How to extract all String from all Java files in a Java project?

Question

I need to extract all hard coded Strings values from all Java files in a Java project
Into a Java Constant file

for example

Input

// Java file number 1
public class A {    
    public static void main(String[] args) {
        System.out.println("HardCoded String A");
    }
}

// Java file number 2
public class B {    
    public static void main(String[] args) {
        System.out.println("HardCoded String B");
    }
}

Output

// a Java Constant file
public class MyConstants {  
    public static final String HardCodedString_01 = "HardCoded String A";
    public static final String HardCodedString_02 = "HardCoded String B";   
}

// Java file number 1
public class A {    
    public static void main(String[] args) {
        System.out.println(MyConstants.HardCodedString_01);
    }
}

// Java file number 2
public class B {    
    public static void main(String[] args) {
        System.out.println(MyConstants.HardCodedString_01);
    }
}

I am aware of Externalize Strings for Eclipse
BUT it works over one file not all files

And when i check this post
Extract all string from a java project
I could not find the link of provided presentation

Also i check this post
Externalize strings for Android project
But that is provided for Android projects not Java projects

Answer 1

First to inspect all hard coded Strings values from all using Eclipse
The core idea is that
The Regular Expression of Java hard coded String value is "*"
So
We can do that Using search by this criteria
For example

Eclipse Search Inquiry

Eclipse Search Result

Answer 2

Might be a over-engineered solution, but give a try to sonarqube which can give you static analysis of code and much more than just hard-coded string values.

If you are looking for a code to do that, you can try linux commandline (e.g. grep -rnw '/path/to/somewhere/' -e "pattern") solutions.