Java is a popular programming language used for everything from server software to desktop applications and even Android apps. You’ve probably heard of Minecraft, which is written in Java. Running a Java application requires Oracle’s Java runtime on your computer. It was previously developed by Sun, but Oracle purchased Sun — so it’s now Oracle Java instead of Sun Java.
But Java isn’t just used for traditional applications. Back in the 90’s, Sun developed a browser plug-in that allowed you to run Java programs –or “Java applets” — inside web browsers. The Java plug-in isn’t widely used anymore, and it’s been a source of endless security problems. You do not want to run Java applets inside your browser if possible. The Java plug-in — and Java content in web browsers — has proven insecure and bad.
There’s just one Java plug-in, and it’s created by Oracle and bundled along with the Java runtime. If there’s a problem with it, you have to wait for Oracle to fix it. There’s no competition to improve it.