Java

Java: Date Time

Prefer java.time package introduce in Java 8 Prefer java.time.format.DateTimeFormatter than java.text.SimpleDateFormatter Prefer java.time.Instant than java.sql.Timestamp The time since January 1st 1970 in milliseconds System.currentTimeMillis() new Date().getTime() Instant.now().toEpochMilli() new Timestamp(System.currentTimeMillis()).getTime() Measure Code Execution Duration java.util.TimeZone java.time.format.DateTimeFormatter java.time Package java.time – The main API for dates, times, instants, and durations Clock A clock providing access to the …

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Install OpenJDK 11 on macOS

Install using HomeBrew Manual Install from AdoptOpenJDK See: https://adoptopenjdk.net/installation.html Manual Install from jdk.java.net Update download url based on the latest version available in this download page: jdk.java.net/archive. Listing Installed JDK Version Switching JDK Version Get JAVA_HOME path and set it to environment variable. Add the following to ~/.bashrc , ~/.zshrc etc. JShell Also see: https://docs.oracle.com/en/java/javase/11/jshell/snippets.html