import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

public class Test4 {
    public static void main(String[] args) throws IOException {
        // 获得字节输入流对象
        FileInputStream fileInputStream = new FileInputStream("a.txt");
        // 获取数据
        byte[] bytes = new byte[4];
        int len = fileInputStream.read(bytes);
        // 遍历
        while (len != -1) {
            // 遍历字节数组 获取字节成员
            for (int i = 0; i < len; i++) {
                byte b = bytes[i];
                System.out.println(b);
            }
            // 重新获取一下数据 更新len的值
            len = fileInputStream.read(bytes);
        }
        // 关闭资源
        fileInputStream.close();

        System.out.println("game over");
    }
}