《java文本框只有下面一条线.doc》由会员分享，可在线阅读，更多相关《java文本框只有下面一条线.doc（4页珍藏版）》请在金锄头文库上搜索。
1、package com.llt.demo;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.Rectangle;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JPasswordField;import javax.swing.JTextField;import javax.swing.SwingUtilities
2、;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;import javax.swing.border.MatteBorder;import javax.swing.JLabel;/* * author 刘力天 */public class LoginFrame extends JFrame private static final long serialVersionUID = 1L; private JPanel jContentPane = null; private JText
3、Field userName = null; private JPasswordField password = null; private JButton loginButton = null; /* * 创建用户名文本框 * * return javax.swing.JTextField */ private JTextField getUserName() if (userName = null) userName = new JTextField();/ 创建文本框 userName.setBackground(new Color(0, 0, 0, 0);/ 设置文本框透明背景色 /
4、设置文本框位置与大小 userName.setBounds(new Rectangle(70, 26, 162, 21);/ 设置文本框大小 MatteBorder border = new MatteBorder(0, 0, 2, 0, new Color(0, 250, 154);/ 创建边框 userName.setBorder(border);/ 色绘制边框 return userName; /* * 创建密码框 * * return javax.swing.JPasswordField */ private JPasswordField getPassword() if (passw
5、ord = null) password = new JPasswordField();/ 创建密码框 / 设置密码框位置和大小 password.setBounds(new Rectangle(71, 57, 159, 22); password.setBackground(new Color(0, 0, 0, 0);/ 设置透明颜色 password.setOpaque(false);/ 设置透明 password.setBorder(new MatteBorder(0, 0, 2, 0, new Color(255, 215, 0);/ 设置边框 password.setEchoChar
6、();/ 设置密码框字符 return password; /* * 创建登录按钮 * * return javax.swing.JButton */ private JButton getLoginButton() if (loginButton = null) loginButton = new JButton(登录); / 设置按钮位置与大小 loginButton.setBounds(new Rectangle(244, 22, 68, 68); return loginButton; /* * 主类的入口方法 * * param args * throws UnsupportedLo
7、okAndFeelException * 不支持的外观 */ public static void main(String args) throws UnsupportedLookAndFeelException try UIManager .setLookAndFeel(com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel); catch (Throwable e) e.printStackTrace(); / 设置窗体外观 SwingUtilities.invokeLater(new Runnable() public void run() /
8、创建登录窗体 LoginFrame loginFrame = new LoginFrame(); / 显示登录窗体 loginFrame.setVisible(true); ); /* * 登录窗体的构造方法 */ public LoginFrame() /关闭 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); /标题 setTitle(文本框的下划线边框); /面板集合 jContentPane = new JPanel(); / 设置窗体内容面板 this.setContentPane(jContentPane); / 设置布局管理器 jCon
9、tentPane.setLayout(new BorderLayout(); /面板 JPanel panel = new JPanel(); /面板背景颜色 panel.setBackground(Color.WHITE); /面板布局 panel.setLayout(null); / 添加文本框 panel.add(getUserName(), null); / 添加密码框 panel.add(getPassword(), null); / 添加登录按钮 panel.add(getLoginButton(), null); jContentPane.add(panel, BorderLayout.CENTER); JLabel label = new JLabel(用户名：); label.setBounds(22, 26, 55, 18); panel.add(label); JLabel label_1 = new JLabel(密码：); label_1.setBounds(22, 59, 55, 18); panel.add(label_1); / 设置窗体大小 setSize(new Dimension(375, 143); setLocationRelativeTo(null);/ 窗体居中
