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View Full Version : [SOLVED] Calling frames/windows (java) (code included)



JayKay3000
January 15th, 2010, 01:09 AM
Well guys and girls i'm stuck and I hope you can help.

I'm having some trouble trying to call a different window/frame/whatever technical term is.

I decided to use some sample code from a book.

The normal way I load windows i first create a static method (Menu being the place starter point/loging point to the prog (i've ommited most of the other code):



public class Menu extends JFrame implements ActionListener {
private static CurrentVersion window1;Then at the bottom of the page I call to load each window and set them up on the screen.


public static void main(String[] args) {
Menu mymenu = new Menu();

for creating the Current Network Version window
window1 = new CurrentVersion("Modify The Network Plan");
Toolkit theKit1 = window1.getToolkit();
window1.setVisible(false);
Dimension wndSize1 = theKit1.getScreenSize();
window1.setBounds(wndSize1.width/4, wndSize1.height/4, // Position
wndSize1.width/2, wndSize1.height/2); // Size

//for creating the Compare window
window2 = new Compare("Compare");
Toolkit theKit2 = window2.getToolkit();
window2.setVisible(false);
Dimension wndSize2 = theKit2.getScreenSize();
window2.setBounds(wndSize2.width/500, wndSize2.height/4, // Position
wndSize2.width/1, wndSize2.height/2); // Size

//for creating the Changes window
window3 = new Changes("Changes");
Toolkit theKit3 = window3.getToolkit();
window3.setVisible(false);
Dimension wndSize3 = theKit3.getScreenSize();
window3.setBounds(wndSize3.width/4, wndSize3.height/4, // Position
wndSize3.width/2, wndSize3.height/2); // Size

//for creating the Backup window
window4 = new Backup("Backup");
Toolkit theKit4 = window4.getToolkit();
window4.setVisible(false);
Dimension wndSize4 = theKit4.getScreenSize();
window4.setBounds(wndSize4.width/4, wndSize4.height/4, // Position
wndSize4.width/2, wndSize4.height/2); // Size
Then when I want a menu item I call it from the menu by simply setting it to not visible:



modify.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
window1.setVisible(true);
}
});
So...

Below is the "Current Version" code for letting you do sql queries, this code runs fine as standalone but I can't seem to integrate it into my main Menu class (java file). It simply says "cannot find symbol, window1 = new Current Version("Modify the newtork plan");. Bear in mind i've had this file run perfectly find using a bit of code that simply displays everything from a database.


import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.Statement;
import java.sql.SQLException;

public class CurrentVersion extends JFrame implements ActionListener {
public static void main(String[] args) {
// Set default values for the command line args
String user = "guest";
String password = "guest";
String url = "jdbc:odbc:technical_library";
String driver = "sun.jdbc.odbc.JdbcOdbcDriver";

// Up to 4 arguments in the sequence database url,driver url, user ID, password
switch(args.length) {
case 4: // Start here for four arguments
password = args[3];
// Fall through to the next case
case 3: // Start here for three arguments
user = args[2];
// Fall through to the next case
case 2: // Start here for two arguments
driver = args[1];
// Fall through to the next case
case 1: // Start here for one argument
url = args[0];

CurrentVersion theApp = new CurrentVersion(driver, url, user, password);
}
}

public CurrentVersion(String driver, String url,
String user , String password) {

JFrame frame = new JFrame();
// super("CurrentVersion"); // Call base constructor
// setBounds(0, 0, 400, 300); // Set window bounds
frame.setDefaultCloseOperation(DISPOSE_ON_CLOSE); // Close window operation
// addWindowListener(new WindowAdapter() { // Listener for window close
// Handler for window closing event
// public void windowClosing(WindowEvent e) {
// dispose(); // Release the window resources
// System.exit(0); // End the application
// }
// } );

// Add the input for SQL statements at the top
command.setToolTipText("Key SQL commmand and press Enter");
getContentPane().add(command, BorderLayout.NORTH);

// Add the status reporting area at the bottom
status.setLineWrap(true);
status.setWrapStyleWord(true);
getContentPane().add(status, BorderLayout.SOUTH);

// Create the menubar from the menu items
JMenu fileMenu = new JMenu("File"); // Create File menu
fileMenu.setMnemonic('F'); // Create shortcut
fileMenu.add(clearQueryItem); // Add clear query item
fileMenu.add(exitItem); // Add exit item
menuBar.add(fileMenu); // Add menu to the menubar
setJMenuBar(menuBar); // Add menubar to the window

// Add listeners for text field and menu items
command.addActionListener(this);
clearQueryItem.addActionListener(this);
exitItem.addActionListener(this);

// Establish a database connection and set up the table
try {
Class.forName(driver); // Load the driver
connection = DriverManager.getConnection(url, user, password);
statement = connection.createStatement();

model = new ResultsModel1(); // Create a table model
JTable table = new JTable(model); // Create a table from the model
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); // Use scrollbars
resultsPane = new JScrollPane(table); // Create scrollpane for table
getContentPane().add(resultsPane, BorderLayout.CENTER);
} catch(ClassNotFoundException cnfe) {
System.err.println(cnfe); // Driver not found
} catch(SQLException sqle) {
System.err.println(sqle); // error connection to database
}
pack();
frame.setVisible(true);
}

// Handles action events for menu items and the text field
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
if(source == command) { // Enter key for text field input
executeSQL();
} else if(source == clearQueryItem) { // Clear query menu item
command.setText(""); // Clear SQL entry
} else if(source == exitItem) { // Exit menu item
dispose(); // Release the window resources
System.exit(0); // End the application
}
}

// Executes an SQL command entered in the text field
public void executeSQL() {
String query = command.getText(); // Get the SQL statement
if(query == null||query.length() == 0) { // If there's nothing we are done
return;
}
try {
model.setResultSet(statement.executeQuery(query));
status.setText("Resultset has " + model.getRowCount() + " rows.");
} catch (SQLException sqle) {
status.setText(sqle.getMessage()); // Display error message
}
}

JTextField command = new JTextField(); // Input area for SQL
JTextArea status = new JTextArea(3,1); // Output area for status and errors
JScrollPane resultsPane;

private JMenuBar menuBar = new JMenuBar(); // The menu bar
JMenuItem clearQueryItem = new JMenuItem("Clear query"); // Clear SQL item
JMenuItem exitItem = new JMenuItem("Exit"); // Exit item

Connection connection; // Connection to the database
Statement statement; // Statement object for queries
ResultsModel1 model; // Table model for resultset
}

So that's my prob. I did take out the case parts and then got told the method was not abstract. I'm at a loss as to how to show this window using my current system.

Have plans to build on this code once I get initial intergration done.

Suggestions are welcome. Preferable usefull ones. I don't know of any other way to call a window as this is the only way i've ever done it.

Axos
January 15th, 2010, 02:24 AM
I admit I have not tried to fully understand what you are trying to do but one problem I can see is you are trying to call a constructor which doesn't exist:

window1 = new CurrentVersion("Modify The Network Plan");

Whereas the only constructor you have in the code you posted is:

public CurrentVersion(String driver, String url,
String user , String password)

...unless I'm overlooking something.

JayKay3000
January 15th, 2010, 03:58 PM
Thanks for pointing me in the right direction. You saved me a load of time.

So after 15 min of fiddling with that constructor it now works just like all of the rest in the program


Cheers again