将SQLite数据库内嵌到Java程序中，用JavaSwing编写可以对数据库中某表进行增加字段，查找全部信息操作

要将SQLite数据库内嵌到Java程序中，需要使用SQLite JDBC驱动程序。以下是一个基本的示例代码，演示如何连接到SQLite数据库并执行查询操作：

import java.sql.*;

public class SQLiteJDBCExample {
   public static void main( String args[] ) {
      Connection c = null;
      Statement stmt = null;
      try {
         Class.forName("org.sqlite.JDBC");
         c = DriverManager.getConnection("jdbc:sqlite:test.db");
         System.out.println("Opened database successfully");

         stmt = c.createStatement();
         ResultSet rs = stmt.executeQuery( "SELECT * FROM COMPANY;" );
         while ( rs.next() ) {
            int id = rs.getInt("id");
            String  name = rs.getString("name");
            int age  = rs.getInt("age");
            String  address = rs.getString("address");
            float salary = rs.getFloat("salary");
            System.out.println( "ID = " + id );
            System.out.println( "NAME = " + name );
            System.out.println( "AGE = " + age );
            System.out.println( "ADDRESS = " + address );
            System.out.println( "SALARY = " + salary );
            System.out.println();
         }
         rs.close();
         stmt.close();
         c.close();
      } catch ( Exception e ) {
         System.err.println( e.getClass().getName() + ": " + e.getMessage() );
         System.exit(0);
      }
   }
}

在此示例中，我们使用了`org.sqlite.JDBC`驱动程序，连接到SQLite数据库。我们打开了一个名为“test.db”的数据库，并用`stmt.executeQuery()`方法执行了一个查询，返回了一个结果集。

要编写JavaSwing界面，我们可以使用Swing组件来创建一个可视化的用户界面。以下是一个简单的示例代码，演示如何创建一个包含“增加字段”和“查找全部信息”操作的UI界面：

import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.swing.*;

public class SQLiteSwingExample {
   private JFrame mainFrame;
   private JLabel headerLabel;
   private JLabel statusLabel;
   private JPanel controlPanel;

   public SQLiteSwingExample(){
      prepareGUI();
   }

   public static void main(String[] args){
      SQLiteSwingExample  swingControlDemo = new SQLiteSwingExample();      
      swingControlDemo.showEventDemo();       
   }

   private void prepareGUI(){
      mainFrame = new JFrame("Java Swing Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));

      headerLabel = new JLabel("",JLabel.CENTER );
      statusLabel = new JLabel("",JLabel.CENTER);        

      statusLabel.setSize(350,100);
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      controlPanel = new JPanel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }

   private void showEventDemo(){
      headerLabel.setText("Control in action: Button"); 

      JButton addButton = new JButton("Add Field");
      JButton viewButton = new JButton("View All");

      addButton.setActionCommand("Add");
      viewButton.setActionCommand("View");

      addButton.addActionListener(new ButtonClickListener()); 
      viewButton.addActionListener(new ButtonClickListener()); 

      controlPanel.add(addButton);
      controlPanel.add(viewButton);       

      mainFrame.setVisible(true);  
   }

   private class ButtonClickListener implements ActionListener{
      public void actionPerformed(ActionEvent e) {
         String command = e.getActionCommand();  

         if( command.equals( "Add" ))  {
            addField();
         } else if( command.equals( "View" ) )  {
            viewAll();
         }
      }        
   }

   private void addField(){
      JFrame addFrame = new JFrame("Add Field");
      JPanel panel = new JPanel(new GridLayout(3, 2));
      JLabel nameLabel = new JLabel("Name:");
      JLabel typeLabel = new JLabel("Type:");
      JTextField nameField = new JTextField(20);
      JTextField typeField = new JTextField(20);

      panel.add(nameLabel);
      panel.add(nameField);
      panel.add(typeLabel);
      panel.add(typeField);

      int result = JOptionPane.showConfirmDialog(addFrame, panel, "Add Field", JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
      if (result == JOptionPane.OK_OPTION) {
        try {
            Class.forName("org.sqlite.JDBC");
            Connection c = DriverManager.getConnection("jdbc:sqlite:test.db");
            Statement stmt = c.createStatement();
            String sql = "ALTER TABLE COMPANY ADD COLUMN " + nameField.getText() + " " + typeField.getText();
            stmt.executeUpdate(sql);
            stmt.close();
            c.close();
         } catch ( Exception e ) {
            System.err.println( e.getClass().getName() + ": " + e.getMessage() );
            System.exit(0);
         }
         statusLabel.setText("Added field " + nameField.getText() + " of type " + typeField.getText());
      }
   }

   private void viewAll(){
      JFrame viewFrame = new JFrame("View All");
      JPanel panel = new JPanel(new BorderLayout());
      JTextArea textArea = new JTextArea();
      textArea.setEditable(false);
      panel.add(textArea, BorderLayout.CENTER);

      try {
         Class.forName("org.sqlite.JDBC");
         Connection c = DriverManager.getConnection("jdbc:sqlite:test.db");
         Statement stmt = c.createStatement();
         ResultSet rs = stmt.executeQuery( "SELECT * FROM COMPANY;" );
         while ( rs.next() ) {
            int id = rs.getInt("id");
            String  name = rs.getString("name");
            int age  = rs.getInt("age");
            String  address = rs.getString("address");
            float salary = rs.getFloat("salary");
            textArea.append("ID = " + id + "\n");
            textArea.append("NAME = " + name + "\n");
            textArea.append("AGE = " + age + "\n");
            textArea.append("ADDRESS = " + address + "\n");
            textArea.append("SALARY = " + salary + "\n\n");
         }
         rs.close();
         stmt.close();
         c.close();
      } catch ( Exception e ) {
         System.err.println( e.getClass().getName() + ": " + e.getMessage() );
         System.exit(0);
      }

      JScrollPane scrollPane = new JScrollPane(panel);
      viewFrame.setContentPane(scrollPane);
      viewFrame.pack();
      viewFrame.setVisible(true);
   }
}

在此示例中，我们创建了一个包含两个按钮的UI界面，“增加字段”和“查找全部信息”。当用户单击“添加”按钮时，我们创建了一个新的JFrame，并显示了一个包含文本框和标签的面板，以允许用户输入新字段的名称和类型。然后，我们使用`ALTER TABLE`语句向数据库中添加新字段，并将结果显示在状态标签中。

当用户单击“查看全部”按钮时，我们创建了一个新的JFrame，并显示了一个包含文本区域的面板，以显示从数据库中检索的所有行。我们使用与之前相同的方法与数据库进行连接，并使用`SELECT`查询检索所有行。然后，我们将每一行的数据添加到文本区域中。

这只是一个基本示例，你可以根据自己的需求进行修改和扩展。