78 golden rules for java programming and 78 golden rules for java

78 golden rules for java programming and 78 golden rules for java

 

Create and destroy objects 1. Consider replacing the constructor with the static factory method (the static method of the returned class instance ). 2. When encountering multiple constructor parameters, consider using Constructor 3. Use a private constructor or enumeration type to enhance the Singleton attribute. 4. Enhance the non-instantiation capability through the private constructor 5. Avoid creating unnecessary objects. 6. Remove expired object references 7. Avoid using the final Method Common methods for all objects 8. comply with general conventions when overwriting equals 9. overwrite the hashCode when overwriting equals. 10. always overwrite toString 11. Carefully overwrite clone 12. Consider implementing the Comparable Interface Class and Interface 13. Minimize the accessibility of classes and members 14. Use Access methods in public classes instead of public domains 15. Minimize Variability 16. combination is better than inheritance 17. Either Design for inheritance, provide document instructions, or prohibit inheritance 18. interfaces are better than abstract classes. 19. The interface is only used to define the type 20. class hierarchy is better than label class 21. Using function objects to represent policies 22. Give priority to static member classes Generic 23. Do not use the original ecological type in the new Code 24. Eliminate non-inspected warnings 25. List takes precedence over Array 26. Give priority to generic 27. Give priority to generic methods 28. Use restricted wildcards to improve API flexibility 29. Type-safe isomorphic constructors are prioritized Enumeration and Annotation 30. Start int constant with enum 31. Replace ordinal number with instance domain 32. Use EnumSet to replace the Bit Field 33. Replacing the ordinal index with EnumMap 34. Use interfaces to simulate scalable Enumeration 35. annotation takes precedence over naming 36. Stick to the Override Annotation 37. Define the type with the Mark Interface Method 38. Check the parameter Validity 39. Make a protective copy if necessary 40. Design Method signature with caution 41. Use heavy load with caution 42. use variable parameters with caution 43. returns an array or set with zero length instead of null. 44. Compile document comments for all exported API Elements General Program Design 45. Minimize the scope of local variables 46. for-each loop takes precedence over the traditional for loop. [for Loop Why can hate] http://justjavac.com/other/2012/05/15/whats-wrong-with-the-for-loop.html 47. understand and use the class library 48. If you need a precise answer, avoid using float and double 49. The basic type takes precedence over the basic packing type. 50. Avoid using strings if other types are more suitable. 51. Be careful with the performance of string links 52. Reference objects through interfaces 53. Interfaces take precedence over reflection mechanisms 54. Use the local method with caution 55. Careful Optimization 56. comply with universally accepted naming conventions Exception 57. Use exceptions only in case of exceptions 58. Check exceptions for recoverable situations and run exceptions for programming errors 59. Avoid unnecessary use of checked exceptions 60. Standard-of-priority exceptions 61. Throwing an exception corresponding to the Abstraction 62. The exception thrown by each method must be documented. 63. Contain capture Failure Information in the detail message 64. Try to make the failure contain atomicity 65. Do not ignore exceptions Concurrency 66. synchronous access to shared variable data 67. Avoid excessive Synchronization 68. executor and task take precedence over thread 69. Concurrent tools take precedence over wait and paiy 70. Documented thread security ......

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