diff options
Diffstat (limited to 'src/share/classes/java/util/jar/Pack200.java')
| -rw-r--r-- | src/share/classes/java/util/jar/Pack200.java | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/src/share/classes/java/util/jar/Pack200.java b/src/share/classes/java/util/jar/Pack200.java index 83a5d2049..41dec9180 100644 --- a/src/share/classes/java/util/jar/Pack200.java +++ b/src/share/classes/java/util/jar/Pack200.java @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2003,2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -212,10 +212,18 @@ public abstract class Pack200 { * to produce a specific bytewise image for any given transmission * ordering of archive elements.) * <p> - * In order to maintain backward compatibility, if the input JAR-files are - * solely comprised of 1.5 (or lesser) classfiles, a 1.5 compatible - * pack file is produced. Otherwise a 1.6 compatible pack200 file is - * produced. + * In order to maintain backward compatibility, the pack file's version is + * set to accommodate the class files present in the input JAR file. In + * other words, the pack file version will be the latest, if the class files + * are the latest and conversely the pack file version will be the oldest + * if the class file versions are also the oldest. For intermediate class + * file versions the corresponding pack file version will be used. + * For example: + * If the input JAR-files are solely comprised of 1.5 (or lesser) + * class files, a 1.5 compatible pack file is produced. This will also be + * the case for archives that have no class files. + * If the input JAR-files contains a 1.6 class file, then the pack file + * version will be set to 1.6. * <p> * @since 1.5 */ @@ -236,9 +244,10 @@ public abstract class Pack200 { * input file to be transmitted in the segment, along with the size * of its name and other transmitted properties. * <p> - * The default is 1000000 (a million bytes). This allows input JAR files - * of moderate size to be transmitted in one segment. It also puts - * a limit on memory requirements for packers and unpackers. + * The default is -1, which means the packer will always create a single + * segment output file. In cases where extremely large output files are + * generated, users are strongly encouraged to use segmenting or break + * up the input file into smaller JARs. * <p> * A 10Mb JAR packed without this limit will * typically pack about 10% smaller, but the packer may require |