Using Commons Lang (to convert) + Collections (to min/max) Note that Arrays.asList() wraps the underlying array, so it should not be too memory intensive and it should not perform a copy on the elements of the array.
You cannot make an empty array and then let it grow dynamically whenever the user enters a number in the command line. You should read the numbers and put them in an ArrayList instead. An ArrayList does not require a initial size and does grow dynamically. Something like this: Ofcourse you won’t use while(true)and you won’t … Read more
I am not clear about your Odd number. The way this code works is (it is not a Java specific algorithm) Eg. input =2345 first time in the while loop rev=5 input=234 second time rev=5*10+4=54 input=23 third time rev=54*10+3 input=2 fourth time rev=543*10+2 input=0 So the reversed number is 5432. If you just want only … Read more
Have you copied classes12.jar in lib folder of your web application and set the classpath in eclipse. Right-click project in Package explorer Build path -> Add external archives… Select your ojdbc6.jar archive Press OK Or Go through this link and read and do carefully. The library should be now referenced in the “Referenced Librairies” under the Package … Read more
Quite a few problems with your code: On Arrays.asList returning a fixed-size list From the API: Arrays.asList: Returns a fixed-size list backed by the specified array. You can’t add to it; you can’t remove from it. You can’t structurally modify the List. Fix Create a LinkedList, which supports faster remove. On split taking regex From the API: String.split(String regex): Splits this string around matches of the given regular expression. … Read more
Use PowerMockito on top of Mockito. Example code: More information: Why doesn’t Mockito mock static methods?
JpaRepository extends PagingAndSortingRepository which in turn extends CrudRepository. Their main functions are: CrudRepository mainly provides CRUD functions. PagingAndSortingRepository provides methods to do pagination and sorting records. JpaRepository provides some JPA-related methods such as flushing the persistence context and deleting records in a batch. Because of the inheritance mentioned above, JpaRepository will have all the functions of CrudRepository and PagingAndSortingRepository. So if you don’t need the repository to … Read more
Run the JVM with -XX:MaxHeapSize=512m (or any big number as you need) (or -Xmx512m for short)
Assuming Java, you could sort hashmap just like this: Just a kick-off example. This way is more useful as it sorts the HashMap and keeps the duplicate values as well.