字节流缓存
import java.io.*; class MyBufferedInputStream{ private InputStream in; private byte[] buf = byte[1024*4]; private int pos = 0,count = 0;//指针,计数器 MyBufferedInputStream(InputStream in) { this.in=in; } public int myRead() { if(count==0){ count = in.read(buf);//读取字符流,存入数组 if(count<0) //结尾 return -1; pos=0; byte b= buf[pos]; count--; pos++; return b&0xff; }else if (count>0){ byte b= buf[pos]; count--; pos++; return b&0xff;//避免文件中连续八个1,返回后为-1 } return -1; } public void myClose()throws IOException { in.close(); } }
利用数组,模拟字符流缓冲区