QiangCai opened a new pull request #3825:
URL: https://github.com/apache/carbondata/pull/3825
### Why is this PR needed?
1. Field can be 'final'
2. Redundant 'if' statement
3. Empty method
4. Redundant 'throws' clause
5. Anonymous type can be replaced with lambda
6. Typo
7. Redundant String operation
### What changes were proposed in this PR?
1. change field to be 'final'
2. change redundant 'if' statement
3. remove Empty method
4. remove redundant 'throws' clause
5. change anonymous type to lambda
6. fix typo
7. remove redundant String operation
### Does this PR introduce any user interface change?
- No
### Is any new testcase added?
- No
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