📅 最后修改于: 2020-09-27 03:19:14 🧑 作者: Mango
Java FilterInputStream类实现InputStream。它包含不同的子类，例如BufferedInputStream，DataInputStream，以提供附加功能。因此，它很少单独使用。
我们来看一下java.io.FilterInputStream类的声明
public class FilterInputStream extends InputStream
| Method | Description |
|---|---|
| int available() | It is used to return an estimate number of bytes that can be read from the input stream. |
| int read() | It is used to read the next byte of data from the input stream. |
| int read(byte[] b) | It is used to read up to byte.length bytes of data from the input stream. |
| long skip(long n) | It is used to skip over and discards n bytes of data from the input stream. |
| boolean markSupported() | It is used to test if the input stream support mark and reset method. |
| void mark(int readlimit) | It is used to mark the current position in the input stream. |
| void reset() | It is used to reset the input stream. |
| void close() | It is used to close the input stream. |
import java.io.*;
public class FilterExample {
public static void main(String[] args) throws IOException {
File data = new File("D:\\testout.txt");
FileInputStream file = new FileInputStream(data);
FilterInputStream filter = new BufferedInputStream(file);
int k =0;
while((k=filter.read())!=-1){
System.out.print((char)k);
}
file.close();
filter.close();
}
}
在这里，我们假设您在“ testout.txt”文件中包含以下数据：
Welcome to javatpoint
输出：
Welcome to javatpoint