JAVA IO - BufferedWriter 输出字符流

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();
}
}
}