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AWT FileDialog Class
Introduction
FileDialog control represents a dialog window from which the user can select a file.
Class declaration
Following is the declaration for java.awt.FileDialog class:
public class FileDialog extends Dialog
Field
Following are the fields for java.awt.Image class:
static int LOAD -- This constant value indicates that the purpose of the file dialog window is to locate a file from which to read.
static int SAVE -- This constant value indicates that the purpose of the file dialog window is to locate a file to which to write.
Class constructors
S.N. | Constructor & Description |
---|---|
1 | FileDialog(Dialog parent) Creates a file dialog for loading a file. |
2 | FileDialog(Dialog parent, String title) Creates a file dialog window with the specified title for loading a file. |
3 | FileDialog(Dialog parent, String title, int mode) Creates a file dialog window with the specified title for loading or saving a file. |
4 | FileDialog(Frame parent) Creates a file dialog for loading a file. |
5 | FileDialog(Frame parent, String title) Creates a file dialog window with the specified title for loading a file. |
6 | FileDialog(Frame parent, String title, int mode) Creates a file dialog window with the specified title for loading or saving a file. |
Class methods
S.N. | Method & Description |
---|---|
1 | void addNotify() Creates the file dialog's peer. |
2 | String getDirectory() Gets the directory of this file dialog. |
3 | String getFile() Gets the selected file of this file dialog. |
4 | FilenameFilter getFilenameFilter() Determines this file dialog's filename filter. |
5 | int getMode() Indicates whether this file dialog box is for loading from a file or for saving to a file. |
6 | protected String paramString() Returns a string representing the state of this FileDialog window. |
7 | void setDirectory(String dir) Sets the directory of this file dialog window to be the specified directory. |
8 | void setFile(String file) Sets the selected file for this file dialog window to be the specified file. |
9 | void setFilenameFilter(FilenameFilter filter) Sets the filename filter for this file dialog window to the specified filter. |
10 | void setMode(int mode) Sets the mode of the file dialog. |
Methods inherited
This class inherits methods from the following classes:
java.awt.Dialog
java.awt.Window
java.awt.Component
java.lang.Object
FileDialog Example
Create the following java program using any editor of your choice in say D:/ > AWT > com > tutorialspoint > gui >
AwtControlDemo.javapackage com.tutorialspoint.gui; import java.awt.*; import java.awt.event.*; public class AwtControlDemo { private Frame mainFrame; private Label headerLabel; private Label statusLabel; private Panel controlPanel; public AwtControlDemo(){ prepareGUI(); } public static void main(String[] args){ AwtControlDemo awtControlDemo = new AwtControlDemo(); awtControlDemo.showFileDialogDemo(); } private void prepareGUI(){ mainFrame = new Frame("Java AWT Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); headerLabel = new Label(); headerLabel.setAlignment(Label.CENTER); statusLabel = new Label(); statusLabel.setAlignment(Label.CENTER); statusLabel.setSize(350,100); controlPanel = new Panel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showFileDialogDemo(){ headerLabel.setText("Control in action: FileDialog"); final FileDialog fileDialog = new FileDialog(mainFrame,"Select file"); Button showFileDialogButton = new Button("Open File"); showFileDialogButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { fileDialog.setVisible(true); statusLabel.setText("File Selected :" + fileDialog.getDirectory() + fileDialog.getFile()); } }); controlPanel.add(showFileDialogButton); mainFrame.setVisible(true); } }
Compile the program using command prompt. Go to D:/ > AWT and type the following command.
D:\AWT>javac com\tutorialspoint\gui\AwtControlDemo.java
If no error comes that means compilation is successful. Run the program using following command.
D:\AWT>java com.tutorialspoint.gui.AwtControlDemo
Verify the following output
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