FileWriter(File file)

FileWrite(String filename)

OutputStreamWriter out = new OutputStreamWriter(
	new FileOutputStream(File file))

public class Main {
    public static void main(String[] args) throws Exception {
        File file = new File("d:/abc/f10");
        // 創(chuàng)建文件
        file.createNewFile();
        // creates a FileWriter Object
        FileWriter writer = new FileWriter(file);
        // 向文件寫入內(nèi)容
        writer.write("This\n is\n an\n example\n");
        writer.flush();
        writer.close();
        // 創(chuàng)建 FileReader 對(duì)象
        FileReader fr = new FileReader(file);
        char[] a = new char[50];
        fr.read(a); // 從數(shù)組中讀取內(nèi)容
        for (char c : a)
            System.out.print(c); // 一個(gè)個(gè)打印字符
        fr.close();
    }
}

BufferedReader in  = new BufferedReader（new FileReader（“foo.in”））;

BufferedWriter bufw = new BufferedWriter(new FileWriter("d:/abc/f11"));
bufw.write("This");
bufw.newLine();
bufw.newLine();
bufw.write("is");
bufw.write("an");
bufw.write("example");
//使用緩沖區(qū)中的方法，將數(shù)據(jù)刷新到目的地文件中去。
bufw.flush();
//關(guān)閉緩沖區(qū),同時(shí)關(guān)閉了fw流對(duì)象
bufw.close();

//相接的字符流，只要讀取字符，都要做編碼轉(zhuǎn)換
        //只要使用字符流，必須要有轉(zhuǎn)換流
        BufferedReader in = new BufferedReader(
                new InputStreamReader(
                        new FileInputStream("d:/abc/f11")));

        String line;
        while ((line = in.readLine()) != null) {
            System.out.println(line);
        }
        in.close();