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Preprocessor server provides text data analysis and search capabilities in HANA system. Preprocessor server is used by Index search to analyze the text data and to perform any search on the text data. This server is used to extract the information based on text search capabilities in HANA system.
Statistics server is used to manage health of your HANA system. You can take information related to status, performance consumption of resources from all the servers in your system landscape. You can also pull the reports related to performance of server components for analysis.
The Collections class provides a method named reverse() this method accepts a list and reverses the order of elements in it.Example:import java.util.ArrayList; import java.util.Collections; import java.util.LinkedHashSet; import java.util.Set; public class Sample { public static void main(String[] args){ ArrayList list = new ArrayList(); list.add("JavaFx"); list.add("Java"); list.add("WebGL"); list.add("OpenCV"); Set set = new LinkedHashSet(list); System.out.println(set); Collections.reverse(list); System.out.println(list); } }Output:[JavaFx, Java, WebGL, OpenCV] [OpenCV, WebGL, Java, JavaFx]
Following are the various constructors provided by the StringBuffer class.S.N.Constructor & Description1StringBuffer()This constructs a string buffer with no characters in it and an initial capacity of 16 characters.2StringBuffer(CharSequence seq)This constructs a string buffer that contains the same characters as the specified CharSequence.3StringBuffer(int capacity)This constructs a string buffer with no characters in it and the specified initial capacity.4StringBuffer(String str)This constructs a string buffer initialized to the contents of the specified string.
To perform a reverse toggle split the words of a string, reverse each word using the split() method, change the first letter of each word to lower case and remaining letters to upper case.Example Live Demoimport java.lang.StringBuffer; public class ToggleReverse { public static void main(String args[]){ String sample = "Hello How are you"; String[] words = sample.split(" "); String result = ""; for(String word:words){ StringBuffer s = new StringBuffer(word); word = s.reverse().toString(); String firstSub = word.substring(0, 1); String secondSub = word.substring(1); result = result+firstSub.toLowerCase()+secondSub.toUpperCase()+" "; } System.out.println(result); } }OutputoLLEH wOH eRA uOY
SAP HANA system combines OLAP and OLTP processing into a single in-memory database and it removes the disk bottlenecks and offering groundbreaking performance. This ACID-compliant, in-memory columnar database stores provides data compression up to 11 times as compared to other conventional database, parallel processing across multiprocessor cores, and supports single instruction multiple data (SIMD) commands.
The synchronizedList(List list) method of the Collections class accepts a List object and returns a synchronized list backed by the specified list.Example:import java.util.ArrayList; import java.util.Collections; import java.util.LinkedHashSet; import java.util.Set; public class ArrayListSample { public static void main(String[] args){ ArrayList list = new ArrayList(); list.add("JavaFx"); list.add("Java"); list.add("WebGL"); list.add("OpenCV"); Set set = new LinkedHashSet(list); Collections.synchronizedList(list); System.out.println(list); } }Output:[JavaFx, Java, WebGL, OpenCV]
The StringBuffer and StringBuilder classes are used when there is a necessity to make a lot of modifications to Strings of characters.Unlike Strings, objects of type StringBuffer and String builder can be modified over and over again without leaving behind a lot of new unused objects.The StringBuilder class was introduced as of Java 5 and the main difference between the StringBuffer and StringBuilder is that StringBuilder’s methods do not thread safe (not synchronized).It is recommended to use StringBuilder whenever possible because it is faster than StringBuffer. However, if the thread safety is necessary, the best option is StringBuffer objects. Read More
SAP HANA also supports multitenant database container system, along with singe logical database. Using multitenant isolate databases, administration of HANA system becomes easy in a distributed environment.You can also implement cross tenant database structure where one application running on one HANA system can also run on logical database from other container system or two applications can use same single logical database hosted on different HANA systems.
You can sort an ArrayList using the sort() method of the Collections class this method accepts a list object as a parameter and sorts the contents of it in ascending order.Example:import java.util.ArrayList; import java.util.Collections; import java.util.LinkedHashSet; import java.util.Set; public class ArrayListSample { public static void main(String[] args) { ArrayList list = new ArrayList(); list.add("JavaFx"); list.add("Java"); list.add("WebGL"); list.add("OpenCV"); Set set = new LinkedHashSet(list); Collections.sort(list); System.out.println(list); } }Output:[Java, JavaFx, OpenCV, WebGL]