I am using Java8. I have one .jar file containing .class files.
I downloaded the source code of the same .jar file. And I edited one of the file in it. It is .java file.
Now I want to compile all these .java files in the source code and create a new .jar file with .class files
Any clues?
There are many options 1. if you want to do it from command prompt then you would need to set the classpath and then either create a list of java files with package name and use it for compiling, something like this
# Linux
$ find -name "*.java" > source.txt
$ javac -classpath "${CLASSPATH}" @source.txt
:: Windows
> dir /s /B *.java > source.txt
> javac -classpath %{CLASSPATH}% @source.txt
or use build tool like Ant. Once you have the .class files, you can use "jar" command to create a jar of the .class files 2. Use IDE - you can use any of these IDEs - eclipe, intellij, netbeans. You need to setup a project with the java files and compile project and export as jar using class files. I think it would work out better for you to use an IDE.
1) Compile the classes (javac command)
If you don't have any jar dependencies required at compile time, you should not need to set the classpath.
Otherwise you should specify the cp argument with.
Example (Unix way) :
javac -cp "myLib.jar:myOtherLib.jar" *.java
2) Then create a jar from these compiled class (jar command)
Example :
jar cf myjar myFolderWithCompiledClass
extract your jar to a folder and run this: javac [folder]/*.java
read that for more info: https://docs.oracle.com/javase/7/docs/technotes/tools/windows/javac.html
