JAVA problem thank you!

Use the following file:

RainbowViewer.java

import javax.swing.*; public class RainbowViewer { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setSize(300, 400); frame.setTitle("My Rainbow"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); RainbowComponent component = new RainbowComponent(); frame.add(component); frame.setVisible(true); } }