java swing 创建一个简单的QQ界面教程

记录自己用java swing做的第一个简易界面。

LoginAction.java

package com.QQUI0819;import javax.swing.*;import java.awt.event.*;//首先，编写按钮?监听器实现类public class LoginAction implements ActionListener { private int count=0; //当前为null,创建后指向界面输入框 private JTextField ulName; private JTextField ulpass; //创建时，输入界面类中?输入框 public LoginAction(JTextField ulName,JTextField ulpass ){ this.ulName=ulName; this.ulpass=ulpass; } //实现接口中?方法 //当劢作发生时，这个方法执行 public void actionPerformed(ActionEvent e) { //点击时，就取得界面输入框?内容 //此时?jtf，指向是界面上那个输入框 String u=ulName.getText(); String p=ulName.getText(); System.out.println('账号输入的是 '+u); System.out.println('密码输入的是 '+p) if(u.equals('csy123') ||(p.equals('456'))){ //如果输入正确，弹出新界面 JFrame jf=new JFrame(); jf.setTitle('登陆成功'); jf.setSize(300,400); jf.setLocationRelativeTo(null); jf.setVisible(true); } else { //如果输入正确，弹出新界面 JFrame jf=new JFrame(); jf.setTitle('登陆失败'); jf.setSize(300,100); JButton b1 = new JButton('登陆失败，账号和密码不匹配'); jf.add(b1); jf.setLocationRelativeTo(null); jf.setVisible(true); } }}

QQ.java

package com.QQUI0819;import java.awt.Color;import java.awt.Container;import java.awt.Cursor;import java.awt.Font;import java.awt.Image;import java.util.ArrayList;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JCheckBox;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPasswordField;import javax.swing.JRootPane;import javax.swing.JTextField;public class QQ extends JFrame{ //用户名 private JTextField ulName; //密码 private JPasswordField ulPasswd; //小容器 private JLabel j1; private JLabel j2; private JLabel j3; private JLabel j4; //小按钮 private JButton b1; //复选框 private JCheckBox c1; private JCheckBox c2; /** * 初始化QQ登录页面 * */ public QQ(){ //设置登录窗口标题 this.setTitle('QQ登录'); //去掉窗口的装饰(边框) //采用指定的窗口装饰风格 this.getRootPane().setWindowDecorationStyle(JRootPane.NONE); //窗体组件初始化 init(); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //设置布局为绝对定位 this.setLayout(null); this.setBounds(0, 0, 355, 265); //设置窗体的图标 Image img0 = new ImageIcon('E:蓝杰培训第一周java基础basicStudysrccomQQUI0819QQlogo.jpg').getImage(); this.setIconImage(img0); //窗体大小不能改变 this.setResizable(false); //居中显示 this.setLocationRelativeTo(null); //窗体显示 this.setVisible(true); } /** * 窗体组件初始化 * */ public void init(){ //创建一个容器,其中的图片大小和setBounds Container container = this.getContentPane(); j1 = new JLabel(); //设置背景色 Image img1 = new ImageIcon('E:蓝杰培训第一周java基础basicStudysrccomQQUI0819QQ.jpg').getImage(); j1.setIcon(new ImageIcon(img1)); j1.setBounds(0, 0, 355, 90); //qq头像设定 j2 = new JLabel(); Image img2 = new ImageIcon('E:蓝杰培训第一周java基础basicStudysrccomQQUI0819QQlogo.jpg').getImage(); j2.setIcon(new ImageIcon(img2)); j2.setBounds(20, 100, 60, 63); //用户名输入框 ulName = new JTextField(); ulName.setBounds(100, 100, 150, 20); //注册账号 j3 = new JLabel('注册账号'); j3.setBounds(260, 100, 70, 20); //密码输入框 ulPasswd = new JPasswordField(); ulPasswd.setBounds(100, 130, 150, 20); //找回密码 j4= new JLabel('找回密码'); j4.setBounds(260, 130, 70, 20); //记住密码 c1 = new JCheckBox('记住密码'); c1.setBounds(105, 155, 80, 15); //自动登陆 c2 = new JCheckBox('自动登陆'); c2.setBounds(185, 155, 80, 15); //登陆按钮 b1 = new JButton('登录'); //设置字体和颜色和手形指针 b1.setFont(new Font('宋体', Font.PLAIN, 12)); b1.setForeground(Color.black); b1.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR)); b1.setBounds(20, 200, 300, 20); //给按钮添加 //所有组件用容器装载 this.add(j1); this.add(j2); this.add(j3); this.add(j4); this.add(c1); this.add(c2); this.add(b1); //创建监听器对象，?约痈?磁 LoginAction lo=new LoginAction(ulName,ulPasswd); b1.addActionListener(lo); container.add(j1); container.add(ulName); container.add(ulPasswd); } public static void main(String[] args) { new QQ(); }}

效果图

素材

logo:

QQ logo:

补充知识：创建一个简单的Java Swing登入窗口

连接数据图就不弄了，要连接数据库的自行添加

为了方便排版，Layout用SpringLayout类型

1.账号框采用JTextField 类型

2.密码框采用JPasswordField类型

两者的区别是：

JPasswordField显示的文本是这样的：

文本框JTextField显示的文本是这样的：

3.建立两个JButton，一个是“登入”按钮，另一个是“重置”按钮

4.建立两个Checkbox：一个是记住密码，另一个是隐身登入

5.最后一步加入背景图

代码：

package l;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Container;import java.awt.EventQueue;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.border.EmptyBorder;import javax.swing.SpringLayout;import javax.swing.JLabel;import java.awt.Font;import javax.swing.JTextField;import javax.swing.JPasswordField;import javax.swing.ImageIcon;import javax.swing.JButton;import java.awt.event.FocusAdapter;import java.awt.event.FocusEvent;import javax.swing.JLayeredPane;import java.awt.Checkbox;public class Login extends JFrame { private JPanel contentPane; private JTextField textField; private JPasswordField passwordField; public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() {try { Login frame = new Login(); frame.setVisible(true); //窗口可见 frame.setResizable(false); //设置登入窗口不能调整大小 ImageIcon img = new ImageIcon('d:/img.jpg');//这是背景图片 JLabel imgLabel = new JLabel(img);//将背景图放在标签里。 frame.getLayeredPane().add(imgLabel, new Integer(Integer.MIN_VALUE));imgLabel.setBounds(0,0,img.getIconWidth(), img.getIconHeight()); Container cp=frame.getContentPane(); ((JPanel)cp).setOpaque(false);} catch (Exception e) { e.printStackTrace();} } }); } public Login() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 450, 300); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); SpringLayout sl_contentPane = new SpringLayout(); contentPane.setLayout(sl_contentPane);JLabel lblNewLabel = new JLabel('账号：'); lblNewLabel.setFont(new Font('黑体', Font.PLAIN, 19)); sl_contentPane.putConstraint(SpringLayout.NORTH, lblNewLabel, 34, SpringLayout.NORTH, contentPane); sl_contentPane.putConstraint(SpringLayout.WEST, lblNewLabel, 41, SpringLayout.WEST, contentPane); contentPane.add(lblNewLabel);JLabel lblNewLabel_1 = new JLabel('密码：'); lblNewLabel_1.setFont(new Font('黑体', Font.PLAIN, 19)); sl_contentPane.putConstraint(SpringLayout.NORTH, lblNewLabel_1, 29, SpringLayout.SOUTH, lblNewLabel); sl_contentPane.putConstraint(SpringLayout.WEST, lblNewLabel_1, 0, SpringLayout.WEST, lblNewLabel); contentPane.add(lblNewLabel_1);textField = new JTextField(); textField.addFocusListener(new FocusAdapter() { @Override public void focusLost(FocusEvent e) {String temp=textField.getText();if(temp.equals('')) { textField.setForeground(Color.GRAY); //JTextField提示输入QQ号 textField.setText('请输入QQ号');} } public void focusGained(FocusEvent e) {String temp=textField.getText();if(temp.equals('请输入QQ号')) { textField.setText('');} } }); sl_contentPane.putConstraint(SpringLayout.NORTH, textField, 1, SpringLayout.NORTH, lblNewLabel); sl_contentPane.putConstraint(SpringLayout.WEST, textField, 52, SpringLayout.EAST, lblNewLabel); sl_contentPane.putConstraint(SpringLayout.EAST, textField, 196, SpringLayout.EAST, lblNewLabel); contentPane.add(textField); textField.setColumns(10);passwordField = new JPasswordField(); sl_contentPane.putConstraint(SpringLayout.NORTH, passwordField, 26, SpringLayout.SOUTH, textField); sl_contentPane.putConstraint(SpringLayout.WEST, passwordField, 52, SpringLayout.EAST, lblNewLabel_1); sl_contentPane.putConstraint(SpringLayout.SOUTH, passwordField, 48, SpringLayout.SOUTH, textField); sl_contentPane.putConstraint(SpringLayout.EAST, passwordField, 201, SpringLayout.EAST, lblNewLabel_1); contentPane.add(passwordField);JButton btnNewButton = new JButton('登入'); sl_contentPane.putConstraint(SpringLayout.SOUTH, btnNewButton, 65, SpringLayout.SOUTH, passwordField); contentPane.add(btnNewButton);JButton button = new JButton('重置'); sl_contentPane.putConstraint(SpringLayout.NORTH, btnNewButton, 2, SpringLayout.NORTH, button); sl_contentPane.putConstraint(SpringLayout.EAST, btnNewButton, -70, SpringLayout.WEST, button); sl_contentPane.putConstraint(SpringLayout.NORTH, button, 32, SpringLayout.SOUTH, passwordField); sl_contentPane.putConstraint(SpringLayout.WEST, button, 242, SpringLayout.WEST, contentPane); button.setFont(new Font('宋体', Font.PLAIN, 19)); contentPane.add(button);Checkbox checkbox = new Checkbox('记住密码'); sl_contentPane.putConstraint(SpringLayout.WEST, checkbox, 0, SpringLayout.WEST, textField); sl_contentPane.putConstraint(SpringLayout.SOUTH, checkbox, -6, SpringLayout.NORTH, btnNewButton); contentPane.add(checkbox);Checkbox checkbox_1 = new Checkbox('隐身登入'); sl_contentPane.putConstraint(SpringLayout.WEST, checkbox_1, 35, SpringLayout.EAST, checkbox); sl_contentPane.putConstraint(SpringLayout.SOUTH, checkbox_1, 0, SpringLayout.SOUTH, checkbox); contentPane.add(checkbox_1); }}

运行截图：

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