Getting the list of packages in a java project

Question

I was trying to get the List of packages from a java src folder by parsing it(using Files). Irrespective of the package structure (some may be com.example.abc, some may be com.example.xxyz.pqr, some may be com.application etc.) i want to get the list of packages in the src folder. Here is the function i've written. I'm getting very strange outputs. Please help me.

public static void displayIt(File node) {

    File[] subNode = node.listFiles();

    if (subNode.length == 1) {

        for (File file : subNode) {
            if (file.isDirectory()) {
                packageName = packageName + file.getName();
                displayIt(file);
            }
        }
    }

    else {
        subFolders = new ArrayList();
        for (File file : subNode) {
            // parent.add(file.getName());
            subFolders.add(file.getName());
            if (file.isDirectory()) {
                File[] subDir = file.listFiles();
                for (File tempFile : subDir) {

                    if (tempFile.isDirectory()) {

                        // temp=file.getName()+"."+tempFile.getName();
                        packageList
                                .add(file.getName() + tempFile.getName());

                        displayIt(tempFile);
                    }

                }

            }

            displayIt(file);
        }
    }

}

Rustam · Accepted Answer

you can do like this :

public class Test {

    /**
     * @param args
     */
    public static void main(String[] args) {

        Set files=new HashSet<>();
        listOfPackage("src/",files);

        System.out.println(files);
    }

    public static void listOfPackage(String directoryName, Set pack) {
        File directory = new File(directoryName);

        // get all the files from a directory
        File[] fList = directory.listFiles();
        for (File file : fList) {
            if (file.isFile()) {
                String path=file.getPath();
                String packName=path.substring(path.indexOf("src")+4, path.lastIndexOf('\'));
                pack.add(packName.replace('\', '.'));
            } else if (file.isDirectory()) {

                listOfPackage(file.getAbsolutePath(), pack);
            }
        }
    }
}

output:

[com.think.android, com.think.java, com.test.java]

Getting the list of packages in a java project

Answers (2)

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