java编程题采用文件字符输入流和文件字符输出流把 Dwordatxt 复制到Ewordatxt分别采用一次读取一个字符的方式和一次读取一个字符数组的方式

一次读取一个字符的方式：

import java.io.*;

public class FileCopyOneChar {
    public static void main(String[] args) {
        try {
            FileReader reader = new FileReader("D:\\word\\a.txt");
            FileWriter writer = new FileWriter("E:\\word\\a.txt");

            int ch;
            while ((ch = reader.read()) != -1) {
                writer.write(ch);
            }

            reader.close();
            writer.close();
            System.out.println("文件复制成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

一次读取一个字符数组的方式：

import java.io.*;

public class FileCopyCharArray {
    public static void main(String[] args) {
        try {
            FileReader reader = new FileReader("D:\\word\\a.txt");
            FileWriter writer = new FileWriter("E:\\word\\a.txt");

            char[] buffer = new char[1024];
            int len;
            while ((len = reader.read(buffer)) != -1) {
                writer.write(buffer, 0, len);
            }

            reader.close();
            writer.close();
            System.out.println("文件复制成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
``