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Open a text file into JTextArea

Complete source code below will show you, how to open a text file with file extension (.txt) into JTextArea.

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COMPLETE SOURCE CODE FOR : OpenTextFileIntoJTextArea.java
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import javax.swing.*;

import java.util.*;

import java.io.*;

public class OpenTextFileIntoJTextArea
{
public static void main(String[]args)
{
try
{
//Read a text file named MyTextFile.txt
//You can download this text file at the link below
//You also can change to other text file by change it's name
//Don't forget to put .txt
//If your text file locate at other location,
//you must put it full location.
//For example :
//C:\\Documents and Settings\\evergreen\\MyTextFile.txt
FileReader readTextFile=new FileReader("MyTextFile.txt");

//Create a scanner object from FileReader
Scanner fileReaderScan=new Scanner(readTextFile);

//Create a String that will store all text in the text file
String storeAllString="";

//Put all text from text file into created String
while(fileReaderScan.hasNextLine())
{
String temp=fileReaderScan.nextLine()+"\n";

storeAllString=storeAllString+temp;
}

//Set JTextArea text to created String
JTextArea textArea=new JTextArea(storeAllString);

//Set JTextArea to line wrap
textArea.setLineWrap(true);

//Set JTextArea text to word wrap
textArea.setWrapStyleWord(true);

//Create scrollbar for text area
JScrollPane scrollBarForTextArea=new JScrollPane(textArea,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);

//Create a window using JFrame with title ( Open text file into JTextArea )
JFrame frame=new JFrame("Open text file into JTextArea");

//Add scrollbar into JFrame
frame.add(scrollBarForTextArea);

//Set default close operation for JFrame
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//Set JFrame size
frame.setSize(500,500);

//Make JFrame locate at center on screen
frame.setLocationRelativeTo(null);

//Make JFrame visible
frame.setVisible(true);
}
catch(Exception exception)
{
//Print Error in file processing if it can't process your text file
System.out.println("Error in file processing");
}
}
}


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JUST COMPILE AND EXECUTE IT
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CLICK HERE TO DOWNLOAD MyTextFile.txt
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