java中从键盘输入字符存入文件中

/*
*
* 功能：从键盘输入字符存入文件中
*/
package com.test3;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Scanner;

public class Demo4 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("请输入");
Scanner scanner = new Scanner(System.in);
String str = scanner.next();
File f=new File("d:\\ss.txt");

//字节流输出
FileOutputStream fos=null;
try {
fos=new FileOutputStream(f);

//定义一个数组
//byte []bytes=new byte[1024];
//如何把String转换成byte数组
fos.write(str.getBytes());

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

finally
{
try {
fos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}

}