How to set foreground color for different words in a JTextPane

To set the foreground color for different words, use the SimpleAttributeSet and StyleConstants class. With that, use StyledDocument class as well for different words style. For different words, use insertString().

At first, create a new JTextPane -

At first, create a new JTextPane:
JTextPane pane = new JTextPane();

Now, use the classes to set the style and color for some words −

StyledDocument doc = textPane.getStyledDocument();
Style style = textPane.addStyle("", null);
StyleConstants.setForeground(style, Color.red);
StyleConstants.setBackground(style, Color.white);
doc.insertString(doc.getLength(), "Game of Thrones ", style);

Now, style some other words differently −

StyleConstants.setForeground(style, Color.yellow);
StyleConstants.setBackground(style, Color.gray);
doc.insertString(doc.getLength(), "Season 8", style);

The following is an example to set foreground color for different words in a JTextPane −

Example

package my;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
public class SwingDemo {
   public static void main(String args[]) throws BadLocationException {
      JFrame frame = new JFrame("Demo");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      Container container = frame.getContentPane();
      JTextPane textPane = new JTextPane();
      textPane.setBackground(Color.orange);
      SimpleAttributeSet attributeSet = new SimpleAttributeSet();
      StyleConstants.setItalic(attributeSet, true);
      textPane.setCharacterAttributes(attributeSet, true);
      textPane.setText("We waited long for ");
      Font font = new Font("Serif", Font.ITALIC, 18);
      textPane.setFont(font);
      StyledDocument doc = textPane.getStyledDocument();
      Style style = textPane.addStyle("", null);
      StyleConstants.setForeground(style, Color.red);
      StyleConstants.setBackground(style, Color.white);
      doc.insertString(doc.getLength(), "Game of Thrones ", style);
      StyleConstants.setForeground(style, Color.yellow);
      StyleConstants.setBackground(style, Color.gray);
      doc.insertString(doc.getLength(), "Season 8", style);
      JScrollPane scrollPane = new JScrollPane(textPane);
      container.add(scrollPane, BorderLayout.CENTER);
      frame.setSize(550, 300);
      frame.setVisible(true);
   }
}

Output