Übergabe von Werten von Jframe zu einem anderen

Question

Ich habe zwei Jframes und möchte Werte von Jpanel von der ersten Jframe zu einer SQL-Abfrage in der zweiten Jframe übergeben.

package gestioner; 

import java.awt.BorderLayout; 
import java.awt.EventQueue; 

import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.border.EmptyBorder; 
import javax.swing.table.DefaultTableCellRenderer; 

import net.proteanit.sql.DbUtils; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JTextField; 
import javax.swing.JButton; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import java.awt.event.ActionListener; 
import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.awt.event.ActionEvent; 
import java.awt.event.MouseAdapter; 
import java.awt.event.MouseEvent; 
import java.awt.event.KeyAdapter; 
import java.awt.event.KeyEvent; 

public class Customers extends JFrame { 

private JPanel contentPane; 
private JLabel lblFullName; 
private JTextField funame; 
private JLabel lblEmail; 
private JTextField email; 
private JLabel lblAdresse; 
private JTextField adresse; 
private JLabel lblTel; 
private JTextField tel; 
private JButton button; 
private JButton button_1; 
private JButton button_2; 
private JButton btnShowAll; 
private JLabel label_4; 
private JTextField search; 
private JTable table; 
private JScrollPane scrollPane; 

/** 
* Launch the application. 
*/ 
public static void main(String[] args) { 
    EventQueue.invokeLater(new Runnable() { 
     public void run() { 
      try { 
       Customers frame = new Customers(); 
       frame.setVisible(true); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 
    }); 
} 

Connection con = null; 
PreparedStatement pst = null; 
ResultSet rs = null; 
public JLabel id; 
private JButton btnSales; 

public String getLab() { 
    // String z =funame.getText(); 
    return funame.getText(); 
} 

public void fillTable() { 

    try { 
     String query = "select * from customers"; 
     pst = con.prepareStatement(query); 
     rs = pst.executeQuery(); 
     table.setModel(DbUtils.resultSetToTableModel(rs)); 

     // center allignment 
     ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()) 
       .setHorizontalAlignment((int) JLabel.CENTER_ALIGNMENT); 
     DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer(); 
     centerRenderer.setHorizontalAlignment(JLabel.CENTER); 
     table.getColumnModel().getColumn(0).setCellRenderer(centerRenderer); 
     for (int x = 0; x < table.getColumnCount(); x++) { 
      table.getColumnModel().getColumn(x).setCellRenderer(centerRenderer); 
     } 

    } catch (Exception ex) { 

     JOptionPane.showMessageDialog(this, ex.getMessage()); 
    } 

} 

public Customers() { 

    con = Connectdb.connect(); 

    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 
    setBounds(100, 100, 867, 492); 
    contentPane = new JPanel(); 
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); 
    setContentPane(contentPane); 
    contentPane.setLayout(null); 

    lblFullName = new JLabel("Full Name"); 
    lblFullName.setBounds(20, 92, 78, 14); 
    contentPane.add(lblFullName); 

    funame = new JTextField(); 
    funame.setColumns(10); 
    funame.setBounds(116, 89, 125, 20); 
    contentPane.add(funame); 

    lblEmail = new JLabel("Email"); 
    lblEmail.setBounds(20, 120, 78, 14); 
    contentPane.add(lblEmail); 

    email = new JTextField(); 
    email.setColumns(10); 
    email.setBounds(116, 117, 125, 20); 
    contentPane.add(email); 

    lblAdresse = new JLabel("Adresse"); 
    lblAdresse.setBounds(20, 148, 78, 14); 
    contentPane.add(lblAdresse); 

    adresse = new JTextField(); 
    adresse.setColumns(10); 
    adresse.setBounds(116, 145, 125, 20); 
    contentPane.add(adresse); 

    lblTel = new JLabel("Tel"); 
    lblTel.setBounds(20, 176, 78, 14); 
    contentPane.add(lblTel); 

    tel = new JTextField(); 
    tel.setColumns(10); 
    tel.setBounds(116, 173, 125, 20); 
    contentPane.add(tel); 

    button = new JButton("Add"); 
    button.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "Insert into customers (fullname,email,adress,tele) values (?,?,?,?)"; 
       pst = con.prepareStatement(query); 
       pst.setString(1, funame.getText()); 
       pst.setString(2, email.getText()); 
       pst.setString(3, adresse.getText()); 
       pst.setString(4, tel.getText()); 
       pst.execute(); 
       fillTable(); 
       funame.setText(""); 
       email.setText(""); 
       adresse.setText(""); 
       tel.setText(""); 
       id.setText(""); 

      } catch (Exception ex) { 

       JOptionPane.showMessageDialog(null, ex.getMessage()); 
      } 

     } 
    }); 
    button.setBounds(20, 213, 89, 23); 
    contentPane.add(button); 

    button_1 = new JButton("Edit"); 
    button_1.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "update customers set fullname= '" + funame.getText() + "' , email= '" 
         + email.getText() + "' , adress= '" + adresse.getText() + "', tele= '" + tel.getText() 
         + "' where id= '" + id.getText() + "' "; 
       pst = con.prepareStatement(query); 

       // pst.setString(1, funame.getText()); 
       // pst.setString(2, email.getText()); 
       // pst.setString(3, adresse.getText()); 
       // pst.setString(4, tel.getText()); 
       pst.execute(); 
       fillTable(); 

       funame.setText(""); 
       email.setText(""); 
       adresse.setText(""); 
       tel.setText(""); 
       id.setText(""); 

      } catch (Exception ex) { 
       JOptionPane.showMessageDialog(null, ex.getMessage()); 
      } 

     } 
    }); 
    button_1.setBounds(152, 213, 89, 23); 
    contentPane.add(button_1); 

    button_2 = new JButton("Delete"); 
    button_2.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "delete from customers where id='" + id.getText() + "'"; 
       pst = con.prepareStatement(query); 
       pst.execute(); 
       fillTable(); 
       funame.setText(""); 
       adresse.setText(""); 
       tel.setText(""); 
       email.setText(""); 
       id.setText(""); 

      } catch (Exception ex) { 
       JOptionPane.showMessageDialog(null, ex.getMessage()); 
      } 

     } 
    }); 
    button_2.setBounds(20, 247, 89, 23); 
    contentPane.add(button_2); 

    btnShowAll = new JButton("Show All"); 
    btnShowAll.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "select * from customers"; 
       pst = con.prepareStatement(query); 
       rs = pst.executeQuery(); 
       table.setModel(DbUtils.resultSetToTableModel(rs)); 

       ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()) 
         .setHorizontalAlignment((int) JLabel.CENTER_ALIGNMENT); 
       DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer(); 
       centerRenderer.setHorizontalAlignment(JLabel.CENTER); 
       table.getColumnModel().getColumn(0).setCellRenderer(centerRenderer); 
       for (int x = 0; x < table.getColumnCount(); x++) { 
        table.getColumnModel().getColumn(x).setCellRenderer(centerRenderer); 
       } 

       pst.close(); 
       rs.close(); 

      } catch (Exception ex) { 

       JOptionPane.showMessageDialog(null, ex.getMessage()); 

      } 

     } 
    }); 
    btnShowAll.setBounds(733, 386, 89, 23); 
    contentPane.add(btnShowAll); 

    label_4 = new JLabel("Search"); 
    label_4.setBounds(647, 35, 61, 14); 
    contentPane.add(label_4); 

    search = new JTextField(); 
    search.addKeyListener(new KeyAdapter() { 
     @Override 
     public void keyReleased(KeyEvent arg0) { 

      try { 

       if (search.getText().equals("")) { 
        fillTable(); 
       } else { 
        String query = "select * from customers where id like ? or fullname like ? or tele like ? "; 
        pst = con.prepareStatement(query); 
        pst.setString(1, search.getText() + "%"); 
        pst.setString(2, search.getText() + "%"); 
        pst.setString(3, search.getText() + "%"); 
        rs = pst.executeQuery(); 
        table.setModel(DbUtils.resultSetToTableModel(rs)); 
       } 

      } catch (Exception e) { 
       JOptionPane.showMessageDialog(null, e.getMessage()); 
      } 

     } 
    }); 
    search.setColumns(10); 
    search.setBounds(699, 32, 123, 20); 
    contentPane.add(search); 

    scrollPane = new JScrollPane(); 
    scrollPane.setBounds(271, 62, 551, 309); 
    contentPane.add(scrollPane); 

    table = new JTable(); 
    table.addMouseListener(new MouseAdapter() { 
     @Override 
     public void mouseClicked(MouseEvent e) { 

      try { 

       int row = table.getSelectedRow(); 
       String table_click = table.getModel().getValueAt(row, 0).toString(); 
       String query = "select * from customers where id= '" + table_click + "'"; 
       pst = con.prepareStatement(query); 
       rs = pst.executeQuery(); 

       if (rs.next()) { 
        String add1 = rs.getString("id"); 
        id.setText(add1); 
        String add2 = rs.getString("fullname"); 
        funame.setText(add2); 
        String add3 = rs.getString("email"); 
        email.setText(add3); 
        String add4 = rs.getString("adress"); 
        adresse.setText(add4); 
        String add5 = rs.getString("tele"); 
        tel.setText(add5); 

       } 

      } catch (Exception ex) { 

       JOptionPane.showMessageDialog(null, ex.getMessage()); 
      } 

     } 
    }); 
    scrollPane.setViewportView(table); 

    id = new JLabel(""); 
    id.setBounds(116, 64, 125, 14); 
    contentPane.add(id); 

    btnSales = new JButton("Sales"); 
    btnSales.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      new Showsales().setVisible(true); 

     } 
    }); 
    btnSales.setBounds(152, 247, 89, 23); 
    contentPane.add(btnSales); 
} 

} 

die zweite JFrame

package gestioner; 

import java.awt.BorderLayout; 
import java.awt.EventQueue; 

import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JPanel; 
import javax.swing.border.EmptyBorder; 
import javax.swing.table.DefaultTableCellRenderer; 

import net.proteanit.sql.DbUtils; 

import javax.swing.JTable; 
import javax.swing.JScrollPane; 
import javax.swing.JButton; 
import java.awt.event.ActionListener; 
import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.awt.event.ActionEvent; 
import javax.swing.JTextField; 

public class Showsales extends JFrame { 

private JPanel contentPane; 
private JTable table; 
private JScrollPane scrollPane; 
private JButton btnShowAll; 

/** 
* Launch the application. 
*/ 
public static void main(String[] args) { 
    EventQueue.invokeLater(new Runnable() { 
     public void run() { 
      try { 
       Showsales frame = new Showsales(); 
       frame.setVisible(true); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 
    }); 
} 

Connection con = null; 
PreparedStatement pst = null; 
ResultSet rs = null; 
private JLabel lblSearch; 
private JTextField search; 

public void fillTable() { 

    try { 

     String query = "select * from sales where customerid="; 
     pst = con.prepareStatement(query); 
     rs = pst.executeQuery(); 
     table.setModel(DbUtils.resultSetToTableModel(rs)); 

     ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()) 
       .setHorizontalAlignment((int) JLabel.CENTER_ALIGNMENT); 
     DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer(); 
     centerRenderer.setHorizontalAlignment(JLabel.CENTER); 
     table.getColumnModel().getColumn(0).setCellRenderer(centerRenderer); 
     for (int x = 0; x < table.getColumnCount(); x++) { 
      table.getColumnModel().getColumn(x).setCellRenderer(centerRenderer); 
     } 

     pst.close(); 
     rs.close(); 

    } catch (Exception ex) { 

     JOptionPane.showMessageDialog(null, ex.getMessage()); 

    } 

} 

public Showsales() { 

    con = Connectdb.connect(); 

    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 
    setBounds(100, 100, 868, 495); 
    contentPane = new JPanel(); 
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); 
    setContentPane(contentPane); 
    contentPane.setLayout(null); 

    scrollPane = new JScrollPane(); 
    scrollPane.setBounds(232, 40, 610, 363); 
    contentPane.add(scrollPane); 

    table = new JTable(); 
    scrollPane.setViewportView(table); 

    btnShowAll = new JButton("Show All"); 
    btnShowAll.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 

      try { 

       String query = "select * from sales"; 
       pst = con.prepareStatement(query); 
       rs = pst.executeQuery(); 
       table.setModel(DbUtils.resultSetToTableModel(rs)); 

       ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()) 
         .setHorizontalAlignment((int) JLabel.CENTER_ALIGNMENT); 
       DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer(); 
       centerRenderer.setHorizontalAlignment(JLabel.CENTER); 
       table.getColumnModel().getColumn(0).setCellRenderer(centerRenderer); 
       for (int x = 0; x < table.getColumnCount(); x++) { 
        table.getColumnModel().getColumn(x).setCellRenderer(centerRenderer); 
       } 

       pst.close(); 
       rs.close(); 

      } catch (Exception ex) { 

       JOptionPane.showMessageDialog(null, ex.getMessage()); 

      } 

     } 
    }); 
    btnShowAll.setBounds(717, 423, 125, 23); 
    contentPane.add(btnShowAll); 

    lblSearch = new JLabel("Search"); 
    lblSearch.setBounds(609, 15, 65, 14); 
    contentPane.add(lblSearch); 

    search = new JTextField(); 
    search.setBounds(684, 12, 158, 20); 
    contentPane.add(search); 
    search.setColumns(10); 
} 

} 

so möchte ich, wenn der Benutzer die Taste Umsatz klicken, nehmen wir den Wert von id-Label und legen Sie sie in einer SQL-Abfrage in der zweiten JFrame:

String = "select * from sales where cusotmerid='"+id+"'"; 

und führen Sie es aus und zeigen Sie die Tabelle automatisch an, wenn Sie auf die Schaltfläche Verkauf klicken.

Answer 1

Haben Sie zwei Anwendungen? Ich sehe zwei Hauptfunktionen in Ihrem Beispielcode, möchten Sie also einen Wert von ersten Jframe in der ersten App an zweite Jframe in anderen übergeben? Wenn Sie können Sie auf diese Weise tun, einen Wert von einem JFrame zu anderen in einer Anwendung zu übergeben wollen:

class Frame1 extends JFrame { 
    private JLabel idLabel; 
    public Frame1() { 
     ......... 
     gotoSecondFrame.addActionListener(new ActionListener() { 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       int id = Integer.parseInt(idLabel.getText());// just get id value from jlabel 
       JFrame2 frame = new JFram2(id);// then pass to second jframe 
       frame.setVisible(true);// show second jframe 
      } 
     }); 
     ........ 
    } 
} 

class Frame2 extends JFrame { 
    private void query(int id) { 
     ....... 
    } 
    public Frame2(int id) { 
     ....... 
     query(id);// your query with id which passed from first jframe 
     ....... 
    } 
} 

Answer 2

Sie Wert von FirstJFrame passieren kann mit SecondJFrame Konstruktor

FirstJFrame.java

SecondJFrame

public class FirstJFrame extends javax.swing.JFrame { 

    JButton btn = new JButton("Send Value"); 

    public FirstJFrame() { 

     getContentPane().add(btn); 

    } 
    private void btnActionPerformed(java.awt.event.ActionEvent evt) {             
     SecondJFrame secondFrame = new SecondJFrame(13); 
// 13 is the value 

     secondFrame.setVisible(true); 

    } 
} 

SecondJFrame.java

public class SecondJFrame extends javax.swing.JFrame { 

    int id = 0; 

    public SecondJFrame (int idValue) { 

      int id = idValue; 

      System.out.println(id); 
    } 

}