ClassNullifier

Makes Java methods blank in classes in a JAR/ZIP file.

If there's a class file compiled from Java file like this,

package com.nao20010128nao;
public class TestClass{
    public static void main(String[] args){
        System.out.println(test());
    }
    public static String test(){
        return "This is a test.";
    }
}

The Java file decompiled from result class file will look like:

package com.nao20010128nao;
public class TestClass{
    public static void main(String[] args){
    }
    public static String test(){
        return null;
    }
}

For all the non-constructor methods, the code will be replaced to:

Return Type	Code
void	;(only one blank statement)
primitive types (except for arrays)	return 0;
non-primitive and array types	return null;

For all the constructors and class initializers, the code will be replaced to ;.
Arguments are kept as is.
Fields are unchangeable because javassist doesn't support to change them.
Non-class file (e.g. META-INF/MANIFEST.MF) are ignored and it will not be included in the output.

Usages

In command line:

• --input=(filename) Input file name (full path) of the JAR/ZIP file. (required)
• --output=(dirname) Output directory to save processed classes (default is to append _nullified on the input's filename)