本文实例为大家分享了Java swing 仿QQ账号密码输入框，供大家参考，具体内容如下
主要思路是自己定义 AccountPanel 和 PasswordPanel 类，继承JPanel，通过 paintComponent(Graphics g) 方法重绘面板，实现目标样式。
先上效果图
正常显示效果:
鼠标放在控件上时的效果:
腾讯QQ登录界面的账号密码输入部分效果比对:
下面直接给出代码吧
AccountPanel:
import java.awt.BasicStroke;import java.awt.Color;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.RenderingHints; import javax.swing.JPanel; public class AccountPanel extends JPanel{ private static final long serialVersionUID = 1L; private Color normalc=Color.LIGHT_GRAY; private Color borderc=Color.LIGHT_GRAY; private boolean flag=false; public AccountPanel(){} public AccountPanel(Color normalc,Color borderc){ this.normalc=normalc; this.borderc=borderc; } public void setBorder(boolean flag){ this.flag=flag; } @Override public void paintComponent(Graphics g){ super.paintComponent(g); Graphics2D g2=(Graphics2D) g; //设置绘图质量 g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON); //画一个顶部两个角为圆角，底部两个角为直角的矩形 g2.setColor(Color.white); g2.fillRoundRect(0, 0, 190, 30, 10, 10); g2.fillRect(0, 10, 190, 17); //为该矩形添加边框 if(flag){ g2.setStroke(new BasicStroke(2.0f)); g2.setColor(borderc); g2.drawArc(1, 1, 10, 10, 180, -90);//绘制圆弧 g2.drawLine(5, 1, 185, 1); g2.drawArc(179, 1, 10, 10, 90, -90);//绘制圆弧 g2.drawLine(1, 5, 1, 29); g2.drawLine(189, 5, 189, 29); g2.drawLine(1, 29, 190, 29); } else{ g2.setStroke(new BasicStroke(1.0f)); g2.setColor(normalc); g2.drawArc(0, 0, 10, 10, 180, -90);//绘制圆弧 g2.drawLine(5, 0, 185, 0); g2.drawArc(179, 0, 10, 10, 90, -90);//绘制圆弧 g2.drawLine(0, 5, 0, 30); g2.drawLine(189, 5, 189, 30); g2.drawLine(0, 30, 190, 30); } } }
PasswordPanel:
import java.awt.BasicStroke;import java.awt.Color;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.RenderingHints; import javax.swing.JPanel; public class PasswordPanel extends JPanel{ private static final long serialVersionUID = 1L; private Color normalc=Color.LIGHT_GRAY; private Color borderc=Color.LIGHT_GRAY; private boolean flag=false; public PasswordPanel(){} public PasswordPanel(Color normalc,Color borderc){ this.normalc=normalc; this.borderc=borderc; } public void setBorder(boolean flag){ this.flag=flag; } @Override public void paintComponent(Graphics g){ super.paintComponent(g); Graphics2D g2=(Graphics2D) g; //设置绘图质量 g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON); //画一个顶部两个角为圆角，底部两个角为直角的矩形 g2.setColor(Color.white); g2.fillRoundRect(0, 0, 190, 30, 10, 10); g2.fillRect(0, 0, 190, 17); //为该矩形添加边框 //为该矩形添加边框 if(flag){ g2.setStroke(new BasicStroke(2.0f)); g2.setColor(borderc); g2.drawLine(1, 1, 1, 25); g2.drawLine(189, 1, 189, 25); g2.drawLine(1, 1, 190, 1); g2.drawArc(1, 18, 10, 10, 180, 90);//绘制圆弧 g2.drawArc(179, 18, 10, 10, 270, 90);//绘制圆弧 g2.drawLine(5, 29, 185, 29); } else{ g2.setStroke(new BasicStroke(1.0f)); g2.setColor(normalc); g2.drawLine(0, 0, 0, 25); g2.drawLine(189, 0, 189, 25); g2.drawLine(0, 0, 190, 0); g2.drawArc(0, 18, 10, 10, 180, 90);//绘制圆弧 g2.drawArc(179, 18, 10, 10, 270, 90);//绘制圆弧 g2.drawLine(5, 29, 185, 29); } }}
下面的代码就是主窗体了
Demo1:
import java.awt.Color;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent; import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPasswordField;import javax.swing.JTextField; public class Demo1 { public static void main(String[] args) { //初始化窗体 JFrame frame=new JFrame("My QQ"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(300, 200); frame.setLocationRelativeTo(null); frame.setLayout(null); //添加账号面板 AccountPanel accountPanel=new AccountPanel(Color.LIGHT_GRAY,new Color(56,172,239)); accountPanel.setLayout(null); accountPanel.setBounds(30, 15, 190, 30); frame.add( accountPanel); //在账号面板中添加文本框 JTextField accountTF=new JTextField(); accountTF.setBounds(7, 0, 153, 30); accountTF.setOpaque(false); accountTF.setBorder(null); accountPanel.add(accountTF); //在账号面板中的文本框后添加按钮 JButton jb1=new JButton(new ImageIcon( Demo1.class.getClassLoader().getResource("res/images/btn1.png"))); jb1.setBounds(160, 0, 30, 30); jb1.setBorder(null);//取消边框 jb1.setBorderPainted(false);//不绘制按钮边框 jb1.setContentAreaFilled(false);//设置按钮背景透明 jb1.setFocusPainted(false);//设置按钮不绘制焦点状态 accountPanel.add(jb1); //密码面板 PasswordPanel passwordPanel=new PasswordPanel(Color.LIGHT_GRAY,new Color(56,172,239)); passwordPanel.setLayout(null); passwordPanel.setBounds(30, 45, 190, 30); frame.add( passwordPanel); //输入密码文本框 JPasswordField passwordPF=new JPasswordField(); passwordPF.setBounds(7, 0, 153, 30); passwordPF.setOpaque(false); passwordPF.setBorder(null); passwordPanel.add(passwordPF); //在账号面板中的文本框后添加按钮 JButton jb2=new JButton(new ImageIcon( Demo1.class.getClassLoader().getResource("res/images/btn2.png"))); jb2.setBounds(160, 0, 30, 30); jb2.setBorder(null); jb2.setBorderPainted(false); jb2.setContentAreaFilled(false); jb2.setFocusPainted(false); passwordPanel.add(jb2); //为账号输入框添加鼠标监听器 MouseAdapter accountListener=new MouseAdapter(){ @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub accountPanel.setBorder(true); accountPanel.updateUI(); } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub accountPanel.setBorder(false); accountPanel.updateUI(); } }; accountTF.addMouseListener(accountListener); jb1.addMouseListener(accountListener); //为密码输入框添加鼠标监听器 MouseAdapter passwordListener=new MouseAdapter(){ @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub passwordPanel.setBorder(true); passwordPanel.updateUI(); } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub passwordPanel.setBorder(false); passwordPanel.updateUI(); } }; passwordPF.addMouseListener(passwordListener); jb2.addMouseListener(passwordListener); frame.setVisible(true); } }
自此，仿QQ登录账号密码输入框就完成了。
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本文标题: java swing实现QQ账号密码输入框
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