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Java 2021-09-23 23:25:03
Polymorphisim
Polymorphism means objects behave in different forms. ■ It occurs when parent class/interface calls to child class' objects Sub class can never be the reference type of Super Class Object ■ The reference of an object decides what is accessible. ■ Abstr... Add solution -
Java 2021-09-22 01:18:02
filtering out unique values from a list in java
ArrayList<String> listWithDuplicateValues = new ArrayList<>(); list.add("first"); list.add("first"); list.add("second"); ArrayList uniqueList = (ArrayList) listWithDuplicateValues.stream().distinct().collect(Coll... Add solution -
Java 2021-09-20 10:15:02
arraylist length
import java.util.ArrayList; /* * Java Program to find the length of ArrayList. * */ public class ArrayListDemo{ public static void main(String[] args) { System.out.println("Welcome to Java Program to find the length of array list"); ... Add solution -
Java 2021-09-18 13:22:02
convert arraylist to csv file java
import java.util.ArrayList; import java.io.BufferedWriter; import java.io.FileWriter; import java.io.File; import java.io.IOException; class test { public static void main(String arg[])throws IOException { ArrayList<String> list1 = n... Add solution -
Java 2021-09-14 19:46:02
generic variable java
List<String> yourList=new ArrayList<>();//short form of Arraylist<String> as the compiler infers the <String> from the left side of the assignment yourList.add("Hello"); yourList.add(123);//compiler Error String firstElem... Add solution -
Java 2021-09-14 18:44:02
java return new instance of generic type
public static <E> void append(List<E> list, Class<E> cls) throws Exception { E elem = cls.newInstance(); // OK list.add(elem); } //You can invoke the append method as follows: List<String> ls = new ArrayList<>(); ap... Add solution
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