求大神赐教编码问题？

[小气包yuzhi]

import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;


public class Demo8 {
		public static  void main(String [] args) throws IOException {
			String str = "中国";
			System.out.print("默认:"+Arrays.toString(str.getBytes())+"\r\n");
			System.out.println("gbk2312码表:"+Arrays.toString(str.getBytes("gb2312")));
			System.out.println("utf-8码表:"+Arrays.toString(str.getBytes("utf-8")));
			System.out.println("unicode码表:"+Arrays.toString(str.getBytes("unicode")));
			
			FileWriter writer = new FileWriter("d:\\1.txt");
			writer.write(str);
			writer.flush();
			FileInputStream in = new FileInputStream("d:\\1.txt");
			System.out.println("我一个一个字节的读回来怎么不一样了");
			System.out.print(in.read()+"-");
			System.out.print(in.read()+"-");
			System.out.print(in.read()+"-");
			System.out.print(in.read()+"-");
			System.out.print(in.read()+"-");
			System.out.print(in.read()+"-");
			

		}
}

[小气包yuzhi]

没有回答我要问的问题啊，我说的是写入的utf-8编码和读出来的utf-8怎么不一致？？？

[nmyangym]

把输出改成byte型，回=会和“默认”时输出的结果一样。

            System.out.print((byte)(in.read()&0xff) +", ");
            System.out.print((byte)(in.read()&0xff) +", ");
            System.out.print((byte)(in.read()&0xff) +", ");
            System.out.print((byte)(in.read()&0xff) +", ");
            System.out.print((byte)(in.read()&0xff) +", ");
            System.out.print((byte)(in.read()&0xff));

[灰太狼的太太太爷爷]

一样才怪呢，编码不同生成的字节数组当然也有不同。。。。。。

[adobe2000]

str.getBytes()设置不同编码格式得到的数组是不一样的

[无聊找乐]

一个汉字是两个字节