SequenceInputStream class « SequenceInputStream « Stream for Input « File Stream

A SequenceInputStream represents the logical concatenation of other input streams.

Constructor	Summary
SequenceInputStream(Enumeration<? extends InputStream> e)	Initializes a newly created SequenceInputStream by remembering the argument, which must be an Enumeration that produces objects whose run-time type is InputStream.
SequenceInputStream(InputStream s1, InputStream s2)	Initializes a newly created SequenceInputStream by remembering the two arguments, which will be read in order, first s1 and then s2, to provide the bytes to be read from this SequenceInputStream.

Return	Method	Summary
int	available()	Returns an estimate of the number of bytes that can be read (or skipped over) from the current underlying input stream without blocking by the next invocation of a method for the current underlying input stream.
void	close()	Closes this input stream and releases any system resources associated with the stream.
int	read()	Reads the next byte of data from this input stream.
int	read(byte[] b, int off, int len)	Reads up to len bytes of data from this input stream into an array of bytes.


import java.io.FileInputStream;
import java.io.IOException;
import java.io.SequenceInputStream;

public class Main {
  public static void main(String args[]) throws IOException {
    SequenceInputStream inStream;
    FileInputStream f1 = new FileInputStream("file1.java");
    FileInputStream f2 = new FileInputStream("file2.java");
    inStream = new SequenceInputStream(f1, f2);
    boolean eof = false;
    int byteCount = 0;
    while (!eof) {
      int c = inStream.read();
      if (c == -1)
        eof = true;
      else {
        System.out.print((char) c);
        ++byteCount;
      }
    }
    System.out.println(byteCount + " bytes were read");
    inStream.close();
    f1.close();
    f2.close();
  }
}