设置组件透明，文字格式。

import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.LayoutManager;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

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

public  class UIinterface extends JFrame {
	JLayeredPane pane = new JLayeredPane();//分层网格
	JLabel label;
	JPanel panel1 = new JPanel();
	JPanel panel2 = new JPanel();
	JPanel panel3 = new JPanel();
	JTextField field1 = new JTextField("账号");
	JTextField field2 = new JTextField("密码");
	JButton Land = new JButton("登陆");
	JButton register = new JButton("注册");
	ImageIcon image;
	/**
	 * 
	 */
	public UIinterface() {
		image = new ImageIcon("jpp/蜘蛛侠.jpg");
		//设置字体格式和大小
        field1.setFont(new Font("宋体",Font.PLAIN,30));
        //设置字体颜色
        field1.setForeground(Color.BLUE);
        field2.setFont(new Font("宋体",Font.PLAIN,30));
        field2.setForeground(Color.BLUE);
        Land.setFont(new Font("宋体",Font.PLAIN,20));
        Land.setForeground(Color.darkGray);
        register.setFont(new Font("宋体",Font.PLAIN,20));
        register.setForeground(Color.darkGray);
        //设置组件透明
        field1.setOpaque(false);
        field2.setOpaque(false);
        Land.setOpaque(false);
        register.setOpaque(false);
        panel1.setOpaque(false);
        panel2.setOpaque(false);
        panel3.setOpaque(false);
        
		label = new JLabel(image);		//把背景图片添加到标签里

		panel1.setBounds(0, 0, image.getIconWidth(), image.getIconHeight());	//把标签设置为和图片等高等宽

		panel1 = (JPanel)this.getContentPane();	//把我的面板设置为内容面板
		
		panel1.add(label);
		
		panel2.setLayout(new GridLayout(2,1));
		panel2.setBounds(50, 100, 350, 80);
				
		panel2.add(field1);
		panel2.add(field2);
		
		panel3.setBounds(50,250,350,40);
		
		panel3.add(Land);
		panel3.add(register);
		
		Land.setSize(20,30);
		register.setSize(20,30);
		
		pane.add(panel1,JLayeredPane.DEFAULT_LAYER);//带有标签的面板放在最底层
		pane.add(panel2,JLayeredPane.DRAG_LAYER);
		pane.add(panel3,JLayeredPane.POPUP_LAYER);
		

		this.setTitle("QQ");
		this.setBounds(100,100,image.getIconWidth(), image.getIconHeight());
		this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
		this.setLayeredPane(pane);
		this.setVisible(true);
	}

	
}
设置组件透明，文字格式。
比较丑的一个页面，主要在于学习新内容。