How can you use file choosers and color choosers in Swing? Explain with suitable example,

Using/ Creating Color Choosers

We can use JColorChooser class to enable users to choose from a palette of colors. A color chooser is a component that we can place anywhere within our program GUI. The JColorChooser API also makes it easy to bring up a model or non-modal dialog that contains a color-chooser. We can create color-chooser using any one of the following constructors:

JColor Chooser();

JColor Chooser(intial_color);

Once an object of JColorChooser class is created, we can display it in a dialog box by calling its show Dialog() method. Signature of this method is as below:

 Color show Dialog(parent, title, intial_color)

Example

import javax.swing.*;

import java.awt.*;

import java.awt.event. *;

class DialogDemo extends JFrame

{

JColorChooser cc;

JPanel p;

JDialog d;

DialogDemo()

{

setSize(700, 500);

setDefault LokAnd FeelDecorated (true);

setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

setTitle("Paraent Frame");

p-new JPanel();

add (p);

setVisible(true);

cc = new JColorChooser();

Color c=cc.showDialog (this, "Select new color....", Color.white);

p.setBackground (c);

}

public static void main(String args[])

{

DialogDemo frame=new DialogDemo();

}

}

Using/Creating File Choosers

File choosers provide a GUI for navigating the file system, and then either choosing a file or directory from a list, or entering the name of a file or directory. We can add it at any location of our GUL To display a file chooser in modal dialog box we usually use the JFileChooser API. We can create file choosers by using any one of the following constructors:

JFileChooser()

JFile Chooser(file_object)

FileChooser(initial_path)

Once an object of JColorChooser class is created, we can display it in a dialog box by calling its show Dialog() or showOpenDialog() or showSave Dialog() methods. Signature of these methods is as below:

int show Open Dialog(parent)

int showSaveDialog(parent)

int show Dialog(parent,title)

Example

import javax.swing.*;

import java.awt.";

import java.awt.event.*;

class DialogDemo extends JFrame

{

fileDialog;

FileChooser

JPanel p;

DialogDemo ()

{

setSize(700, 500);

setDefaultLookAndFeelDecorated (true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setTitle("Paraent Frame");

setVisible (true);

fileDialog= new JFileChooser();

fileDialog.showOpenDialog(this);

}

public static void main(String args[])

{

DialogDemo frame=new DialogDemo();

}

}