSystemUtils.deleteRecursively()”.

To convert a date string into a timestamp in Java, you can use built-in methods like “SimpleDateFormat.parse()” and “Timestamp.valueOf()”.