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Code in Java, please

Question:

FileMenuHandler.java:

SampleGUI.java:

SampleMain.java:

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This solution was written by a subject matter expert. It's designed to help students like you learn core concepts.

Anonymous answered this668 answers

package Packk;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class FileMenuHandler implements ActionListener //define the class FileMenuHanlder that implements ActionListener
{
JFrame jframe; //declare variable of type JFrame
public FileMenuHandler(JFrame jf) //define constructor for that with JFrame type as a parameter
{
jframe=jf; //initialize jframe type variable
}

@Override
public void actionPerformed(ActionEvent evt) //handle action event here
{
String menuName=evt.getActionCommand(); //returns the commandString associated with menuitem
if(menuName.equalsIgnoreCase("Open")) //if open
{
JOptionPane.showMessageDialog(null, "You clicked Open"); //displays message "You clicked open"
}
else if(menuName.equalsIgnoreCase("Quit")) //if quit
{
JOptionPane.showMessageDialog(null, "You clicked Quit"); //displays message "You clicked quit"
}
}
}
Here i have defined FileMenuHandler class that implements ActionListener interface in which i have defined constructor for that class in that i am initializing the JFrame type variable. And i have also provided implementation for the actionPerformed() method in which i am getting the commandString associated with that menu item and i am checking whether it is equal to Find or Replace and displaying the message for the clicked menu item using JOptionPane.showMessageDialog() method.

package Packk;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class EditMenuHandler implements ActionListener //define the class EditMenuHandler that implements ActionListener
{
JFrame jframe; //declare variable of JFrame type
public EditMenuHandler(JFrame jf) //define constructor with JFrame type parameter
{
jframe=jf; //assign jframe type variable
}

@Override
public void actionPerformed(ActionEvent evt) //define actionPerformed() method
{
String menuName=evt.getActionCommand(); //returns the commandString associated with that menu item

if(menuName.equalsIgnoreCase("Find")) //if menuName equals "Find"
{
JOptionPane.showMessageDialog(null, "You clicked Find"); //display the message "You clicked Find"
}
else if(menuName.equalsIgnoreCase("Replace")) //if menuName equals "Replace"
{
JOptionPane.showMessageDialog(null, "You clicked Replace"); //displayes message "You clicked replace"
}
}
}
Here i have defined EditMenuHanlder that implements ActionListener and in the constructor of that i have initialized JFrame type variable. And i have provided implementation for actionPerformed() method in which i am getting the command string associated with that menu item and i am checking whether it is a Find menu item or it is a Replace menu item. And i am displaying the message using JOptionPane.showMessageDialog() method for the selected menu item.

package Packk;

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

public class SampleGUI extends JFrame //define the class that extends JFrame class
{
public SampleGUI(String title,int height,int width) //define the constructor for that class
{
setTitle(title); //set the title
setSize(height,width); //set the size
setLocation(400, 200); //set the location
createFileMenu(); //call the createFileMenu() method
setDefaultCloseOperation(EXIT_ON_CLOSE); //call setDefaultCloseOperation() method
setVisible(true); //make frame visible
}

private void createFileMenu() //define createFileMenu() method
{
JMenuItem item; //declare JMenuItem
JMenuBar menuBar=new JMenuBar(); //create the MenuBar
JMenu fileMenu=new JMenu("File"); //create fileMenu
FileMenuHandler fmh=new FileMenuHandler(this); //create FileMenuHandler object

item=new JMenuItem("Open"); //create Open menuItem
item.addActionListener(fmh); //register actionListener with that menuItem
fileMenu.add(item); //add the item to menu

fileMenu.addSeparator(); //add horizontal seperator line

item=new JMenuItem("Quit"); //create Quit menuitem
item.addActionListener(fmh); //register actionListener
fileMenu.add(item); //add item to File menu

setJMenuBar(menuBar); //set the JMenuBar
menuBar.add(fileMenu); //add the fileMenu


JMenu editMenu=new JMenu("Edit"); //create the editMenu
EditMenuHandler emh=new EditMenuHandler(this); //create EditMenuHanlder

item=new JMenuItem("Find"); //create Find menu item
item.addActionListener(emh); //register actionListener
editMenu.add(item); //add item to editMenu

editMenu.addSeparator(); //add horizontal seperator line

item=new JMenuItem("Replace"); //create menuItem replace
item.addActionListener(emh); //register actionListener
editMenu.add(item); //add the item

menuBar.add(editMenu); //add editMenu to menuBar

}
}
Here i have defined SampleGUI class that extends JFrame class in which i have defined constructor with title,width,height as a parameter and in that i have called setTitle() method by passing title to set the title for frame and called setSize() method by passing height and width as a parameter. And i have also called setLocation() mehod to set the location for frame and i have called createFileMenu() method and called setDefaultCloseOperation() method to make the frame closable when the user closes that frame. And i have also called setVisible() method to make the frame visible.

And in the createFileMenu() in which i have created Menubar and i have created FileMenu and i am creating the FileMenuHandler() constructor by passing current object as a parameter. And i am adding open and quit menu items to that File menu and registered handler with that menu items to handle the action event. And then i have also created EditMenu and added the menu items to that editMenu and registered handler with that menu items Find and replace menu items. and After that i have added both menus to menubar.

package Packk;

public class SampleMain //define the Public class
{
static SampleGUI sampleGUI; //declare the SampleGUI variable
public static void main(String[] args) //define main() method
{
sampleGUI=new SampleGUI("My Sample GUI",500,300); //call the constructor
}
}

Here i have defined class SampleMain in which i have declared SampleGUI type variable sampleGUI and defined main() method in which i have called constructor of SampleGUI by passing "My Sample GUI" text as a parameter and at 500,300 location it displays the frame.

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