我的思路是：可以在JPanel繪圖，然後把JPanel容器添加到JFrame容器面板中。代碼如下。
public class first4 extends JFrame{
public first4() {
JPanel p1 = new firstPanel();
JPanel p2 = new JPanel();
JLabel label = new JLabel("哈哈");
JButton button = new JButton("提交");
p2.add(label);
p2.add(button);
this.getContentPane().add(p1);
this.getContentPane().add(p2,BorderLayout.SOUTH);
this.setSize(800,400);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new first4();
}
}
class firstPanel extends JPanel{
String s = "歡迎進入";
public void paint(Graphics g) {
g.setColor(new Color(130, 135, 205));
g.drawLine(200, 160, 340, 160);
g.drawLine(420, 160, 560, 160);
g.drawLine(250, 200, 246, 218);
g.drawLine(270, 200, 260, 240);
g.drawLine(510, 200, 514, 218);
g.drawLine(490, 200, 500, 240);
g.drawRoundRect(345, 220, 70, 50, 30, 20);
g.setColor(Color.RED);
g.setFont(new Font("Dialog", Font.ITALIC + Font.BOLD, 40));
g.drawString(s, 300, 60);
g.setColor(Color.RED);
}
}