Java开发- Swing AWT-设置背景图片

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Java设置背景图片

如何使用纯正的 JAVASE 设置一个界面的背景图片呢?

import java.awt.*;import javax.swing.*;public class TestLogin  {JFrame jf = new JFrame("[欢迎进入银行自助系统]");JLabel lb0 = new JLabel("     银 行 自 助 终 端");JLabel lb1 = new JLabel("用       户      名:");JLabel lb2 = new JLabel(" 密            码:");//加载背景图片ImageIcon background=new ImageIcon("C:\\welcome.jpg");//用标加载图片JLabel label=new JLabel(background);protected JTextField jt1 = new JTextField(15);         protected  JPasswordField jt2 =  new JPasswordField(15);JButton btn1 = new JButton("登 陆");JButton btn2 = new JButton("重 置");JButton btn3 = new JButton("开 户");public void init() {// 设置标签大小label.setBounds(0, 0, background.getIconWidth(), background.getIconHeight());//主界面获得容器JPaneljf.getLayeredPane().add(label,new Integer(Integer.MIN_VALUE));JPanel jp=(JPanel)jf.getContentPane();//JPanel对象才可以调用setOpaque(false);设置是否透明jp.setOpaque(false);JPanel jpanel = new JPanel();jpanel.setOpaque(false);//去除JPanel默认布局方式,以实现各个控件自己的定位jpanel.setLayout(null);//设置字体颜色lb0.setForeground(Color.YELLOW);lb0.setBounds(198, 5, 200, 30);lb1.setBounds(80, 50, 140, 30);lb2.setBounds(80, 100, 140, 30);jt1.setBounds(188, 50, 180, 23);jt2.setBounds(188, 100, 180, 23);btn1.setBounds(80,180, 100, 25);btn2.setBounds(180,180, 100, 25);btn3.setBounds(280,180, 100, 25);jpanel.add(lb0);jpanel.add(lb1);jpanel.add(lb2);jpanel.add(btn1);jpanel.add(btn2);jpanel.add(btn3);jpanel.add(jt1);jpanel.add(jt2);jf.add(jpanel);jf.setBounds(460, 260, 500, 300);  jf.setVisible(true);}public static void main(String[] args){new TestLogin().init();}}

效果图: