我具有用于读取数据的这段代码,并且可以正常工作,但是我想更改从中读取数据的起点-我的DataFile.txt是“ abcdefghi”
输出是
1)97
2)98
3)99
4)100
我想从第二个字节开始,所以输出将是
1)98
2)99
3)100
4)etc
码:
import java.io.*;
public class ReadFileDemo3 {
public static void main(String[] args)throws IOException {
MASTER MASTER = new MASTER();
MASTER.PART1();
}
}
class MASTER {
void PART1() throws IOException{
System.out.println("OK START THIS PROGRAM");
File file = new File("D://DataFile.txt");
BufferedInputStream HH = null;
int B = 0;
HH = new BufferedInputStream(new FileInputStream(file));
for (int i=0; i<4; i++) {
B = B + 1;
System.out.println(B+")"+HH.read());
}
}
}
最佳答案
您可以如下简单地忽略前n
个字节。
HH = new BufferedInputStream(new FileInputStream(file));
int B = 0;
int n = 1; // number of bytes to ignore
while(HH.available()>0) {
// read the byte and convert the integer to character
char c = (char)HH.read();
if(B<n){
continue;
}
B++;
System.out.println(B + ")" + (int)c);
}
编辑:如果要访问文件中的随机位置,则需要使用RandomAccessFile。有关详细示例,请参见this。
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