/** * See the general contract of the <code>reset</code> * method of <code>InputStream</code>. * <p> * If <code>markpos</code> is <code>-1</code> * (no mark has been set or the mark has been * invalidated), an <code>IOException</code> * is thrown. Otherwise, <code>pos</code> is * set equal to <code>markpos</code>. * * @exception IOException if this stream has not been marked or, * if the mark has been invalidated, or the stream * has been closed by invoking its {@link #close()} * method, or an I/O error occurs. * @see java.io.BufferedInputStream#mark(int) */ public synchronized void reset() throws IOException { getBufIfOpen(); // Cause exception if closed if (markpos < 0) throw new IOException("Resetting to invalid mark"); pos = markpos; }
/** * See the general contract of the <code>reset</code> * method of <code>InputStream</code>. * <p> * If <code>markpos</code> is <code>-1</code> * (no mark has been set or the mark has been * invalidated), an <code>IOException</code> * is thrown. Otherwise, <code>pos</code> is * set equal to <code>markpos</code>. * * @exception IOException if this stream has not been marked or, * if the mark has been invalidated, or the stream * has been closed by invoking its {@link #close()} * method, or an I/O error occurs. * @see java.io.BufferedInputStream#mark(int) */ public synchronized void reset() throws IOException { getBufIfOpen(); // Cause exception if closed if (markpos < 0) throw new IOException("Resetting to invalid mark"); pos = markpos; }
/** * See * the general contract of the <code>read</code> * method of <code>InputStream</code>. * * @return the next byte of data, or <code>-1</code> if the end of the * stream is reached. * @exception IOException if this input stream has been closed by * invoking its {@link #close()} method, * or an I/O error occurs. * @see java.io.FilterInputStream#in */ public synchronized int read() throws IOException { if (pos >= count) { fill(); if (pos >= count) return -1; } return getBufIfOpen()[pos++] & 0xff; }
/** * See * the general contract of the <code>read</code> * method of <code>InputStream</code>. * * @return the next byte of data, or <code>-1</code> if the end of the * stream is reached. * @exception IOException if this input stream has been closed by * invoking its {@link #close()} method, * or an I/O error occurs. * @see java.io.FilterInputStream#in */ public synchronized int read() throws IOException { if (pos >= count) { fill(); if (pos >= count) return -1; } return getBufIfOpen()[pos++] & 0xff; }
/** * Read characters into a portion of an array, reading from the underlying * stream at most once if necessary. */ private int read1(byte[] b, int off, int len) throws IOException { int avail = count - pos; if (avail <= 0) { /* If the requested length is at least as large as the buffer, and if there is no mark/reset activity, do not bother to copy the bytes into the local buffer. In this way buffered streams will cascade harmlessly. */ if (len >= getBufIfOpen().length && markpos < 0) { return getInIfOpen().read(b, off, len); } fill(); avail = count - pos; if (avail <= 0) return -1; } int cnt = (avail < len) ? avail : len; System.arraycopy(getBufIfOpen(), pos, b, off, cnt); pos += cnt; return cnt; }
/** * Read characters into a portion of an array, reading from the underlying * stream at most once if necessary. */ private int read1(byte[] b, int off, int len) throws IOException { int avail = count - pos; if (avail <= 0) { /* If the requested length is at least as large as the buffer, and if there is no mark/reset activity, do not bother to copy the bytes into the local buffer. In this way buffered streams will cascade harmlessly. */ if (len >= getBufIfOpen().length && markpos < 0) { return getInIfOpen().read(b, off, len); } fill(); avail = count - pos; if (avail <= 0) return -1; } int cnt = (avail < len) ? avail : len; System.arraycopy(getBufIfOpen(), pos, b, off, cnt); pos += cnt; return cnt; }
byte[] buffer = getBufIfOpen(); if (markpos < 0) pos = 0; /* no mark: throw away the buffer */
byte[] buffer = getBufIfOpen(); if (markpos < 0) pos = 0; /* no mark: throw away the buffer */
throws IOException getBufIfOpen(); // Check for closed stream if ((off | len | (off + len) | (b.length - (off + len))) < 0) { throw new IndexOutOfBoundsException();
throws IOException getBufIfOpen(); // Check for closed stream if ((off | len | (off + len) | (b.length - (off + len))) < 0) { throw new IndexOutOfBoundsException();
/** * See the general contract of the <code>skip</code> * method of <code>InputStream</code>. * * @exception IOException if the stream does not support seek, * or if this input stream has been closed by * invoking its {@link #close()} method, or an * I/O error occurs. */ public synchronized long skip(long n) throws IOException { getBufIfOpen(); // Check for closed stream if (n <= 0) { return 0; } long avail = count - pos; if (avail <= 0) { // If no mark position set then don't keep in buffer if (markpos <0) return getInIfOpen().skip(n); // Fill in buffer to save bytes for reset fill(); avail = count - pos; if (avail <= 0) return 0; } long skipped = (avail < n) ? avail : n; pos += skipped; return skipped; }
/** * See the general contract of the <code>skip</code> * method of <code>InputStream</code>. * * @exception IOException if the stream does not support seek, * or if this input stream has been closed by * invoking its {@link #close()} method, or an * I/O error occurs. */ public synchronized long skip(long n) throws IOException { getBufIfOpen(); // Check for closed stream if (n <= 0) { return 0; } long avail = count - pos; if (avail <= 0) { // If no mark position set then don't keep in buffer if (markpos <0) return getInIfOpen().skip(n); // Fill in buffer to save bytes for reset fill(); avail = count - pos; if (avail <= 0) return 0; } long skipped = (avail < n) ? avail : n; pos += skipped; return skipped; }
Enter a value 10 value provided is: 10 Enter a value java.io.IOException: Stream closed at java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:162) at java.io.BufferedInputStream.fill(BufferedInputStream.java:206) at java.io.BufferedInputStream.read(BufferedInputStream.java:254) at Main.main(Main.java:24) Exception in thread "main" java.util.NoSuchElementException at java.util.Scanner.throwFor(Scanner.java:907) at java.util.Scanner.next(Scanner.java:1530) at java.util.Scanner.nextInt(Scanner.java:2160) at java.util.Scanner.nextInt(Scanner.java:2119) at Main.main(Main.java:12)