apache / commons-compressDuplication

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:

38,023 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
2,109 duplicated lines

213 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 213 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	93:138 (12%) 173:217 (12%)	view
26	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	LocalVariableTableAttribute.java LocalVariableTypeTableAttribute.java	71:135 (32%) 71:135 (32%)	view
22	x 2	src/main/java/org/apache...ress/compressors/brotli src/main/java/org/apache...s/compressors/zstandard	BrotliCompressorInputStream.java ZstdCompressorInputStream.java	45:81 (51%) 64:100 (46%)	view
22	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	ClassBands.java SegmentUtils.java	76:100 (2%) 38:62 (35%)	view
21	x 2	src/main/java/org/apache...press/harmony/unpack200 src/main/java/org/apache...press/harmony/unpack200	SegmentConstantPool.java SegmentConstantPool.java	135:157 (14%) 199:221 (14%)	view
20	x 2	src/main/java/org/apache.../compress/archivers/zip src/main/java/org/apache.../compress/archivers/zip	PKWareExtraHeader.java UnrecognizedExtraField.java	212:273 (21%) 54:108 (51%)	view
19	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	804:826 (3%) 869:891 (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	559:580 (1%) 57:80 (65%)	view
17	x 2	src/main/java/org/apache...press/compressors/bzip2 src/main/java/org/apache...press/compressors/bzip2	BZip2CompressorInputStream.java BZip2CompressorInputStream.java	426:444 (3%) 493:511 (3%)	view
15	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	272:294 (2%) 274:296 (2%)	view
14	x 2	src/main/java/org/apache...press/compressors/bzip2 src/main/java/org/apache...press/compressors/bzip2	BZip2CompressorOutputStream.java BZip2CompressorOutputStream.java	655:671 (2%) 681:697 (2%)	view
13	x 2	src/main/java/org/apache.../compress/archivers/tar src/main/java/org/apache.../compress/archivers/tar	TarArchiveInputStream.java TarFile.java	472:496 (3%) 490:514 (4%)	view
13	x 2	src/main/java/org/apache...press/harmony/unpack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	647:662 (2%) 903:918 (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	581:596 (2%) 838:853 (2%)	view
12	x 2	src/main/java/org/apache...press/compressors/bzip2 src/main/java/org/apache...press/compressors/bzip2	BZip2CompressorOutputStream.java BZip2CompressorOutputStream.java	280:300 (1%) 310:330 (1%)	view
12	x 2	src/main/java/org/apache...ress/compressors/brotli src/main/java/org/apache...s/compressors/zstandard	BrotliCompressorInputStream.java ZstdCompressorInputStream.java	87:104 (27%) 109:126 (25%)	view
11	x 2	src/main/java/org/apache...ess/compressors/deflate src/main/java/org/apache...compress/compressors/xz	DeflateCompressorOutputStream.java XZCompressorOutputStream.java	69:91 (42%) 77:99 (50%)	view
11	x 2	src/main/java/org/apache...mpress/compressors/lzma src/main/java/org/apache...compress/compressors/xz	LZMACompressorInputStream.java XZCompressorInputStream.java	103:124 (28%) 138:157 (18%)	view
10	x 2	src/main/java/org/apache...ess/compressors/deflate src/main/java/org/apache...mpress/compressors/lzma	DeflateCompressorInputStream.java LZMACompressorInputStream.java	112:127 (20%) 117:132 (25%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	907:919 (1%) 953:965 (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	680:692 (1%) 748:759 (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	585:599 (1%) 651:665 (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	256:266 (2%) 682:692 (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	920:933 (1%) 967:980 (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	552:565 (1%) 606:619 (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	256:266 (2%) 306:316 (2%)	view
10	x 2	src/site/xdoc src/site/xdoc	mail-lists.xml mail-lists.xml	87:99 (8%) 183:193 (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	347:362 (1%) 374:389 (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	306:316 (2%) 682:692 (2%)	view
10	x 2	src/main/java/org/apache...mons/compress/archivers src/main/java/org/apache...ns/compress/compressors	ArchiveInputStream.java CompressorInputStream.java	80:114 (43%) 34:68 (62%)	view
10	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	842:856 (1%) 907:921 (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	76:88 (2%) 205:217 (2%)	view
9	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPFieldRef.java CPMethodRef.java	70:82 (17%) 37:50 (45%)	view
9	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	CpBands.java CpBands.java	111:119 (2%) 125:133 (2%)	view
9	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	585:596 (1%) 907:918 (1%)	view
9	x 2	src/main/java/org/apache...press/harmony/unpack200 src/main/java/org/apache...press/harmony/unpack200	BandSet.java BandSet.java	287:296 (3%) 331:340 (3%)	view
9	x 2	src/main/java/org/apache...npack200/bytecode/forms src/main/java/org/apache...npack200/bytecode/forms	LookupSwitchForm.java TableSwitchForm.java	70:87 (22%) 74:91 (20%)	view
9	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...press/harmony/unpack200	NewAttributeBands.java NewAttributeBands.java	842:853 (1%) 651:662 (1%)	view
9	x 2	src/main/java/org/apache.../compress/archivers/zip src/main/java/org/apache.../compress/archivers/zip	ZipLong.java ZipShort.java	149:168 (17%) 103:122 (20%)	view
9	x 2	src/main/java/org/apache.../compress/archivers/tar src/main/java/org/apache.../compress/archivers/tar	TarArchiveInputStream.java TarFile.java	400:414 (2%) 434:448 (3%)	view
8	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	ClassBands.java ClassBands.java	1106:1114 (<1%) 1139:1147 (<1%)	view
8	x 2	src/main/java/org/apache...compress/archivers/dump src/main/java/org/apache...mony/unpack200/bytecode	DumpArchiveSummary.java CPNameAndType.java	65:74 (8%) 61:70 (14%)	view
8	x 2	src/main/java/org/apache...ompress/harmony/pack200 src/main/java/org/apache...ompress/harmony/pack200	IntList.java IntList.java	128:137 (5%) 155:164 (5%)	view
8	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	Attribute.java CPClass.java	43:52 (19%) 51:60 (18%)	view
8	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPClass.java CPConstant.java	51:60 (18%) 41:50 (36%)	view
8	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPNameAndType.java CPRef.java	61:70 (14%) 51:60 (14%)	view
8	x 2	src/site/xdoc src/site/xdoc	examples.xml examples.xml	960:967 (<1%) 1103:1110 (<1%)	view
8	x 2	src/main/java/org/apache...compress/archivers/dump src/main/java/org/apache...mony/unpack200/bytecode	DumpArchiveSummary.java CPMember.java	65:74 (8%) 66:75 (11%)	view
8	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPInterfaceMethodRef.java CPMethodRef.java	28:37 (42%) 31:40 (40%)	view
8	x 2	src/main/java/org/apache.../compress/archivers/zip src/main/java/org/apache.../compress/archivers/zip	AsiExtraField.java JarMarker.java	249:265 (6%) 100:117 (25%)	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	869:892 804:827	view
20	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	LocalVariableTypeTableAttribute.java LocalVariableTableAttribute.java	85:131 85:131	view
14	x 2	src/main/java/org/apache...press/harmony/unpack200 src/main/java/org/apache...ompress/harmony/pack200	NewAttributeBands.java NewAttributeBands.java	605:620 551:566	view
9	x 2	src/main/java/org/apache...compress/compressors/xz src/main/java/org/apache...mpress/compressors/lzma	XZUtils.java LZMAUtils.java	144:156 128:140	view
6	x 2	src/main/java/org/apache...press/harmony/unpack200 src/main/java/org/apache...ompress/harmony/pack200	NewAttributeBands.java NewAttributeBands.java	380:387 353:360	view
6	x 2	src/main/java/org/apache...npack200/bytecode/forms src/main/java/org/apache...npack200/bytecode/forms	InitMethodReferenceForm.java NewInitMethodRefForm.java	49:56 41:48	view
6	x 2	src/main/java/org/apache...mony/unpack200/bytecode src/main/java/org/apache...mony/unpack200/bytecode	CPInterfaceMethodRef.java CPMethodRef.java	28:35 31:38	view
6	x 2	src/main/java/org/apache...mpress/archivers/sevenz src/main/java/org/apache...mpress/archivers/sevenz	LZMADecoder.java LZMA2Decoder.java	69:76 82:89	view
6	x 2	src/main/java/org/apache...ress/compressors/brotli src/main/java/org/apache...s/compressors/zstandard	BrotliUtils.java ZstdUtils.java	47:54 60:67	view
6	x 2	src/main/java/org/apache...ompress/compressors/lz4 src/main/java/org/apache...ress/compressors/snappy	FramedLZ4CompressorInputStream.java FramedSnappyCompressorInputStream.java	324:331 319:326	view