What command is used to compile a Java program?

The command used to compile a Java program is javac. This command compiles Java source files (with a .java extension) into bytecode files (with a .class extension) that can be executed by the Java Virtual Machine (JVM).

Here’s the basic syntax for using the javac command:

javac YourJavaFile.java

For example, if you have a Java file named HelloWorld.java, you would compile it using the following command:

javac HelloWorld.java

After successful compilation, this will generate a file named HelloWorld.class, which contains the bytecode that can be run using the java command:

java HelloWorld

Make sure to run the javac command in the directory where your Java file is located, or provide the full path to the file.