length of arrayList in java code example
Example 1: get number of items in arraylist java
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");
ArrayList listOfBanks = new ArrayList<>();
int size = listOfBanks.size();
System.out.println("size of array list after creating: " + size);
listOfBanks.add("Citibank");
listOfBanks.add("Chase");
listOfBanks.add("Bank of America");
size = listOfBanks.size();
System.out.println("length of ArrayList after adding elements: " + size);
listOfBanks.clear();
size = listOfBanks.size();
System.out.println("size of ArrayList after clearing elements: " + size);
}
}
Output
Welcome to Java Program to find length of array list
the size of array list after creating: 0
the length of ArrayList after adding elements: 3
the length of ArrayList after clearing elements: 0
Example 2: arraylist length java
aList.size()
Example 3: ArrayList size() method in java
import java.util.ArrayList;
public class ArrayListSizeMethodExample
{
public static void main(String[] args)
{
ArrayList al = new ArrayList();
int s = al.size();
System.out.println("size of ArrayList: " + s);
al.add(25);
al.add(64);
al.add(73);
s = al.size();
System.out.println("size of ArrayList after adding elements: " + s);
al.clear();
s = al.size();
System.out.println("size of ArrayList after clearing elements: " + s);
}
}
Example 4: arraylist length
list.size()
Example 5: java list length
ArrayList listOfBanks = new ArrayList<>();
int size = listOfBanks.size();
System.out.println("size of array list after creating: " + size);
Example 6: ArrayList size() method in java
import java.util.ArrayList;
public class ArrayListSizeMethodExample
{
public static void main(String[] args)
{
ArrayList al = new ArrayList();
int s = al.size();
System.out.println("size of ArrayList: " + s);
al.add("red");
al.add("blue");
al.add("green");
s = al.size();
System.out.println("size of ArrayList after adding elements: " + s);
al.clear();
s = al.size();
System.out.println("size of ArrayList after clearing elements: " + s);
}
}