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How to use jar files without package information?


How to use jar files without package information?

By : Phạm Thế Anh
Date : October 25 2020, 12:12 PM
will be helpful for those in need To mention something that relates more to the title of the question: In Java, you can't access classes in the default package from code within a named package.
This means, if the classes in your jar file do not belong explicitly to any package and inside the jar your files are directly in the root folder without subfolders, they are in the default package. This is not very elaborated and lacks modularity as well as extensibility, but is technically alright. Then, you can only use these classes from code which also is in the default package. But this does not necessarily mean it has to be in the same jar. If you have multiple src or class folders they could all contain classes in the default package which can interact. The organization in JAR files and the package structure in your project are independent of each other.
code :


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How do I automatically convert all javadoc package.html files into package-info.java files?

How do I automatically convert all javadoc package.html files into package-info.java files?


By : user2675607
Date : March 29 2020, 07:55 AM
Hope this helps You may need to change the directory separator if you're not running windows. Also, the conversion is a bit of a hack, but it should work. Out of curiosity, how many packages do you have that manual isn't an option?
code :
public class Converter {

    public static void main(String[] args) {
        File rootDir = new File(".");
        renamePackageToPackageInfo(rootDir);
    }

    private static void renamePackageToPackageInfo(File dir) {
        File[] files = dir.listFiles(new FilenameFilter() {
            @Override
            public boolean accept(File dir, String name) {
                return "package.html".equals(name);
            }
        });
        for (File file : files) {
            convertFile(file);
        }
        // now recursively rename all the child directories.
        File[] dirs = dir.listFiles(new FileFilter() {
            @Override
            public boolean accept(File pathname) {
                return pathname.isDirectory();
            }
        });
        for (File subdir : dirs) {
            renamePackageToPackageInfo(subdir);
        }
    }

    private static void convertFile(File html) {
        // determine the FQN package name
        String fqpn = getPackageName(html);

        // check if package-info.java already exists
        File packageInfo = new File(html.getParent(), "package-info.java");
        if (packageInfo.exists()) {
            System.out.println("package-info.java already exists for package: "+fqpn);
            return; 
        }

        // create the i/o streams, and start pumping the data
        try {
            PrintWriter out = new PrintWriter(packageInfo);
            BufferedReader in = new BufferedReader(new FileReader(html));
            out.println("/**");

            // skip over the headers
            while (true) {
                String line = in.readLine();
                if (line.equalsIgnoreCase("<BODY>"))
                    break;
            }
            // now pump the file into the package-info.java file
            while (true) {
                String line = in.readLine();
                if (line.equalsIgnoreCase("</BODY>"))
                    break;
                out.println(" * " + line);
            }

            out.println("*/");
            out.println("package "+fqpn+";");
            out.close();
            in.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // queue the package.html file for deletion
        //html.deleteOnExit();
    }

    private static String getPackageName(File file) {
        StringBuilder path = new StringBuilder(file.getParent());
        // trim the first two characters (./ or .\)
        path.delete(0, 2);
        // then convert all separators into . (HACK: should use directory separator property)
        return path.toString().replaceAll("\\\\", ".");
    }

}
how to populate class summary field on package information page (package-info.java)?

how to populate class summary field on package information page (package-info.java)?


By : Patrick Li
Date : March 29 2020, 07:55 AM
will be helpful for those in need You want to put the Javadoc comment above the class declaration (See below). See the following Javadoc tutorial for a quick guide to providing some of these descriptions and other metadata throughout your source code.
code :
/**
 * My class description
 */
public class SSOhandler {

}
UWP App package information sample app - where it is showing package identity

UWP App package information sample app - where it is showing package identity


By : user2341613
Date : March 29 2020, 07:55 AM
will help you The PackageId (see Docs) is not a simple string, but instead a full class having several properties which give you access to individual components which together make up the application's unique ID.
The most interesting for you might be FullName, which is the full unique identifier of the specific version of your package, and FamilyName which is a version-agnostic identifier of your app.
How to specify the package name if multiple files exist in the package folder and one file contains the "package ma

How to specify the package name if multiple files exist in the package folder and one file contains the "package ma


By : Leonard
Date : March 29 2020, 07:55 AM
I wish this help you go files in the same package AKA folder must have the same package name. The only exception are tests that can have a _test extension. The rule is 1 folder , 1 package therefore the same package name for all go files in the same folder.
The answer is yes , move the "hello" package files to their own folder or , use the same package name for all files in the same directory.
Dpkg: warning: files list file for package 'x'missing; assuming package has no files currently installed in Ubuntu 16.04

Dpkg: warning: files list file for package 'x'missing; assuming package has no files currently installed in Ubuntu 16.04


By : Nidhi
Date : March 29 2020, 07:55 AM
this will help I solved this problem at last night. If you know Chinese, you can read this solution on my blog. I'll detail it here with my poor English.
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