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JDK 1.1 Source Code Directory
JDK 1.1 source code directory contains Java source code for JDK 1.1 core classes:
"C:\fyicenter\jdk-1.1.8\src".
Here is the list of Java classes of the JDK 1.1 source code:
✍: FYIcenter
⏎ java/io/BufferedReader.java
/* * @(#)BufferedReader.java 1.13 01/12/10 * * Copyright 2002 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package java.io; /** * Read text from a character-input stream, buffering characters so as to * provide for the efficient reading of characters, arrays, and lines. * * <p> The buffer size may be specified, or the default size may be used. The * default is large enough for most purposes. * * <p> In general, each read request made of a Reader causes a corresponding * read request to be made of the underlying character or byte stream. It is * therefore advisable to wrap a BufferedReader around any Reader whose read() * operations may be costly, such as FileReaders and InputStreamReaders. For * example, * * <pre> * BufferedReader in * = new BufferedReader(new FileReader("foo.in")); * </pre> * * will buffer the input from the specified file. Without buffering, each * invocation of read() or readLine() could cause bytes to be read from the * file, converted into characters, and then returned, which can be very * inefficient. * * <p> Programs that use DataInputStreams for textual input can be localized by * replacing each DataInputStream with an appropriate BufferedReader. * * @see FileReader * @see InputStreamReader * * @version 1.13, 01/12/10 * @author Mark Reinhold * @since JDK1.1 */ public class BufferedReader extends Reader { private Reader in; private char cb[]; private int nChars, nextChar; private static final int INVALIDATED = -2; private static final int UNMARKED = -1; private int markedChar = UNMARKED; private int readAheadLimit = 0; /* Valid only when markedChar > 0 */ private static int defaultCharBufferSize = 8192; private static int defaultExpectedLineLength = 80; /** * Create a buffering character-input stream that uses an input buffer of * the specified size. * * @param in A Reader * @param sz Input-buffer size * * @exception IllegalArgumentException If sz is <= 0 */ public BufferedReader(Reader in, int sz) { super(in); if (sz <= 0) throw new IllegalArgumentException("Buffer size <= 0"); this.in = in; cb = new char[sz]; nextChar = nChars = 0; } /** * Create a buffering character-input stream that uses a default-sized * input buffer. * * @param in A Reader */ public BufferedReader(Reader in) { this(in, defaultCharBufferSize); } /** Check to make sure that the stream has not been closed */ private void ensureOpen() throws IOException { if (in == null) throw new IOException("Stream closed"); } /** * Fill the input buffer, taking the mark into account if it is valid. */ private void fill() throws IOException { int dst; if (markedChar <= UNMARKED) { /* No mark */ dst = 0; } else { /* Marked */ int delta = nextChar - markedChar; if (delta >= readAheadLimit) { /* Gone past read-ahead limit: Invalidate mark */ markedChar = INVALIDATED; readAheadLimit = 0; dst = 0; } else { if (readAheadLimit <= cb.length) { /* Shuffle in the current buffer */ System.arraycopy(cb, markedChar, cb, 0, delta); markedChar = 0; dst = delta; } else { /* Reallocate buffer to accomodate read-ahead limit */ char ncb[] = new char[readAheadLimit]; System.arraycopy(cb, markedChar, ncb, 0, delta); cb = ncb; markedChar = 0; dst = delta; } } } int n; do { n = in.read(cb, dst, cb.length - dst); } while (n == 0); if (n > 0) { nChars = dst + n; nextChar = dst; } } /** * Read a single character. * * @exception IOException If an I/O error occurs */ public int read() throws IOException { synchronized (lock) { ensureOpen(); if (nextChar >= nChars) { fill(); if (nextChar >= nChars) return -1; } return cb[nextChar++]; } } /** * Read characters into a portion of an array. * * <p> Ordinarily this method takes characters from this stream's character * buffer, filling it from the underlying stream as necessary. If, * however, the buffer is empty, the mark is not valid, and the requested * length is at least as large as the buffer, then this method will read * characters directly from the underlying stream into the given array. * Thus redundant <code>BufferedReader</code>s will not copy data * unnecessarily. * * @param cbuf Destination buffer * @param off Offset at which to start storing characters * @param len Maximum number of characters to read * * @return The number of bytes read, or -1 if the end of the stream has * been reached * * @exception IOException If an I/O error occurs */ public int read(char cbuf[], int off, int len) throws IOException { synchronized (lock) { ensureOpen(); if (nextChar >= nChars) { /* If the requested length is larger than 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 >= cb.length && markedChar <= UNMARKED) { return in.read(cbuf, off, len); } fill(); } if (nextChar >= nChars) return -1; int n = Math.min(len, nChars - nextChar); System.arraycopy(cb, nextChar, cbuf, off, n); nextChar += n; return n; } } /** * Read a line of text. A line is considered to be terminated by any one * of a line feed ('\n'), a carriage return ('\r'), or a carriage return * followed immediately by a linefeed. * * @return A String containing the contents of the line, not including * any line-termination characters, or null if the end of the * stream has been reached * * @exception IOException If an I/O error occurs */ public String readLine() throws IOException { StringBuffer s = new StringBuffer(defaultExpectedLineLength); synchronized (lock) { ensureOpen(); bufferLoop: for (;;) { if (nextChar >= nChars) fill(); if (nextChar >= nChars) { /* EOF */ if (s.length() > 0) return s.toString(); else return null; } boolean eol = false; char c = 0; int i; charLoop: for (i = nextChar; i < nChars; i++) { c = cb[i]; if ((c == '\n') || (c == '\r')) { eol = true; break charLoop; } } s.append(cb, nextChar, i - nextChar); nextChar = i; if (eol) { nextChar++; if (c == '\r') { if (nextChar >= nChars) fill(); if ((nextChar < nChars) && (cb[nextChar] == '\n')) nextChar++; } break bufferLoop; } } } return s.toString(); } /** * Skip characters. * * @param n The number of characters to skip * * @return The number of characters actually skipped * * @exception IOException If an I/O error occurs */ public long skip(long n) throws IOException { synchronized (lock) { ensureOpen(); long r = n; while (r > 0) { if (nextChar >= nChars) fill(); if (nextChar >= nChars) /* EOF */ break; long d = nChars - nextChar; if (r <= d) { nextChar += r; r = 0; break; } else { r -= d; nextChar = nChars; } } return n - r; } } /** * Tell whether this stream is ready to be read. A buffered character * stream is ready if the buffer is not empty, or if the underlying * character stream is ready. * * @exception IOException If an I/O error occurs */ public boolean ready() throws IOException { synchronized (lock) { ensureOpen(); return (nextChar < nChars) || in.ready(); } } /** * Tell whether this stream supports the mark() operation, which it does. */ public boolean markSupported() { return true; } /** * Mark the present position in the stream. Subsequent calls to reset() * will attempt to reposition the stream to this point. * * @param readAheadLimit Limit on the number of characters that may be * read while still preserving the mark. After * reading this many characters, attempting to * reset the stream may fail. A limit value larger * than the size of the input buffer will cause a * new buffer to be allocated whose size is no * smaller than limit. Therefore large values * should be used with care. * * @exception IllegalArgumentException If readAheadLimit is < 0 * @exception IOException If an I/O error occurs */ public void mark(int readAheadLimit) throws IOException { if (readAheadLimit < 0) { throw new IllegalArgumentException("Read-ahead limit < 0"); } synchronized (lock) { ensureOpen(); this.readAheadLimit = readAheadLimit; markedChar = nextChar; } } /** * Reset the stream to the most recent mark. * * @exception IOException If the stream has never been marked, * or if the mark has been invalidated */ public void reset() throws IOException { synchronized (lock) { ensureOpen(); if (markedChar < 0) throw new IOException((markedChar == INVALIDATED) ? "Mark invalid" : "Stream not marked"); nextChar = markedChar; } } /** * Close the stream. * * @exception IOException If an I/O error occurs */ public void close() throws IOException { synchronized (lock) { if (in == null) return; in.close(); in = null; cb = null; } } }
⏎ java/io/BufferedReader.java
Or download all of them as a single archive file:
File name: jdk-1.1.8-src.zip File size: 1574187 bytes Release date: 2018-11-16 Download
⇒ Backup JDK 1.1 Installation Directory
2018-11-17, 176064👍, 0💬
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