JAVA IO - BufferedWriter 輸出字符流

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


public class BufferedWriterTest {
    public static void main(String args[]){
    	try {
    		 
			String content = "This is the content to write into file";
 
			File file = new File("helloworld.txt");
 
			// if file doesnt exists, then create it
			if (!file.exists()) {
				file.createNewFile();
			}
 
			FileWriter fw = new FileWriter(file.getAbsoluteFile());
			BufferedWriter bw = new BufferedWriter(fw);
			bw.write(content);
			bw.close();
 
			System.out.println("Done");
 
		} catch (IOException e) {
			e.printStackTrace();
		}
    }
}