import com.spire.presentation.*;
import com.spire.presentation.drawing.FillFormatType;

import java.awt.*;

public class ChangeFontStyles {

    public static void main(String[] args) throws Exception {

        //Create a Presentation object
        Presentation presentation = new Presentation();

        //Load the sample PowerPoint file
        presentation.loadFromFile("C:\\Users\\Administrator\\Desktop\\sample.pptx");

        //Get the text shape
        IAutoShape shape = (IAutoShape) presentation.getSlides().get(0).getShapes().get(0);

        //Get the first paragraph and change the font color of it
        ParagraphEx paragraph = shape.getTextFrame().getParagraphs().get(0);
        PortionEx textRange =  paragraph.getFirstTextRange();
        textRange.getFormat().getFill().setFillType(FillFormatType.SOLID);
        textRange.getFormat().getFill().getSolidColor().setColor(Color.blue);

        //Get the second paragraph and make the text bold, italic and unlined
        paragraph = shape.getTextFrame().getParagraphs().get(1);
        textRange = paragraph.getFirstTextRange();
        textRange.getFormat().isBold(TriState.TRUE);
        textRange.getFormat().isItalic(TriState.TRUE);
        textRange.getFormat().setTextUnderlineType(TextUnderlineType.DASHED);

        //Get the third paragraph and change the font name and size
        paragraph = shape.getTextFrame().getParagraphs().get(2);
        textRange = paragraph.getFirstTextRange();
        textRange.getFormat().setLatinFont(new TextFont("Segoe Print"));
        textRange.getFormat().setFontHeight(22f);

        //Save the document
        presentation.saveToFile("output/ChangeFontStyles.pptx", FileFormat.PPTX_2013);
    }
}