Help with adding border colors

So I'm taking a Computer Programming class for College, and I have this packet due tomorrow. I am stuck on this one problem. I am unsure of how to add border colors around the window. Would anyone mind pointing me in the right direction? Here is my coding if it helps at all. Thanks

//references illustrates the List and TextArea
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import javax.swing.*;//for JFrame and JPanel
public class ListText extends Applet implements ActionListener, ItemListener
{
private List animals = new List(3,true);
private List things = new List(4);
private TextArea text = new TextArea(4,20);
private Button choose = new Button("Choose Animals");
public void init()
{

animals.add("cow");
animals.add("horse");
animals.add("pig");
animals.add("elephant");
animals.add("flea");
animals.add("duck");
animals.add("chicken");
animals.add("dog");
add(animals);
things.add("moon");
things.add("barn");
things.add("cliff");
things.add("brook");
things.add("pond");
things.add("coop");
things.add("yard");
add(things);
add(text);
add(choose);
choose.addActionListener(this);
things.addItemListener(this);

}
public String buildString(String[] animals, String thing)
{
StringBuffer message = new StringBuffer(50);
message.append("The ");
int length = animals.length;
switch(length)
{
case 0: message.append("??");
break;
case 1: message.append(animals[0]);
break;
case 2: message.append(animals[0]);
message.append(" and ");
message.append(animals[1]);
break;
default:
for(int i = 0; i < length-1; i++)
{
message.append(animals);
message.append(", ");

}
message.append("and ");
message.append(animals[length-1]);
}
message.append(" jumped\n over the ");
message.append(thing);
return message.toString();
}
public void actionPerformed(ActionEvent event)
{
Object source = event.getSource();
if (source==choose)
text.setText
(buildString(animals.getSelectedItems(), things.getSelectedItem()));
}
public void itemStateChanged(ItemEvent e)
{
Object source = e.getSource();
if (source==things)
text.setText("You selected " + things.getSelectedItem());
}
}

 

There may be different ways to do this. One way is to use the JApplet class instead of the Applet class, set its background color, and return insets. If your applet is sized correctly in the HTML, you can also try something like:

JPanel contentPanel = new JPanel();
contentPanel.setBorder(BorderFactory.createLineBorder(Color.red, 10));

Then, instead of adding your components to the Applet, add them to the JPanel:

contentPanel.add(animals);

Finally, add the panel itself:

add(contentPanel);