!747

m {
  p {
    JFrame jf = new JFrame("Courier?");
    jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container cp = jf.getContentPane();

    JTextPane pane = new JTextPane();
    
    appendToTextPane(pane, Color.green, "Hello! \n");
    appendToTextPane(pane, Color.blue, "World :)\n");
    
    cp.add(new JScrollPane(pane), BorderLayout.CENTER);

    jf.setSize(400, 300);
    jf.setVisible(true);
  }
  
  static void appendToTextPane(JTextPane pane, Color color, S text) ctex {
    Document doc = pane.getStyledDocument();
    SimpleAttributeSet set = new SimpleAttributeSet();
    StyleConstants.setFontFamily(set, "Courier");
    StyleConstants.setBackground(set, color);
    doc.insertString(doc.getLength(), text, set);
  }
}

Began life as a copy of #1000992