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
- 5% duplication:
- 4,080 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 205 duplicated lines
- 34 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 34 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 10 | x 2 | metrics/src/main/java/co...ook/battery/metrics/cpumetrics/src/main/java/co...ook/battery/metrics/cpu | 43:54 (8%)88:99 (8%) | view | |
| 9 | x 2 | metrics/src/main/java/co...ttery/metrics/appwakeupmetrics/src/main/java/co...ttery/metrics/appwakeup | 44:54 (7%)69:79 (7%) | view | |
| 9 | x 2 | metrics/src/main/java/co.../battery/metrics/memorymetrics/src/main/java/co.../battery/metrics/memory | 52:64 (10%)74:86 (10%) | view | |
| 7 | x 2 | metrics/src/main/java/co...ttery/metrics/compositemetrics/src/main/java/co...ttery/metrics/composite | 28:36 (7%)58:66 (7%) | view | |
| 7 | x 2 | metrics/src/main/java/co.../battery/metrics/sensormetrics/src/main/java/co...attery/metrics/wakelock | 228:237 (4%)113:123 (7%) | view | |
| 7 | x 2 | metrics/src/main/java/co...y/metrics/devicebatterymetrics/src/main/java/co...ok/battery/metrics/time | 71:80 (10%)61:70 (15%) | view | |
| 7 | x 2 | metrics/src/main/java/co...ook/battery/metrics/cpumetrics/src/main/java/co...battery/metrics/network | 128:137 (5%)65:74 (9%) | view | |
| 7 | x 2 | metrics/src/main/java/co...ttery/metrics/bluetoothmetrics/src/main/java/co.../battery/metrics/sensor | 60:69 (9%)228:237 (4%) | view | |
| 7 | x 2 | metrics/src/main/java/co...ttery/metrics/bluetoothmetrics/src/main/java/co...attery/metrics/wakelock | 60:69 (9%)113:123 (7%) | view | |
| 7 | x 2 | metrics/src/main/java/co...attery/metrics/wakelockmetrics/src/main/java/co...attery/metrics/wakelock | 78:87 (6%)101:110 (6%) | view | |
| 7 | x 2 | metrics/src/main/java/co...ttery/metrics/bluetoothmetrics/src/main/java/co.../battery/metrics/sensor | 60:69 (9%)80:90 (4%) | view | |
| 7 | x 2 | metrics/src/main/java/co.../battery/metrics/sensormetrics/src/main/java/co.../battery/metrics/sensor | 80:90 (4%)228:237 (4%) | view | |
| 7 | x 2 | metrics/src/main/java/co...y/metrics/devicebatterymetrics/src/main/java/co.../battery/metrics/memory | 71:80 (10%)83:92 (7%) | view | |
| 7 | x 2 | metrics/src/main/java/co.../battery/metrics/memorymetrics/src/main/java/co...ok/battery/metrics/time | 83:92 (7%)61:70 (15%) | view | |
| 7 | x 2 | metrics/src/main/java/co.../battery/metrics/sensormetrics/src/main/java/co...attery/metrics/wakelock | 80:90 (4%)113:123 (7%) | view | |
| 6 | x 2 | metrics/src/main/java/co...ttery/metrics/compositemetrics/src/main/java/co.../battery/metrics/sensor | 150:156 (6%)231:237 (3%) | view | |
| 6 | x 2 | metrics/src/main/java/co...ttery/metrics/bluetoothmetrics/src/main/java/co...ttery/metrics/composite | 63:69 (8%)150:156 (6%) | view | |
| 6 | x 2 | metrics/src/main/java/co.../battery/metrics/camerametrics/src/main/java/co...battery/metrics/network | 67:73 (11%)68:74 (8%) | view | |
| 6 | x 2 | metrics/src/main/java/co.../battery/metrics/camerametrics/src/main/java/co.../battery/metrics/memory | 67:73 (11%)86:92 (6%) | view | |
| 6 | x 2 | metrics/src/main/java/co...battery/metrics/networkmetrics/src/main/java/co...battery/metrics/network | 31:37 (12%)47:53 (12%) | view | |
| 6 | x 2 | metrics/src/main/java/co.../battery/metrics/memorymetrics/src/main/java/co...battery/metrics/network | 86:92 (6%)68:74 (8%) | view | |
| 6 | x 2 | metrics/src/main/java/co...ook/battery/metrics/cpumetrics/src/main/java/co...ok/battery/metrics/time | 131:137 (5%)64:70 (13%) | view | |
| 6 | x 2 | metrics/src/main/java/co.../battery/metrics/camerametrics/src/main/java/co...ook/battery/metrics/cpu | 67:73 (11%)131:137 (5%) | view | |
| 6 | x 2 | metrics/src/main/java/co...battery/metrics/networkmetrics/src/main/java/co...ok/battery/metrics/time | 68:74 (8%)64:70 (13%) | view | |
| 6 | x 2 | metrics/src/main/java/co...ook/battery/metrics/cpumetrics/src/main/java/co.../battery/metrics/memory | 50:57 (10%)56:63 (11%) | view | |
| 6 | x 2 | metrics/src/main/java/co...ook/battery/metrics/cpumetrics/src/main/java/co...battery/metrics/network | 70:76 (8%)73:79 (8%) | view | |
| 6 | x 2 | metrics/src/main/java/co...ook/battery/metrics/cpumetrics/src/main/java/co.../battery/metrics/memory | 131:137 (5%)86:92 (6%) | view | |
| 6 | x 2 | metrics/src/main/java/co...y/metrics/devicebatterymetrics/src/main/java/co...battery/metrics/network | 74:80 (9%)68:74 (8%) | view | |
| 6 | x 2 | metrics/src/main/java/co...ttery/metrics/compositemetrics/src/main/java/co.../battery/metrics/sensor | 150:156 (6%)83:90 (3%) | view | |
| 6 | x 2 | metrics/src/main/java/co...ook/battery/metrics/cpumetrics/src/main/java/co...y/metrics/devicebattery | 131:137 (5%)74:80 (9%) | view | |
| 6 | x 2 | metrics/src/main/java/co.../battery/metrics/camerametrics/src/main/java/co...y/metrics/devicebattery | 67:73 (11%)74:80 (9%) | view | |
| 6 | x 2 | metrics/src/main/java/co...ttery/metrics/compositemetrics/src/main/java/co...attery/metrics/wakelock | 150:156 (6%)116:123 (6%) | view | |
| 6 | x 2 | metrics/src/main/java/co...y/metrics/devicebatterymetrics/src/main/java/co...y/metrics/devicebattery | 41:48 (9%)58:65 (9%) | view | |
| 6 | x 2 | metrics/src/main/java/co.../battery/metrics/camerametrics/src/main/java/co...ok/battery/metrics/time | 67:73 (11%)64:70 (13%) | view |
