Printing a single and specific method to a file in Java
// save object to file
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("/tmp/file")));
oos.writeObject(myArray); // where myArray is String[]

// load object from file
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File("/tmp/file")));
String[] read = (String[]) ois.readObject();

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Arrays;

public class TestSerialization {

    public static void main(final String[] array) throws FileNotFoundException, IOException, ClassNotFoundException {
        // save object to file
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("/tmp/file")));
        oos.writeObject(array); // where myArray is String[]

        // load object from file
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File("/tmp/file")));
        String[] read = (String[]) ois.readObject();

        System.out.println(Arrays.toString(read));
    }

}

// create a new file with specified file name
FileWriter fw = new FileWriter("myFile.log");

// create the IO strem on that file
BufferedWriter bw = new BufferedWriter(fw);

// write a string into the IO stream
bw.out("my log entry");

// don't forget to close the stream!
bw.close();