apache / commons-ioDuplication

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

6% duplication:

14,991 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
990 duplicated lines

79 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 79 duplicates...

Size	#	Folders	Files	Lines	Code
24	x 2	src/main/java/org/apache/commons/io src/main/java/org/apache/commons/io	IOUtils.java IOUtils.java	913:940 (3%) 984:1011 (3%)	view
23	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	NullInputStream.java NullReader.java	144:208 (23%) 127:191 (25%)	view
19	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	UncheckedBufferedReader.java UncheckedFilterReader.java	116:164 (48%) 110:158 (52%)	view
17	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	TeeInputStream.java TeeReader.java	78:125 (48%) 70:114 (36%)	view
16	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/output	CountingInputStream.java CountingOutputStream.java	71:127 (55%) 66:122 (69%)	view
14	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	NullInputStream.java NullReader.java	303:342 (14%) 288:327 (15%)	view
14	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyOutputStream.java ProxyWriter.java	79:124 (32%) 137:184 (15%)	view
13	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	ProxyInputStream.java ProxyReader.java	218:239 (19%) 241:262 (15%)	view
11	x 2	src/main/java/org/apache/commons/io src/main/java/org/apache/commons/io	FileUtils.java FileUtils.java	367:384 (1%) 422:439 (1%)	view
11	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	CharSequenceInputStream.java ReaderInputStream.java	93:114 (8%) 126:146 (8%)	view
11	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	CleaningPathVisitor.java DeletingPathVisitor.java	82:104 (23%) 100:122 (18%)	view
10	x 2	ROOT src/site/xdoc	PROPOSAL.html proposal.xml	59:68 (24%) 65:74 (25%)	view
10	x 2	src/site/xdoc src/site/xdoc	mail-lists.xml mail-lists.xml	87:99 (8%) 183:193 (8%)	view
9	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	NullInputStream.java NullReader.java	290:300 (9%) 275:285 (9%)	view
9	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	UncheckedBufferedReader.java UncheckedFilterReader.java	172:190 (23%) 158:176 (25%)	view
9	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	CleaningPathVisitor.java DeletingPathVisitor.java	107:119 (19%) 125:137 (15%)	view
9	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	175:204 (9%) 159:188 (10%)	view
9	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	UnixLineEndingInputStream.java WindowsLineEndingInputStream.java	110:126 (20%) 117:133 (17%)	view
8	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	CleaningPathVisitor.java CopyDirectoryVisitor.java	95:104 (17%) 93:102 (14%)	view
8	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	TaggedInputStream.java TaggedReader.java	82:118 (72%) 81:114 (72%)	view
8	x 2	src/main/java/org/apache/commons/io/filefilter src/main/java/org/apache/commons/io/filefilter	AndFileFilter.java OrFileFilter.java	144:164 (14%) 137:157 (16%)	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	BrokenOutputStream.java BrokenWriter.java	70:99 (44%) 68:99 (44%)	view
8	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	CopyDirectoryVisitor.java DeletingPathVisitor.java	93:102 (14%) 113:122 (13%)	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	DeferredFileOutputStream.java DeferredFileOutputStream.java	257:264 (6%) 279:286 (6%)	view
8	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	UnixLineEndingInputStream.java WindowsLineEndingInputStream.java	75:93 (18%) 82:100 (15%)	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	242:258 (8%) 224:239 (9%)	view
8	x 2	src/main/java/org/apache/commons/io src/main/java/org/apache/commons/io	CopyUtils.java CopyUtils.java	169:189 (9%) 278:299 (9%)	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	TaggedOutputStream.java TaggedWriter.java	78:114 (72%) 78:114 (72%)	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	129:158 (8%) 116:147 (9%)	view
8	x 2	src/main/java/org/apache/commons/io/filefilter src/main/java/org/apache/commons/io/filefilter	AndFileFilter.java OrFileFilter.java	193:200 (14%) 182:189 (16%)	view
7	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	NullInputStream.java NullReader.java	76:82 (7%) 76:82 (7%)	view
7	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	CharSequenceInputStream.java ReaderInputStream.java	282:294 (5%) 393:421 (5%)	view
7	x 2	src/main/java/org/apache/commons/io/build src/main/java/org/apache/commons/io/build	AbstractOrigin.java AbstractOrigin.java	156:167 (4%) 257:268 (4%)	view
7	x 2	src/site/xdoc src/site/xdoc	upgradeto2_3.xml upgradeto2_4.xml	29:37 (22%) 29:37 (14%)	view
7	x 2	src/site/xdoc src/site/xdoc	upgradeto1_3_1.xml upgradeto1_3_2.xml	38:46 (25%) 48:56 (15%)	view
7	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	NullInputStream.java NullReader.java	247:255 (7%) 232:240 (7%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	UncheckedFilterOutputStream.java UncheckedFilterWriter.java	106:122 (28%) 130:146 (17%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ChunkedOutputStream.java ChunkedWriter.java	139:145 (25%) 78:84 (36%)	view
7	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	Counters.java Counters.java	119:127 (4%) 241:249 (4%)	view
7	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	ProxyInputStream.java ProxyReader.java	151:164 (10%) 139:152 (8%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	260:277 (7%) 241:257 (7%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	206:223 (7%) 190:206 (7%)	view
7	x 2	src/site/xdoc src/site/xdoc	upgradeto2_4.xml upgradeto2_5.xml	63:70 (14%) 133:140 (5%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	225:240 (7%) 208:222 (7%)	view
7	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	BrokenInputStream.java BrokenReader.java	100:122 (29%) 114:136 (25%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_3.xml upgradeto1_3_1.xml	29:35 (3%) 29:35 (21%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_1.xml upgradeto1_2.xml	29:35 (4%) 29:35 (12%)	view
6	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	Tailer.java Tailer.java	588:593 (1%) 614:619 (1%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_2.xml upgradeto1_3_1.xml	29:35 (12%) 29:35 (21%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_1.xml upgradeto1_3_1.xml	29:35 (4%) 29:35 (21%)	view

Duplicated Units

The list of top 6 duplicated units.

See data for all 6 unit duplicates...

Size	#	Folders	Files	Lines	Code
13	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	NullInputStream.java NullReader.java	315:329 300:314	view
8	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	WindowsLineEndingInputStream.java UnixLineEndingInputStream.java	125:134 118:127	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ChunkedWriter.java ChunkedOutputStream.java	77:86 138:147	view
7	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	TeeInputStream.java TeeReader.java	91:99 82:90	view
6	x 2	src/main/java/org/apache/commons/io/filefilter src/main/java/org/apache/commons/io/filefilter	OrFileFilter.java AndFileFilter.java	183:190 194:201	view
6	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	ProxyInputStream.java ProxyReader.java	234:241 257:264	view