The size() method of java.util.ArrayList class is used to get the number of elements in this list.
Syntax:
public int size()
Returns Value: This method returns the number of elements in this list.
Below are the examples to illustrate the size() method.
Example 1:
// Java program to demonstrate // size() method // for Integer value import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
try {
// Creating object of ArrayList<Integer>
ArrayList<Integer>
arrlist = new ArrayList<Integer>();
// Populating arrlist1
arrlist.add( 1 );
arrlist.add( 2 );
arrlist.add( 3 );
arrlist.add( 4 );
arrlist.add( 5 );
// print arrlist
System.out.println( "Before operation: "
+ arrlist);
// getting total size of arrlist
// using size() method
int size = arrlist.size();
// print the size of arrlist
System.out.println( "Size of list = "
+ size);
}
catch (IndexOutOfBoundsException e) {
System.out.println( "Exception thrown: "
+ e);
}
}
} |
Output:
Before operation: [1, 2, 3, 4, 5] Size of list = 5
Example 2:
// Java program to demonstrate // size() method // for String value import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
try {
// Creating object of ArrayList<Integer>
ArrayList<String>
arrlist = new ArrayList<String>();
// Populating arrlist1
arrlist.add( "A" );
arrlist.add( "B" );
arrlist.add( "C" );
// print arrlist
System.out.println( "Before operation: "
+ arrlist);
// getting total size of arrlist
// using size() method
int size = arrlist.size();
// print the size of arrlist
System.out.println( "Size of list = "
+ size);
}
catch (IndexOutOfBoundsException e) {
System.out.println( "Exception thrown: "
+ e);
}
}
} |
Output:
Before operation: [A, B, C] Size of list = 3