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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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