Java class with methods for simplifying file i/o.

FileUtilities.java

import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.FileSystems;
import java.io.File;
import java.io.BufferedReader;
import java.io.IOException;
import java.lang.StringBuffer;

public class FileUtilities
{
  
  private Charset charset;
	private StringBuffer stringBffr;
	
	public FileUtilities()
	{
	  charset = Charset.forName("US-ASCII");
		stringBffr = new StringBuffer();
	}
	
  public static void fileOpen(JComponent j) {
		JFileChooser fc = new JFileChooser();
		int returnVal = fc.showOpenDialog(this);
		if ( returnVal == JFileChooser.APPROVE_OPTION ) {
			java.io.File file = fc.getSelectedFile();
			// Open and read the file to a string buffer
			try (BufferedReader reader = Files.newBufferedReader(FileSystems.getDefault().getPath(file.getPath()), charset)) {
				String line = null;
				while ((line = reader.readLine()) != null) {
					stringBffr.append(line+"\n");
				}
			} catch (IOException iox) {
				System.err.format("IOException: %s%n", iox);
			}
			System.out.println("Opening: " + file.getName());
		} else {
			System.out.println("Open command cancelled by user.");
		}
		j.append(stringBffr.toString());
	}
}