Java写入字符FileWriter

public class FileWriter_ {
    public static void main(String[] args) {
        String filePath = "e:\note.txt";
        FileWriter fileWriter = null;
        char[] chars = {'a','b','c'};
        try {
            fileWriter = new FileWriter(filePath);
            //写入单个字符
            fileWriter.write('H');
            //写入字符数组
            fileWriter.write(chars);
            //写入指定数组的指定部分
            fileWriter.write("天上星亮晶晶".toCharArray(),4,2);
            //写入字符串
            fileWriter.write(" 黄河之水天上来~");
            //写入字符串的指定部分
            fileWriter.write("滚滚长江东逝水",0,2);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                //一定要close或flush，否则会写不进去字符
                fileWriter.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}