How to edit class files

class file in java is generated when you compile . java file using any Java compiler like Sun’s javac which comes along with JDK installation and can be found in JAVA_HOME/bin directory .

A CLASS file is a compiled . JAVA file created by the Java compiler. It contains bytecode, which is binary program code that is executable when run by a Java Virtual Machine (JVM) . CLASS files are commonly bundled into .

In Java application, the entry point is the main() method. The javac command is used to convert the Java source file into the class file . The java command is used to run a Java program stored in a . class file.