Java class file

A Java class file is a file (with the . class filename extension) containing Java bytecode that can be executed on the Java Virtual Machine (JVM) . … If a source file has more than one class, each class is compiled into a separate class file.

A Java class file is a file (with the . class filename extension) containing Java bytecode that can be executed on the Java Virtual Machine (JVM) . … If a source file has more than one class, each class is compiled into a separate class file.

A simple way to see what String literals are used in a “. class” file is to use the javap utility in your JDK installation to dump the file using the “-v” option. Then grep for text that looks like <String “…”> where … is the String you are looking for.

A simple way to see what String literals are used in a “. class” file is to use the javap utility in your JDK installation to dump the file using the “-v” option. Then grep for text that looks like <String “…”> where … is the String you are looking for.

The language it produces is still bytecode (not anything like Java), but it’s fairly readable and extremely instructive. Also, if you really want to, you can open up any . class file in a hex editor and read the bytecode directly . The result is identical to using javap .9 Kas 2011

The language it produces is still bytecode (not anything like Java), but it’s fairly readable and extremely instructive. Also, if you really want to, you can open up any . class file in a hex editor and read the bytecode directly . The result is identical to using javap .9 Kas 2011