GroupDocsGists

// Count Words in PDF document using Java
// Count Unique Words and their occurrences in PDF document using Java
try (Parser parser = new Parser("path/document.pdf")) {

	TextReader reader = parser.getText();
	String text = reader.readToEnd();

	String[] words = text.split("\\s+|\\.|\\,|\\?|\\:|\\;");
	System.out.println("Length:" + words.length);
}

GroupDocsGists

// Remove selective pages from the PDF in Java
RemoveOptions removeOptions = new RemoveOptions(new int[] { 2, 4 });

Merger merger = new Merger("path/document-pdf");
merger.removePages(removeOptions);
merger.save("path/selected-pages-removed.pdf");

GroupDocsGists

// Supported file formats: https://docs.groupdocs.com/redaction/java/supported-document-formats/

final Redactor redactor = new Redactor("sample.pdf");
try
{
    redactor.apply(new ExactPhraseRedaction("John Doe", new ReplacementOptions(java.awt.Color.RED)));
    redactor.save();
}
finally { redactor.close();
}

GroupDocsGists

// Supported file formats: https://docs.groupdocs.com/redaction/java/supported-document-formats/

final Redactor redactor = new Redactor("sample.pdf");
try
{
    redactor.apply(new ExactPhraseRedaction("John Doe", true /*isCaseSensitive*/, new ReplacementOptions("[personal]")));
    redactor.save();
}
finally { redactor.close(); }

GroupDocsGists

//Supported file formats: https://docs.groupdocs.com/redaction/java/supported-document-formats/

final Redactor redactor = new Redactor("sample.pdf");
try 
{
    redactor.apply(new ExactPhraseRedaction("John Doe", new ReplacementOptions("[personal]")));
    redactor.save();
}
finally { redactor.close(); }

GroupDocsGists

// How to change page orientation of Word document to Landscape in Java
OrientationOptions orientationOptions = new OrientationOptions(OrientationMode.Landscape, new int[] { 1, 2 });
Merger merger = new Merger("path/document.docx");
merger.changeOrientation(orientationOptions);
merger.save("path/orientation-landscape-document.docx");

GroupDocsGists

// Remove the watermarks from PDF & other Documents in Java
Watermarker watermarker = new Watermarker("filepath/document-with-watermarks.pdf");

PossibleWatermarkCollection possibleWatermarks = watermarker.search();
for (int i = 0 ; i < watermarks.getCount(); i++)
{
    // Remove every watermark by mentioning the index within the document.
    possibleWatermarks.removeAt(i);
}
watermarker.save("filepath/no-watermarks.pdf");

GroupDocsGists

// Edit the Excel XLS/XLSX documents in Java
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();
loadOptions.setPassword("password-if-any");

// Loading Spreadsheet
Editor editor = new Editor("path/sample_sheet.xlsx", loadOptions);

// Edit 1st tab of the Spreadsheet
SpreadsheetEditOptions editOptions = new SpreadsheetEditOptions();
editOptions.setWorksheetIndex(0); // index is 0-based, so this is 1st tab

GroupDocsGists

// Edit the Word DOC/DOCX documents in Java
Options.WordProcessingLoadOptions loadOptions = new WordProcessingLoadOptions();
loadOptions.setPassword("password-if-any");

Editor editor = new Editor("path/document.docx", loadOptions);
EditableDocument defaultWordProcessingDoc = editor.edit();

// Either edit using any WYSIWYG editor or edit programmatically
String allEmbeddedInsideString = defaultWordProcessingDoc.getEmbeddedHtml();
String allEmbeddedInsideStringEdited = allEmbeddedInsideString.replace("document", "edited document");

GroupDocsGists

// Convert PDF to Grayscale PNG in Java
Converter converter = new Converter("path/document.pdf");

ImageConvertOptions options = new ImageConvertOptions();
options.setFormat(ImageFileType.Jpg);
options.setGrayscale(true);
/*
options.setFlipMode(ImageFlipModes.FlipY);
options.setBrightness(50);
options.setContrast(50);