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// Define the path for the working directory.
String dir = "/Desktop/";
// Instantiate a FileInputStream object to read input bytes from a file located in the file system. 
try (FileInputStream fs = new FileInputStream(dir + "encrypted.rar")) {
    // Create an object of the RarArchiveLoadOptions class. 
    RarArchiveLoadOptions options = new RarArchiveLoadOptions();
    // Invoke the setDecryptionPassword method to set password to decrypt the RAR file.  
    options.setDecryptionPassword("p@s$");
    // Initialize a new instance of the RarArchive class. 
    try (RarArchive archive = new RarArchive(fs, options)) {

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Learn how to Convert Image to Base64 in Python

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try (FileInputStream fs = new FileInputStream(dir + "sample.rar")) {
    try (RarArchive archive = new RarArchive(fs)) {
        // The extract method extracts the entry to the filesystem by the path provided. 
        archive.getEntries().get(0).extract(dir + "sample-1_1.webp");
    }
} catch (IOException e) {
    e.printStackTrace();
}

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String dir = "/Desktop/";
// Create an object of the FileInputStream class to obtain input bytes from a file in a file system.  
try (FileInputStream fs = new FileInputStream(dir + "sample.rar")) {
    // Initialize a new instance of the RarArchive class with the input stream.  
    RarArchive archive = new RarArchive(fs);
    // Call extractToDirectory method to extract the files in the directory. 
    archive.extractToDirectory(dir + "DecompressRar_out");
} catch (IOException e) {
    e.printStackTrace();
}

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Lern how to Convert Publisher to PNG in Java

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  // Define path for the working directory. 
  String dir = "/Desktop/";
  // Initialize a new object of the TraditionalEncryptionSettings class with a desired password.
  TraditionalEncryptionSettings traditionalEncryptionSettings = new TraditionalEncryptionSettings("asdf");
  // Instantiate an instance of the ArchiveEntrySettings class. 
  ArchiveEntrySettings archiveEntrySettings = new ArchiveEntrySettings(null,traditionalEncryptionSettings);
  // Create an object of the Archive class and initialize it with the object of the ArchiveEntrySettings class. 
  try (Archive archive = new Archive(archiveEntrySettings)) {
    // Call the createEntry method to create single entry within the archive.  
    archive.createEntry("picture.png", dir+"picture.png");

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Learn how to get OneNote Outlook tasks in Java

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//sourceFile.eml, sourceFile.emlx, sourceFile.oft
MailMessage message = MailMessage.Load("sourceFile.msg");

message.Save("HtmlOutput.html", SaveOptions.DefaultHtml);
Document document = new Document("HtmlOutput.html");
// SaveFormat.Png, Bmp, Gif, Jpeg, Tiff
document.Save("output.png", SaveFormat.Png); 

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//DOC DOCM DOCX DOT DOTM DOTX
Aspose.Words.Document docx = new Aspose.Words.Document("sourceWordFile.docx");

// Save DOCX file to HTML 
docx.Save("filepath\\test.html", SaveFormat.Html);

// To convert multi pages DOCX documents, export each page to HTML separately using Aspose.Words and then use the below code to convert to PPTX.

using (Presentation pptx = new Presentation()){

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var book = new Aspose.Cells.Workbook("input.csv");
book.Save("pdfOutput.pdf", Aspose.Cells.SaveFormat.Auto); 
var document = new Aspose.Pdf.Document("pdfOutput.pdf");
// save document in PPTX format
document.Save("output.pptx", SaveFormat.Pptx);