Java.util.ArrayList.isEmpty() Method

Advertisements


Description

The java.util.ArrayList.isEmpty() method returns true if this list contains no elements.

Declaration

Following is the declaration for java.util.ArrayList.isEmpty() method

public boolean isEmpty()

Parameters

  • NA

Return Value

This method returns true if this list contains no elements, else false.

Exception

  • NA

Example

The following example shows the usage of java.util.ArrayList.isEmpty():

package com.tutorialspoint;

import java.util.ArrayList;

public class ArrayListDemo {
   public static void main(String[] args) {
      
    // create an empty array deque with an initial capacity
    ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

    // use add() method to add elements in the deque
    arrlist.add(25);
    arrlist.add(10);
    arrlist.add(20);
    arrlist.add(35);        
           
    boolean retval = arrlist.isEmpty();
    if (retval == true) {
      System.out.println("list is empty");
    }
    else {
      System.out.println("list is not empty");
    }
	   
   // printing all the elements available in list
   for (Integer number : arrlist) {
     System.out.println("Number = " + number);
   }
  }
}

Let us compile and run the above program, this will produce the following result:

list is not empty
Number = 25
Number = 10
Number = 20
Number = 35



Advertisements
Advertisements