- public static void main(String[] args) {
- JFrame j = new JFrame();
- JPanel p =new JPanel();
- j.setSize(600, 400);
- j.setUndecorated(true);
- j.setLocationRelativeTo(null);
- /**
- * 设置背景透明
- */
- j.setBackground(new Color(0,0,0,0));
- j.setVisible(true);
- /**
- * 添加border
- */
- j.add(p);
- p.setBackground(new Color(0,0,0,0));
- p.setBorder(new LineBorder(new Color(255, 0, 0)));
- }
-
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