jFrame背景图片设置

import java.awt.Container;
import java.awt.FlowLayout;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class BgTest extends JFrame{

public BgTest(){      init();  }  private void init() {      JLabel lbl1 = new JLabel("用户名：");      JLabel lbl2 = new JLabel("密　码：");      JTextField txt = new JTextField(10);      JPasswordField pasw = new JPasswordField(10);      pasw.setEchoChar('*');      JButton btn1 = new JButton("登录");      JButton btn2 = new JButton("取消");      ImageIcon img = new ImageIcon("images/bgTest.jpg");      //要设置的背景图片      JLabel imgLabel = new JLabel(img);      //将背景图放在标签里。      this.getLayeredPane().add(imgLabel, new Integer(Integer.MIN_VALUE));      //将背景标签添加到jfram的LayeredPane面板里。      imgLabel.setBounds(0, 0, img.getIconWidth(), img.getIconHeight());      // 设置背景标签的位置      Container contain = this.getContentPane();      ((JPanel) contain).setOpaque(false);       // 将内容面板设为透明。将LayeredPane面板中的背景显示出来。      contain.setLayout(new FlowLayout());      contain.add(lbl1);      contain.add(txt);      contain.add(lbl2);      contain.add(pasw);      contain.add(btn1);      contain.add(btn2);      this.setTitle("背景图设置");      this.setSize(200, 200);//设置窗体大小      this.setLocation(600, 300);      this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);      this.setResizable(false);      this.setVisible(true);  }  public static void main(String[] args) {      new BgTest();   }  

}

设置Frame icon图标：

 ImageIcon imgIcon = new ImageIcon("images/rear.gif");        Image img = imgIcon.getImage();        this.setIconImage(img);