Places in code with 6 or more lines that are exactly the same.
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.
- To learn more about duplications and techniques for eliminating duplication, Sokrates recommends the following resources:
- Avoid Repetition, MartinFlower.com (IEEE Software article)
- Refactoring duplicated code, sourcemaking.com
- Beck Design Rules, MartinFowler.com
- DRY (Don't Repeat Yourself) Principle, Wikipedia
- The Cut-and-Paste Programming Software Development Anti-Pattern, sourcemaking.com
- Code Smells / Duplicated Code, Jeff Atwood, codinghorror.com:
- "Duplicated code is the bane of software development. Stamp out duplication whenever possible. You should always be on the lookout for more subtle cases of near-duplication, too. Don't Repeat Yourself!"
- Reducing Coupling, MartinFlower.com (IEEE Software article):
- "There are several ways to describe coupling, but it boils down to this: If changing one module in a program requires changing another module, then coupling exists. ... Duplication always implies coupling, because changing one piece of duplicate code implies changing the other."
Duplication Overall
- 41% duplication:
- 6,978 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 2,873 duplicated lines
- 49 duplicates
Duplication per Extension
Duplication per Component (primary)
Duplication Between Components (50+ lines)
Open 3D force graph...
Show more details on duplication between components...
From Component
--> To Component
Duplicated
Lines
File Pairs
Details
MidiScope (86%)
--> MidiSynth (94%)
2180
25 file pairs
details...
MediaRouter (7%)
--> ScreenCapture (50%)
354
5 file pairs
details...
BasicMediaDecoder (23%)
--> MediaRecorder (39%)
128
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| MidiScope (86%) --> MidiSynth (94%) |
2180 | 25 file pairs | details... |
| MediaRouter (7%) --> ScreenCapture (50%) |
354 | 5 file pairs | details... |
| BasicMediaDecoder (23%) --> MediaRecorder (39%) |
128 | 1 file pair | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 145 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth |  SynthEngine.javaSynthEngine.java |
36:281 (100%)36:281 (100%) | view |
| 98 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiPortConnector.javaMidiPortConnector.java |
32:197 (100%)32:197 (100%) | view |
| 94 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | EventScheduler.javaEventScheduler.java |
31:241 (100%)31:241 (100%) | view |
| 85 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiPortSelector.javaMidiPortSelector.java |
37:181 (100%)37:181 (100%) | view |
| 67 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiPortWrapper.javaMidiPortWrapper.java |
24:122 (100%)24:122 (100%) | view |
| 64 | x 2 | BasicMediaDecoder/Applic...le/android/common/mediaMediaRecorder/Applicatio...le/android/common/media | CameraHelper.javaCameraHelper.java |
34:188 (100%)34:188 (100%) | view |
| 63 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth | EnvelopeADSR.javaEnvelopeADSR.java |
24:108 (100%)24:108 (100%) | view |
| 60 | x 2 | MediaRouter/Application/...e/android/common/loggerScreenCapture/Applicatio...e/android/common/logger | LogView.javaLogView.java |
25:141 (100%)25:141 (100%) | view |
| 55 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiFramer.javaMidiFramer.java |
33:108 (100%)33:108 (100%) | view |
| 49 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiEventScheduler.javaMidiEventScheduler.java |
26:116 (100%)26:116 (100%) | view |
| 46 | x 2 | MediaRouter/Application/...e/android/common/loggerScreenCapture/Applicatio...e/android/common/logger | Log.javaLog.java |
26:234 (100%)26:234 (100%) | view |
| 42 | x 2 | MediaRouter/Application/...e/android/common/loggerScreenCapture/Applicatio...e/android/common/logger | LogFragment.javaLogFragment.java |
49:107 (100%)49:107 (100%) | view |
| 42 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiConstants.javaMidiConstants.java |
24:99 (100%)24:99 (100%) | view |
| 41 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth | SimpleAudioOutput.javaSimpleAudioOutput.java |
28:93 (100%)28:93 (100%) | view |
| 40 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiOutputPortSelector.javaMidiOutputPortSelector.java |
34:100 (100%)34:100 (100%) | view |
| 39 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiEventThread.javaMidiEventThread.java |
24:87 (100%)24:87 (100%) | view |
| 37 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiInputPortSelector.javaMidiInputPortSelector.java |
34:90 (100%)34:90 (100%) | view |
| 33 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiOutputPortConnectionSelector.javaMidiOutputPortConnectionSelector.java |
29:82 (100%)29:82 (100%) | view |
| 33 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth | SawOscillator.javaSawOscillator.java |
19:70 (100%)19:70 (100%) | view |
| 31 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth | SynthVoice.javaSynthVoice.java |
22:82 (100%)22:82 (100%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 55 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiFramer.javaMidiFramer.java |
49:110 49:110 | view |
| 43 | x 2 | MediaRouter/Application/...e/android/common/loggerScreenCapture/Applicatio...e/android/common/logger | LogView.javaLogView.java |
48:106 48:106 | view |
| 43 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiPortConnector.javaMidiPortConnector.java |
109:153 109:153 | view |
| 33 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiPortConnector.javaMidiPortConnector.java |
164:198 164:198 | view |
| 30 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiPortSelector.javaMidiPortSelector.java |
54:89 54:89 | view |
| 26 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiPortSelector.javaMidiPortSelector.java |
132:163 132:163 | view |
| 25 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth | EnvelopeADSR.javaEnvelopeADSR.java |
80:105 80:105 | view |
| 24 | x 2 | BasicMediaDecoder/Applic...le/android/common/mediaMediaRecorder/Applicatio...le/android/common/media | CameraHelper.javaCameraHelper.java |
155:189 155:189 | view |
| 24 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiPortWrapper.javaMidiPortWrapper.java |
42:66 42:66 | view |
| 23 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | EventScheduler.javaEventScheduler.java |
214:242 214:242 | view |
| 23 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth | SynthEngine.javaSynthEngine.java |
82:105 82:105 | view |
| 23 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiOutputPortSelector.javaMidiOutputPortSelector.java |
50:76 50:76 | view |
| 22 | x 2 | MediaRouter/Application/...e/android/common/loggerScreenCapture/Applicatio...e/android/common/logger | LogFragment.javaLogFragment.java |
56:83 56:83 | view |
| 20 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiInputPortSelector.javaMidiInputPortSelector.java |
50:71 50:71 | view |
| 16 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth | SimpleAudioOutput.javaSimpleAudioOutput.java |
57:74 57:74 | view |
| 16 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth | SynthEngine.javaSynthEngine.java |
110:126 110:126 | view |
| 16 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiEventThread.javaMidiEventThread.java |
34:52 34:52 | view |
| 15 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | EventScheduler.javaEventScheduler.java |
154:171 154:171 | view |
| 15 | x 2 | MidiScope/Application/sr...droid/common/midi/synthMidiSynth/Application/sr...droid/common/midi/synth | SynthEngine.javaSynthEngine.java |
230:245 230:245 | view |
| 15 | x 2 | MidiScope/Application/sr...ple/android/common/midiMidiSynth/Application/sr...ple/android/common/midi | MidiEventScheduler.javaMidiEventScheduler.java |
78:93 78:93 | view |