import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class AppendToFile {

	public static void main(String[] args) throws IOException {

		String path = "/home/jr/Desktop/file1.txt";
		String text = "add this text";
		
		File file = new File(path);
		FileWriter writer = new FileWriter(file, true);

		writer.append(text);
		writer.close();
	}
}