Question

Design a GUI application as shown below and perform the following tasks: The text field is for data file name, the file extension must be.txt, otherwise, prompt user to provide a valid file name. Load the content of the data file and display on the textarea. 1. 2. Loading Files File Name: data.tt Load File

In Java please, thank you!

Answer 1

1. DocumentViewer.java

import java.awt.BorderLayout;

import java.awt.Font;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.filechooser.FileNameExtensionFilter;

import java.io.File;

class DocumentViewer {

public static void main(String[] args) {

SwingUtilities.invokeLater(new Runnable() {

public void run() {

final JFrame f = new JFrame("Document Viewer");

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

final JFileChooser fileChooser = new JFileChooser();

final FileNameExtensionFilter filter = new FileNameExtensionFilter("TEXT FILES", "txt", "text");

fileChooser.setFileFilter(filter);

JPanel gui = new JPanel(new BorderLayout());

final JEditorPane document = new JEditorPane();

document.setEditable(false);

document.setFont(new Font("Serif", Font.BOLD, 15));

gui.add(new JScrollPane(document), BorderLayout.CENTER);

JButton open = new JButton("Open");

open.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent ae) {

int result = fileChooser.showOpenDialog(f);

if (result == JFileChooser.APPROVE_OPTION) {

File file = fileChooser.getSelectedFile();

try {

document.setPage(file.toURI().toURL());

} catch (Exception e) {

e.printStackTrace();

}

}

}

});

gui.add(open, BorderLayout.NORTH);

f.setContentPane(gui);

f.pack();

f.setSize(700, 700);

f.setLocationByPlatform(true);

f.setVisible(true);

}

});

}

}

The Output is attached below:-

Document Viewer Open Christmas is an annual festival commemorating the birth of Jesus Christ,[8][9] observed primarily on December 2 5[4][10]1] as a religious and cultural celebration among billions of people around the world.[2][12][13] A feast ce ntral to the Christian liturgical year, it is preceded by the season of Advent or the Nativity Fast and initiates the se ason of Christmastide, which historically in the West lasts twelve days and culminates on Twelfth Night;[14] in som e traditions, Christmastide includes an octave.[15] Christmas Day is a public holiday in many of the world's nations [161[171[18] is celebrated religiously by a majority of Christians,[19] as well as culturally by many non-Christians,[ 1][20] and forms an integral part of the holiday season centered around it. The traditional Christmas narrative, the Nativity of Jesus, delineated in the New Testament says that Jesus was bo rn in Bethlehem, in accordance with messianic prophecies.[21] When Joseph and Mary arrived in the city, the inn had no room and so they were offered a stable where the Christ Child was soon born, with angels proclaiming this news to shepherds who then further disseminated the information. [22] Although the month and date of Jesus' birth are unknown, by the early-to-mid fourth century the Western Christia n Church had placed Christmas on December 25,[23] a date that was later adopted in the East.[24][25] Today, mos t Christians celebrate on December 25 in the Gregorian calendar, which has been adopted almost universally in th e civil calendars used in countries throughout the world. However, some Eastern Christian Churches celebrate Ch ristmas on December 25 of the older Julian calendar, which currently corresponds to January 7 in the Gregorian ca lendar, the day after the Western Christian Church celebrates the Epiphany. This is not a disagreement over the d ate of Christmas as such, but rather a preference of which calendar should be used to determine the day that is De cember 25. Moreover, for Christians, the belief that God came into the world in the form of man to atone for the si ns of humanity, rather than the exact birth date, is considered to be the primary purpose in celebrating Christmas.[ 26][271[281129] The celebratory customs associated in various countries with Christmas have a mix of pre-Christian, Christian, an d secular themes and origins.[30] Popular modern customs of the holiday include gift giving, completing an Advent calendar or Advent wreath, Christmas music and caroling, lighting a Christingle, viewing a Nativity play, an excha nge of Christmas cards, church services, a special meal, and the display of various Christmas decorations, includin g Christmas trees, Christmas lights, nativity scenes, garlands, wreaths, mistletoe, and holly. In addition, several cl osely related and often interchangeable figures, known as Santa Claus, Father Christmas, Saint Nicholas, and Chris tkind, are associated with bringing gifts to children during the Christmas season and have their own body of traditi ons and lore.[31] Because gift-giving and many other aspects of the Christmas festival involve heightened econom ic activity, the holiday has become a significant event and a key sales period for retailers and businesses. The econ omic imnactofChristmashas ơrownsteadilv over the nast few centuries inmanv reơions f theworld

Please let me know in case of any clarifications required. Thanks!