apache / commons-compress

Intro

For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.

Learn more...

Duplication Overall

5% duplication:

35,248 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
1,829 duplicated lines

196 duplicates

dependency graphs: 2D graph | 3D graph | 3D graph (with duplicates)...

Duplication per Extension

Duplication per Component (primary)

Longest Duplicates

The list of 50 longest duplicates.

See data for all 196 duplicates...

Size	#	Folders	Files	Lines	Code
35	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	MetadataBandGroup.java MetadataBandGroup.java	94:139 (14%) 173:217 (14%)	view
26	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	LocalVariableTableAttribute.java LocalVariableTypeTableAttribute.java	75:139 (32%) 75:139 (32%)	view
24	x 2	src/main/java/org/apache.../compress/archivers/tar src/main/java/org/apache.../compress/archivers/tar	TarArchiveInputStream.java TarFile.java	440:481 (7%) 476:519 (8%)	view
22	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	ClassBands.java SegmentUtils.java	87:111 (2%) 39:63 (35%)	view
20	x 2	src/main/java/org/apache.../compress/archivers/zip src/main/java/org/apache.../compress/archivers/zip	PKWareExtraHeader.java UnrecognizedExtraField.java	290:347 (22%) 54:111 (52%)	view
19	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	823:845 (3%) 882:904 (3%)	view
17	x 2	src/main/java/org/apache...press/compressors/bzip2 src/main/java/org/apache...press/compressors/bzip2	BZip2CompressorInputStream.java BZip2CompressorInputStream.java	395:413 (3%) 458:476 (3%)	view
17	x 2	src/main/java/org/apache...mpress/archivers/sevenz src/main/java/org/apache/commons/compress/utils	SevenZFile.java CountingInputStream.java	755:778 (1%) 65:88 (62%)	view
15	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	293:315 (2%) 290:312 (2%)	view
15	x 2	src/main/java/org/apache...press/compressors/bzip2 src/main/java/org/apache...mpress/compressors/gzip	BZip2Utils.java GzipUtils.java	57:124 (57%) 115:182 (34%)	view
14	x 2	src/main/java/org/apache...press/compressors/bzip2 src/main/java/org/apache...press/compressors/bzip2	BZip2CompressorOutputStream.java BZip2CompressorOutputStream.java	615:631 (2%) 641:657 (2%)	view
13	x 2	src/main/java/org/apache...press/harmony/unpack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	661:676 (2%) 915:930 (2%)	view
13	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	NewAttributeBands.java NewAttributeBands.java	600:615 (2%) 856:871 (2%)	view
11	x 2	src/main/java/org/apache...mpress/compressors/lzma src/main/java/org/apache...compress/compressors/xz	LZMACompressorInputStream.java XZCompressorInputStream.java	144:165 (22%) 207:226 (15%)	view
11	x 2	src/main/java/org/apache...press/compressors/bzip2 src/main/java/org/apache...press/compressors/bzip2	BZip2CompressorOutputStream.java BZip2CompressorOutputStream.java	273:292 (1%) 302:321 (1%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	572:585 (1%) 622:635 (1%)	view
10	x 2	src/main/java/org/apache...compress/archivers/cpio src/main/java/org/apache.../compress/archivers/tar	CpioArchiveOutputStream.java TarArchiveOutputStream.java	176:194 (4%) 291:311 (3%)	view
10	x 2	src/main/java/org/apache...press/compressors/bzip2 src/main/java/org/apache...compress/compressors/xz	BZip2Utils.java XZUtils.java	57:101 (38%) 76:120 (17%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	922:934 (1%) 965:977 (1%)	view
10	x 2	src/main/java/org/apache...mpress/compressors/gzip src/main/java/org/apache...mpress/compressors/lzma	GzipUtils.java LZMAUtils.java	115:159 (23%) 69:107 (17%)	view
10	x 2	src/main/java/org/apache...ess/compressors/deflate src/main/java/org/apache...mpress/compressors/lzma	DeflateCompressorInputStream.java LZMACompressorInputStream.java	100:115 (22%) 158:173 (20%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	Segment.java Segment.java	272:282 (2%) 693:703 (2%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	Segment.java Segment.java	323:333 (2%) 693:703 (2%)	view
10	x 2	src/site/xdoc src/site/xdoc	mail-lists.xml mail-lists.xml	91:103 (8%) 185:195 (8%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	368:383 (1%) 390:405 (1%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	Segment.java Segment.java	272:282 (2%) 323:333 (2%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	699:711 (1%) 761:772 (1%)	view
10	x 2	src/main/java/org/apache...mpress/compressors/lzma src/main/java/org/apache...compress/compressors/xz	LZMAUtils.java XZUtils.java	69:107 (17%) 76:120 (17%)	view
10	x 2	src/main/java/org/apache...mpress/compressors/gzip src/main/java/org/apache...compress/compressors/xz	GzipUtils.java XZUtils.java	115:159 (23%) 76:120 (17%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	860:874 (1%) 919:933 (1%)	view
10	x 2	src/main/java/org/apache...press/compressors/bzip2 src/main/java/org/apache...mpress/compressors/lzma	BZip2Utils.java LZMAUtils.java	57:101 (38%) 69:107 (17%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	935:948 (1%) 979:992 (1%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	Segment.java Segment.java	95:107 (2%) 224:236 (2%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	604:618 (1%) 665:679 (1%)	view
9	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	860:871 (1%) 665:676 (1%)	view
9	x 2	src/main/java/org/apache...npack200/bytecode/forms src/main/java/org/apache...npack200/bytecode/forms	LookupSwitchForm.java TableSwitchForm.java	72:89 (23%) 82:99 (20%)	view
9	x 2	src/main/java/org/apache.../compress/archivers/zip src/main/java/org/apache.../compress/archivers/zip	ZipLong.java ZipShort.java	159:179 (17%) 119:139 (19%)	view
9	x 2	src/main/java/org/apache.../compress/archivers/tar src/main/java/org/apache.../compress/archivers/tar	TarArchiveInputStream.java TarFile.java	372:386 (2%) 425:439 (3%)	view
9	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	604:615 (1%) 919:930 (1%)	view
9	x 2	src/main/java/org/apache...ompress/compressors/lz4 src/main/java/org/apache...ress/compressors/snappy	FramedLZ4CompressorOutputStream.java SnappyCompressorOutputStream.java	213:229 (6%) 156:172 (7%)	view
9	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPFieldRef.java CPMethodRef.java	64:77 (19%) 40:53 (45%)	view
8	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	IntList.java IntList.java	130:139 (5%) 157:166 (5%)	view
8	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPClass.java CPFieldRef.java	79:89 (19%) 72:82 (17%)	view
8	x 2	src/main/java/org/apache...ress/compressors/snappy src/main/java/org/apache...ress/compressors/snappy	FramedSnappyCompressorOutputStream.java SnappyCompressorOutputStream.java	91:106 (12%) 156:171 (6%)	view
8	x 2	src/site/xdoc src/site/xdoc	examples.xml examples.xml	963:970 (<1%) 1106:1113 (<1%)	view
8	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPInterfaceMethodRef.java CPMethodRef.java	35:44 (42%) 34:43 (40%)	view
8	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	BandSet.java BandSet.java	739:746 (2%) 750:757 (2%)	view
8	x 2	src/site/xdoc src/site/xdoc	examples.xml examples.xml	980:987 (<1%) 1022:1029 (<1%)	view
8	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPClass.java CPString.java	79:89 (19%) 60:75 (25%)	view
8	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	ClassConstantPool.java ClassConstantPool.java	211:219 (7%) 224:232 (7%)	view

Duplicated Units

The list of top 10 duplicated units.

See data for all 10 unit duplicates...

Size	#	Folders	Files	Lines	Code
22	x 2	src/main/java/org/apache...press/harmony/unpack200 src/main/java/org/apache...ompress/harmony/pack200	NewAttributeBands.java NewAttributeBands.java	882:905 823:846	view
20	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	LocalVariableTypeTableAttribute.java LocalVariableTableAttribute.java	89:135 89:135	view
14	x 2	src/main/java/org/apache...press/harmony/unpack200 src/main/java/org/apache...ompress/harmony/pack200	NewAttributeBands.java NewAttributeBands.java	621:636 571:586	view
9	x 2	src/main/java/org/apache...mpress/compressors/lzma src/main/java/org/apache...compress/compressors/xz	LZMAUtils.java XZUtils.java	162:174 181:193	view
7	x 2	src/main/java/org/apache...compress/archivers/cpio src/main/java/org/apache.../compress/archivers/tar	CpioArchiveOutputStream.java TarArchiveOutputStream.java	177:185 292:300	view
6	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPMethodRef.java CPInterfaceMethodRef.java	34:41 35:42	view
6	x 2	src/main/java/org/apache...press/harmony/unpack200 src/main/java/org/apache...ompress/harmony/pack200	NewAttributeBands.java NewAttributeBands.java	396:403 374:381	view
6	x 2	src/main/java/org/apache...s/compressors/zstandard src/main/java/org/apache...ress/compressors/brotli	ZstdUtils.java BrotliUtils.java	64:71 47:54	view
6	x 2	src/main/java/org/apache...ompress/compressors/lz4 src/main/java/org/apache...ress/compressors/snappy	FramedLZ4CompressorInputStream.java FramedSnappyCompressorInputStream.java	322:329 315:322	view
6	x 2	src/main/java/org/apache...mpress/archivers/sevenz src/main/java/org/apache...mpress/archivers/sevenz	LZMADecoder.java LZMA2Decoder.java	71:78 84:91	view