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JRE 8 rt.jar - com.* Package Source Code
JRE 8 rt.jar is the JAR file for JRE 8 RT (Runtime) libraries.
JRE (Java Runtime) 8 is the runtime environment included in JDK 8.
JRE 8 rt.jar libraries are divided into 6 packages:
com.* - Internal Oracle and Sun Microsystems libraries java.* - Standard Java API libraries. javax.* - Extended Java API libraries. jdk.* - JDK supporting libraries. org.* - Third party libraries. sun.* - Old libraries developed by Sun Microsystems.
JAR File Information:
Directory of C:\fyicenter\jdk-1.8.0_191\jre\lib 63,596,151 rt.jar
Here is the list of Java classes of the com.* package in JRE 1.8.0_191 rt.jar. Java source codes are also provided.
✍: FYIcenter
⏎ com/sun/imageio/plugins/common/LZWCompressor.java
/* * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package com.sun.imageio.plugins.common; import java.io.IOException; import java.io.PrintStream; import javax.imageio.stream.ImageOutputStream; /* * Modified from original LZWCompressor to change interface to passing a * buffer of data to be compressed. */ public class LZWCompressor { /** base underlying code size of data being compressed 8 for TIFF, 1 to 8 for GIF **/ int codeSize; /** reserved clear code based on code size **/ int clearCode; /** reserved end of data code based on code size **/ int endOfInfo; /** current number bits output for each code **/ int numBits; /** limit at which current number of bits code size has to be increased **/ int limit; /** the prefix code which represents the predecessor string to current input point **/ short prefix; /** output destination for bit codes **/ BitFile bf; /** general purpose LZW string table **/ LZWStringTable lzss; /** modify the limits of the code values in LZW encoding due to TIFF bug / feature **/ boolean tiffFudge; /** * @param out destination for compressed data * @param codeSize the initial code size for the LZW compressor * @param TIFF flag indicating that TIFF lzw fudge needs to be applied * @exception IOException if underlying output stream error **/ public LZWCompressor(ImageOutputStream out, int codeSize, boolean TIFF) throws IOException { bf = new BitFile(out, !TIFF); // set flag for GIF as NOT tiff this.codeSize = codeSize; tiffFudge = TIFF; clearCode = 1 << codeSize; endOfInfo = clearCode + 1; numBits = codeSize + 1; limit = (1 << numBits) - 1; if (tiffFudge) { --limit; } prefix = (short)0xFFFF; lzss = new LZWStringTable(); lzss.clearTable(codeSize); bf.writeBits(clearCode, numBits); } /** * @param buf data to be compressed to output stream * @exception IOException if underlying output stream error **/ public void compress(byte[] buf, int offset, int length) throws IOException { int idx; byte c; short index; int maxOffset = offset + length; for (idx = offset; idx < maxOffset; ++idx) { c = buf[idx]; if ((index = lzss.findCharString(prefix, c)) != -1) { prefix = index; } else { bf.writeBits(prefix, numBits); if (lzss.addCharString(prefix, c) > limit) { if (numBits == 12) { bf.writeBits(clearCode, numBits); lzss.clearTable(codeSize); numBits = codeSize + 1; } else { ++numBits; } limit = (1 << numBits) - 1; if (tiffFudge) { --limit; } } prefix = (short)((short)c & 0xFF); } } } /* * Indicate to compressor that no more data to go so write out * any remaining buffered data. * * @exception IOException if underlying output stream error */ public void flush() throws IOException { if (prefix != -1) { bf.writeBits(prefix, numBits); } bf.writeBits(endOfInfo, numBits); bf.flush(); } public void dump(PrintStream out) { lzss.dump(out); } }
⏎ com/sun/imageio/plugins/common/LZWCompressor.java
⇒ Backup JDK 8 Installation Directory
2019-08-19, 23535👍, 0💬
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