InputStream 和OutputStream
文件FileInputStream和FileOutputStream
1.InputStream(输出流类)数据从文件Java代码中
//int read();读取一个字节
public static void main(String [] args) throws Exception{
InputStream is=new FileInputStream("src/main2dishizhang/java.txt");
byte [] bs=new byte [10];
int b;
while((b=is.read())!=-1){//读取一个字节
System.out.println(b);
}
int length=is.read(bs);
System.out.println(Arrays.toString(bs));
}
// int read(byte[]);//读取一串字节
while(true){
int length=is.read(bs);
System.out.println(Arrays.toString(bs));
for(int i=0;i<length;i++){
System.out.print((char)bs[i]);//读取一串字节
}
System.out.println();
if(length<10){
break;
}
}
//long avaliable;//文件长度
System.out.println(is.available());