importPackage(java.awt);
importPackage(javax.swing);

var label = new JLabel("ぱんぽんぱぱーん");
var button = new JButton("ぴぴるぴるぴる");

applet.getContentPane().removeAll();
applet.getContentPane().add(label);
applet.getContentPane().add(button, BorderLayout.NORTH);