hello/java/samples/file/FileReaderAndWriter2.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package filereaderandwriter2;

import java.io.File;
import java.io.*;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author denis
 */
public class FileReaderAndWriter2 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        File file = new File("SameFile.txt");
        if(!file.exists()) try {
            file.createNewFile();
        } catch (IOException ex) {
            Logger.getLogger(FileReaderAndWriter2.class.getName()).log(Level.SEVERE, null, ex);
        }
        
        String message = "Hello world";
        try (FileWriter writer = new FileWriter(file, true)) {
            writer.append("\n" + message);
        } catch (IOException ex) {
        }
        
        try(FileReader reader = new FileReader(file)){
            StringBuffer buffer = new StringBuffer();
            char[] cbuf = new char[1024];
            int count = 0;
            while((count = reader.read(cbuf)) != -1){
                buffer.append(new String(cbuf, 0, count));
            }
            System.out.println(buffer.toString());
        }catch(IOException e) {}
        
    }
    
}