import com.spire.doc.Document;
import com.spire.doc.FileFormat;
import com.spire.doc.Section;
import com.spire.doc.documents.Paragraph;

public class SetParagraphSpacing {

    public static void main(String[] args) {

        //Create a Document instance
        Document doc = new Document();

        //Add a section
        Section section = doc.addSection();

        //Add a paragraph
        Paragraph para = section.addParagraph();
        para.appendText("Spire.Doc for Java is a professional Java Word API that enables Java applications to " +
                "manipulate Word documents without using Microsoft Office.");

        //Set paragraph after spacing
        para.getFormat().setAfterSpacing(20f);

        //Add another paragraph
        para = section.addParagraph();
        para.appendText("A plenty of Word document processing tasks can be performed by Spire.Doc for Java, "+
                "such as creating, comparing, reading, editing, converting and printing Word documents, "+
                "inserting image, adding header and footer, creating table and adding form field.");
        
        //Save the document
        doc.saveToFile("output/SetParagraphSpacing.docx", FileFormat.Docx_2013);
    }
}

import com.spire.doc.Document;
import com.spire.doc.FileFormat;
import com.spire.doc.Section;
import com.spire.doc.documents.Paragraph;

public class SetLineSpacing {

    public static void main(String[] args) {

        //Create a Document instance
        Document doc = new Document();

        //Add a section
        Section section = doc.addSection();

        //Add a paragraph
        Paragraph para = section.addParagraph();
        para.appendText("Spire.Doc for Java is a professional Java Word API that enables Java applications to " +
                "manipulate Word documents without using Microsoft Office. A plenty of Word document " +
                "processing tasks can be performed by Spire.Doc for Java, such as creating, comparing, " +
                "reading, editing, converting and printing Word documents, inserting image, adding header " +
                "and footer, creating table and adding form field.");

        //Set line spacing
        para.getFormat().setLineSpacing(30f);

        //Save the document
        doc.saveToFile("SetLineSpacing.docx", FileFormat.Docx_2013);
    }
}