Ans :- these are the difference between String Buffer and String Builder s.No String Buffer String Builder 1. StringBuffer is Synchronized StringBuilder is non Synchronized 2. StringBuffer is thread safe StringBuilder is not thread safe 3 StringBuffer is less efficient …
What is the difference between StringBuffer and Stringbuilder ? Read more »
Solution :- SELECT e.empId,e.empName,e.cityId,c.cityName,c.stateName FROM Employee eJOIN City c ON e.cityId = c.cityIdWHERE e.empId =100;
Happy New Year 2024
Ans :- JDK :- JDK stands for “Java Development Kit” and which is the collection of the following : – 1. JavaCompiler 2.JVM 3.Java Library JRE :- JRE stands for “Java Runtime environment” which is the collection of JVM and …
Like if we have – a=20; b=30; I want a=30; and b=20; SOLUTION :- package p1; public class SwapNumbers { }
SOLUTION :- package mv; import java.util.ArrayList;import java.util.Collections;import java.util.List; public class AscendingAndDescendingIntegers { }
Ans:- flatMap() :- flatMap() transform each element and flattern the resulting collection into a single combined collection. Example of flatMap():- package v1;import java.util.ArrayList; import java.util.Arrays; import java.util.List;import java.util.stream.Collectors; public class FlatMapExample {public static void main(String[] args) { List<List<Integer>> list=new ArrayList<>(); …
Solution :- we will use Map to find Count of element using stream package p2; import java.util.Arrays; import java.util.List; import java.util.Map; import java.util.stream.Collectors; public class CountOfElement { public static void main(String[] args) { List<Integer> list=Arrays.asList(1,1,2,3,3,5,5,7,8,9,9); Map<Integer,Long> map=list.stream().collect(Collectors.groupingBy(i->i,Collectors.counting())); System.out.println(map); map=map.entrySet().stream().filter(e->e.getValue()>1).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue)); …