//Accessing the first and second placeholder in the slide and typecasting it as AutoShape
ITextFrame tf1 = ((IAutoShape)slide.getShapes().get_Item(0)).getTextFrame();
ITextFrame tf2 = ((IAutoShape)slide.getShapes().get_Item(1)).getTextFrame();
//Accessing the first Paragraph
IParagraph para1 = tf1.getParagraphs().get_Item(0);
IParagraph para2 = tf2.getParagraphs().get_Item(0);
//Accessing the first portion
IPortion port1 = para1.getPortions().get_Item(0);
IPortion port2 = para2.getPortions().get_Item(0);
//Define new fonts
FontData fd1 = new FontData("Elephant");
FontData fd2 = new FontData("Castellar");