JetBrains / fernflower Duplication

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

17% duplication:

41,640 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
7,351 duplicated lines

2,696 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 2,696 duplicates...

Size	#	Folders	Files	Lines	Code
73	x 2	testData/src/pkg testData/src/pkg	TestSwitchOnStringsEcj.java TestSwitchOnStringsJavac.java	4:96 (96%) 3:95 (64%)	view
31	x 2	src/org/jetbrains/java/d...dules/decompiler/sforms src/org/jetbrains/java/d...dules/decompiler/sforms	SSAConstructorSparseEx.java SSAUConstructorSparseEx.java	393:448 (12%) 664:720 (7%)	view
30	x 2	testData/src/pkg testData/src/pkg	TestSwitchClassReferencesFastExitEcj.... TestSwitchClassReferencesFastExitJava...	4:40 (96%) 5:41 (96%)	view
28	x 2	src/org/jetbrains/java/d...dules/decompiler/sforms src/org/jetbrains/java/d...dules/decompiler/sforms	SSAConstructorSparseEx.java SSAUConstructorSparseEx.java	330:382 (11%) 558:611 (6%)	view
26	x 2	testData/src/pkg testData/src/pkg	TestSwitchGuardedEcj.java TestSwitchGuardedJavac.java	14:47 (78%) 14:47 (78%)	view
23	x 2	testData/obfuscated testData/obfuscated	ax.java ba.java	111:137 (18%) 116:142 (17%)	view
22	x 2	testData/src/pkg testData/src/pkg	TestSwitchClassReferencesEcj.java TestSwitchClassReferencesJavac.java	5:35 (95%) 5:35 (95%)	view
22	x 2	testData/obfuscated testData/obfuscated	ap.java n.java	34:59 (33%) 146:171 (17%)	view
21	x 2	testData/obfuscated testData/obfuscated	az.java r.java	86:110 (14%) 51:75 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	a7.java az.java	20:44 (19%) 86:110 (14%)	view
21	x 2	testData/obfuscated testData/obfuscated	a7.java ba.java	20:44 (19%) 58:82 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	a4.java r.java	41:65 (16%) 51:75 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	ax.java ba.java	53:77 (16%) 58:82 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	a4.java a7.java	41:65 (16%) 20:44 (19%)	view
21	x 2	testData/obfuscated testData/obfuscated	a7.java ax.java	20:44 (19%) 53:77 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	a4.java ba.java	41:65 (16%) 58:82 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	ba.java r.java	58:82 (16%) 51:75 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	a7.java r.java	20:44 (19%) 51:75 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	ax.java az.java	53:77 (16%) 86:110 (14%)	view
21	x 2	testData/obfuscated testData/obfuscated	a4.java az.java	41:65 (16%) 86:110 (14%)	view
21	x 2	testData/obfuscated testData/obfuscated	az.java ba.java	86:110 (14%) 58:82 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	a4.java ax.java	41:65 (16%) 53:77 (16%)	view
21	x 2	testData/obfuscated testData/obfuscated	ax.java r.java	53:77 (16%) 51:75 (16%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java p.java	69:91 (2%) 206:228 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java s.java	157:179 (2%) 183:205 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	bb.java p.java	588:610 (2%) 731:753 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	bb.java p.java	151:173 (2%) 294:316 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	bb.java p.java	751:773 (2%) 894:916 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java bb.java	69:91 (2%) 63:85 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	p.java s.java	894:916 (2%) 783:805 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java s.java	598:620 (2%) 620:642 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java s.java	69:91 (2%) 95:117 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java p.java	322:344 (2%) 457:479 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	bb.java s.java	500:522 (2%) 532:554 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	bb.java p.java	500:522 (2%) 643:665 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	bb.java p.java	314:336 (2%) 457:479 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	bb.java s.java	588:610 (2%) 620:642 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	bb.java s.java	314:336 (2%) 346:368 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java p.java	157:179 (2%) 294:316 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	al.java v.java	325:347 (5%) 288:310 (5%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java p.java	598:620 (2%) 731:753 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java bb.java	598:620 (2%) 588:610 (2%)	view
19	x 2	src/org/jetbrains/java/decompiler/util src/org/jetbrains/java/decompiler/util	FastFixedSetFactory.java FastSparseSetFactory.java	287:315 (10%) 394:422 (8%)	view
19	x 2	testData/obfuscated testData/obfuscated	p.java s.java	731:753 (2%) 620:642 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java bb.java	157:179 (2%) 151:173 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	bb.java s.java	151:173 (2%) 183:205 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	aw.java v.java	227:249 (6%) 288:310 (5%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java p.java	763:785 (2%) 894:916 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	a5.java bb.java	763:785 (2%) 751:773 (2%)	view
19	x 2	testData/obfuscated testData/obfuscated	al.java aw.java	162:184 (5%) 64:86 (6%)	view

Duplicated Units

The list of top 22 duplicated units.

See data for all 22 unit duplicates...

Size	#	Folders	Files	Lines	Code
20	x 2	testData/src/pkg testData/src/pkg	TestSwitchClassReferencesFastExitEcj.... TestSwitchClassReferencesFastExitJava...	24:45 25:46	view
20	x 2	src/org/jetbrains/java/d...dules/decompiler/sforms src/org/jetbrains/java/d...dules/decompiler/sforms	SSAConstructorSparseEx.java SSAUConstructorSparseEx.java	276:302 502:529	view
19	x 2	testData/src/pkg testData/src/pkg	TestSwitchGuardedJavac.java TestSwitchGuardedEcj.java	28:48 28:48	view
17	x 2	testData/src/pkg testData/src/pkg	TestSwitchClassReferencesFastExitEcj.... TestSwitchClassReferencesFastExitJava...	4:22 5:23	view
16	x 2	testData/src/pkg testData/src/pkg	TestSwitchOnStringsJavac.java TestSwitchOnStringsEcj.java	79:96 80:97	view
15	x 2	src/org/jetbrains/java/d...dules/decompiler/sforms src/org/jetbrains/java/d...dules/decompiler/sforms	SSAConstructorSparseEx.java SSAUConstructorSparseEx.java	405:425 676:696	view
13	x 2	testData/src/pkg testData/src/pkg	TestSwitchOnStringsJavac.java TestSwitchOnStringsEcj.java	47:61 48:62	view
13	x 2	testData/src/pkg testData/src/pkg	TestSwitchOnStringsJavac.java TestSwitchOnStringsEcj.java	63:77 64:78	view
11	x 2	src/org/jetbrains/java/decompiler/util src/org/jetbrains/java/decompiler/util	FastSparseSetFactory.java FastFixedSetFactory.java	404:417 297:310	view
10	x 2	testData/src/pkg testData/src/pkg	TestTryCatchFinallyJsrRet.java TestTryCatchFinally.java	34:48 22:36	view
10	x 2	testData/src/pkg testData/src/pkg	TestSwitchOnStringsJavac.java TestSwitchOnStringsEcj.java	21:32 22:33	view
10	x 2	testData/src/pkg testData/src/pkg	TestSwitchOnStringsJavac.java TestSwitchOnStringsEcj.java	34:45 35:46	view
10	x 2	testData/src/patterns testData/src/patterns	TestInstanceofWithPattern.java TestInstanceofPatternNotSupported.java	16:27 4:15	view
8	x 2	testData/src/pkg testData/src/pkg	TestTryCatchFinallyJsrRet.java TestTryCatchFinally.java	61:70 49:58	view
8	x 2	src/org/jetbrains/java/decompiler/util src/org/jetbrains/java/decompiler/util	FastSparseSetFactory.java SFormsFastMapDirect.java	172:181 159:168	view
7	x 2	testData/src/pkg testData/src/pkg	TestSwitchOnStringsJavac.java TestSwitchOnStringsEcj.java	11:19 12:20	view
7	x 2	testData/src/pkg testData/src/pkg	TestSwitchGuardedJavac.java TestSwitchGuardedEcj.java	9:17 9:17	view
7	x 2	testData/src/pkg testData/src/pkg	TestSwitchOnEnumEclipse.java TestSwitchOnEnum.java	9:17 12:21	view
6	x 2	testData/src/pkg testData/src/pkg	TestSwitchGuardedJavac.java TestSwitchGuardedEcj.java	19:26 19:26	view
6	x 2	testData/src/pkg testData/src/pkg	TestSwitchClassReferencesEcj.java TestSwitchClassReferencesJavac.java	13:20 13:20	view
6	x 2	testData/src/pkg testData/src/pkg	TestSwitchClassReferencesEcj.java TestSwitchClassReferencesJavac.java	22:29 22:29	view
6	x 2	src/org/jetbrains/java/decompiler/main/decompiler src/org/jetbrains/java/decompiler/main/decompiler	ConsoleDecompiler.java BaseDecompiler.java	136:143 35:42	view