What methods can be used to initiate the launch of a Java Virtual Machine?

Starting the Java Virtual Machine (JVM) can be initiated in the following ways:

1. Via the command line using the java command:

   java -jar myapp.jar
   

   or

   java MyMainClass
   

2. From an Integrated Development Environment (IDE) — for example, IntelliJ IDEA, Eclipse, where execution is done through run configurations.

3. Programmatically — by calling Runtime.getRuntime().exec() to launch an external JVM process.

4. Through scripts or build systems — for example, Gradle, Maven, which invoke the JVM to run applications or tests.

5. Embedding JVM into a native application — using JNI (Java Native Interface) to create and start a JVM from C/C++ code.

Thus, the main and most common way is to run via the command line or IDE, as well as programmatic methods for more complex scenarios.