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
- 32% duplication:
- 2,945 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 948 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
CustomTransition/Application/src/main/java/com/example/android/common (98%)
--> RevealEffectBasic/Application/src/main/java/com/example/android/common (98%)
380
6 file pairs
details...
Interpolator/Application/src/main/java/com/example/android/common (98%)
--> RevealEffectBasic/Application/src/main/java/com/example/android/common (98%)
380
6 file pairs
details...
BasicTransition/Application/src/main/java/com/example/android/common (44%)
--> RevealEffectBasic/Application/src/main/java/com/example/android/common (98%)
380
6 file pairs
details...
BasicTransition/Application/src/main/java/com/example/android/common (44%)
--> CustomTransition/Application/src/main/java/com/example/android/common (98%)
380
6 file pairs
details...
BasicTransition/Application/src/main/java/com/example/android/common (44%)
--> Interpolator/Application/src/main/java/com/example/android/common (98%)
380
6 file pairs
details...
CustomTransition/Application/src/main/java/com/example/android/common (98%)
--> Interpolator/Application/src/main/java/com/example/android/common (98%)
380
6 file pairs
details...
CustomTransition/Application/src/main/java/com/example/android/customtransition (38%)
--> Interpolator/Application/src/main/java/com/example/android/interpolator (31%)
88
1 file pair
details...
Interpolator/Application/src/main/java/com/example/android/interpolator (31%)
--> RevealEffectBasic/Application/src/main/java/com/example/android/revealeffectbasic (60%)
88
1 file pair
details...
CustomTransition/Application/src/main/java/com/example/android/customtransition (38%)
--> RevealEffectBasic/Application/src/main/java/com/example/android/revealeffectbasic (60%)
88
1 file pair
details...
BasicTransition/Application/src/main/java/com/example/android/basictransition (48%)
--> CustomTransition/Application/src/main/java/com/example/android/customtransition (38%)
88
1 file pair
details...
BasicTransition/Application/src/main/java/com/example/android/basictransition (48%)
--> RevealEffectBasic/Application/src/main/java/com/example/android/revealeffectbasic (60%)
88
1 file pair
details...
BasicTransition/Application/src/main/java/com/example/android/basictransition (48%)
--> Interpolator/Application/src/main/java/com/example/android/interpolator (31%)
88
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| CustomTransition/Application/src/main/java/com/example/android/common (98%) --> RevealEffectBasic/Application/src/main/java/com/example/android/common (98%) |
380 | 6 file pairs | details... |
| Interpolator/Application/src/main/java/com/example/android/common (98%) --> RevealEffectBasic/Application/src/main/java/com/example/android/common (98%) |
380 | 6 file pairs | details... |
| BasicTransition/Application/src/main/java/com/example/android/common (44%) --> RevealEffectBasic/Application/src/main/java/com/example/android/common (98%) |
380 | 6 file pairs | details... |
| BasicTransition/Application/src/main/java/com/example/android/common (44%) --> CustomTransition/Application/src/main/java/com/example/android/common (98%) |
380 | 6 file pairs | details... |
| BasicTransition/Application/src/main/java/com/example/android/common (44%) --> Interpolator/Application/src/main/java/com/example/android/common (98%) |
380 | 6 file pairs | details... |
| CustomTransition/Application/src/main/java/com/example/android/common (98%) --> Interpolator/Application/src/main/java/com/example/android/common (98%) |
380 | 6 file pairs | details... |
| CustomTransition/Application/src/main/java/com/example/android/customtransition (38%) --> Interpolator/Application/src/main/java/com/example/android/interpolator (31%) |
88 | 1 file pair | details... |
| Interpolator/Application/src/main/java/com/example/android/interpolator (31%) --> RevealEffectBasic/Application/src/main/java/com/example/android/revealeffectbasic (60%) |
88 | 1 file pair | details... |
| CustomTransition/Application/src/main/java/com/example/android/customtransition (38%) --> RevealEffectBasic/Application/src/main/java/com/example/android/revealeffectbasic (60%) |
88 | 1 file pair | details... |
| BasicTransition/Application/src/main/java/com/example/android/basictransition (48%) --> CustomTransition/Application/src/main/java/com/example/android/customtransition (38%) |
88 | 1 file pair | details... |
| BasicTransition/Application/src/main/java/com/example/android/basictransition (48%) --> RevealEffectBasic/Application/src/main/java/com/example/android/revealeffectbasic (60%) |
88 | 1 file pair | details... |
| BasicTransition/Application/src/main/java/com/example/android/basictransition (48%) --> Interpolator/Application/src/main/java/com/example/android/interpolator (31%) |
88 | 1 file pair | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 60 | x 2 | CustomTransition/Applica...e/android/common/loggerRevealEffectBasic/Applic...e/android/common/logger |  LogView.javaLogView.java |
25:141 (100%)25:141 (100%) | view |
| 60 | x 2 | Interpolator/Application...e/android/common/loggerRevealEffectBasic/Applic...e/android/common/logger | LogView.javaLogView.java |
25:141 (100%)25:141 (100%) | view |
| 60 | x 2 | BasicTransition/Applicat...e/android/common/loggerRevealEffectBasic/Applic...e/android/common/logger | LogView.javaLogView.java |
25:141 (100%)25:141 (100%) | view |
| 60 | x 2 | BasicTransition/Applicat...e/android/common/loggerCustomTransition/Applica...e/android/common/logger | LogView.javaLogView.java |
25:141 (100%)25:141 (100%) | view |
| 60 | x 2 | BasicTransition/Applicat...e/android/common/loggerInterpolator/Application...e/android/common/logger | LogView.javaLogView.java |
25:141 (100%)25:141 (100%) | view |
| 60 | x 2 | CustomTransition/Applica...e/android/common/loggerInterpolator/Application...e/android/common/logger | LogView.javaLogView.java |
25:141 (100%)25:141 (100%) | view |
| 46 | x 2 | BasicTransition/Applicat...e/android/common/loggerCustomTransition/Applica...e/android/common/logger | Log.javaLog.java |
26:234 (100%)26:234 (100%) | view |
| 46 | x 2 | CustomTransition/Applica...e/android/common/loggerRevealEffectBasic/Applic...e/android/common/logger | Log.javaLog.java |
26:234 (100%)26:234 (100%) | view |
| 46 | x 2 | BasicTransition/Applicat...e/android/common/loggerRevealEffectBasic/Applic...e/android/common/logger | Log.javaLog.java |
26:234 (100%)26:234 (100%) | view |
| 46 | x 2 | CustomTransition/Applica...e/android/common/loggerInterpolator/Application...e/android/common/logger | Log.javaLog.java |
26:234 (100%)26:234 (100%) | view |
| 46 | x 2 | BasicTransition/Applicat...e/android/common/loggerInterpolator/Application...e/android/common/logger | Log.javaLog.java |
26:234 (100%)26:234 (100%) | view |
| 46 | x 2 | Interpolator/Application...e/android/common/loggerRevealEffectBasic/Applic...e/android/common/logger | Log.javaLog.java |
26:234 (100%)26:234 (100%) | view |
| 42 | x 2 | BasicTransition/Applicat...e/android/common/loggerCustomTransition/Applica...e/android/common/logger | LogFragment.javaLogFragment.java |
49:107 (100%)49:107 (100%) | view |
| 42 | x 2 | BasicTransition/Applicat...e/android/common/loggerRevealEffectBasic/Applic...e/android/common/logger | LogFragment.javaLogFragment.java |
49:107 (100%)49:107 (100%) | view |
| 42 | x 2 | CustomTransition/Applica...e/android/common/loggerRevealEffectBasic/Applic...e/android/common/logger | LogFragment.javaLogFragment.java |
49:107 (100%)49:107 (100%) | view |
| 42 | x 2 | Interpolator/Application...e/android/common/loggerRevealEffectBasic/Applic...e/android/common/logger | LogFragment.javaLogFragment.java |
49:107 (100%)49:107 (100%) | view |
| 42 | x 2 | CustomTransition/Applica...e/android/common/loggerInterpolator/Application...e/android/common/logger | LogFragment.javaLogFragment.java |
49:107 (100%)49:107 (100%) | view |
| 42 | x 2 | BasicTransition/Applicat...e/android/common/loggerInterpolator/Application...e/android/common/logger | LogFragment.javaLogFragment.java |
49:107 (100%)49:107 (100%) | view |
| 35 | x 2 | CustomTransition/Applica...ndroid/customtransitionInterpolator/Application...le/android/interpolator | MainActivity.javaMainActivity.java |
54:108 (77%)54:108 (77%) | view |
| 35 | x 2 | Interpolator/Application...le/android/interpolatorRevealEffectBasic/Applic...droid/revealeffectbasic | MainActivity.javaMainActivity.java |
54:108 (77%)54:108 (77%) | view |
Duplicated Units
The list of top 7 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 43 | x 4 | RevealEffectBasic/Applic...e/android/common/loggerBasicTransition/Applicat...e/android/common/loggerInterpolator/Application...e/android/common/loggerCustomTransition/Applica...e/android/common/logger | LogView.javaLogView.javaLogView.javaLogView.java |
48:106 48:106 48:106 48:106 | view |
| 22 | x 4 | RevealEffectBasic/Applic...e/android/common/loggerBasicTransition/Applicat...e/android/common/loggerInterpolator/Application...e/android/common/loggerCustomTransition/Applica...e/android/common/logger | LogFragment.javaLogFragment.javaLogFragment.javaLogFragment.java |
56:83 56:83 56:83 56:83 | view |
| 14 | x 4 | RevealEffectBasic/Applic...e/android/common/loggerBasicTransition/Applicat...e/android/common/loggerInterpolator/Application...e/android/common/loggerCustomTransition/Applica...e/android/common/logger | LogFragment.javaLogFragment.javaLogFragment.javaLogFragment.java |
86:104 86:104 86:104 86:104 | view |
| 14 | x 4 | RevealEffectBasic/Applic...droid/revealeffectbasicBasicTransition/Applicat...android/basictransitionInterpolator/Application...le/android/interpolatorCustomTransition/Applica...ndroid/customtransition | MainActivity.javaMainActivity.javaMainActivity.javaMainActivity.java |
75:89 75:89 75:89 75:89 | view |
| 12 | x 4 | RevealEffectBasic/Applic...e/android/common/loggerBasicTransition/Applicat...e/android/common/loggerInterpolator/Application...e/android/common/loggerCustomTransition/Applica...e/android/common/logger | LogWrapper.javaLogWrapper.javaLogWrapper.javaLogWrapper.java |
52:74 52:74 52:74 52:74 | view |
| 9 | x 4 | RevealEffectBasic/Applic...droid/revealeffectbasicBasicTransition/Applicat...android/basictransitionInterpolator/Application...le/android/interpolatorCustomTransition/Applica...ndroid/customtransition | MainActivity.javaMainActivity.javaMainActivity.javaMainActivity.java |
93:109 93:109 93:109 93:109 | view |
| 8 | x 4 | RevealEffectBasic/Applic...e/android/common/loggerBasicTransition/Applicat...e/android/common/loggerInterpolator/Application...e/android/common/loggerCustomTransition/Applica...e/android/common/logger | LogView.javaLogView.javaLogView.javaLogView.java |
125:134 125:134 125:134 125:134 | view |