Java Collection Tutorial - Java ArrayList.trimToSize()

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Syntax

ArrayList.trimToSize() has the following syntax.

public void trimToSize()

Example

In the following code shows how to use ArrayList.trimToSize() method.

//from ww  w . ja  va  2s .  co m
import java.util.ArrayList;
import java.util.Arrays;

public class Main{
  public static void main(String args[]) {

    ArrayList<String>  arrList = 
        new ArrayList<>(Arrays.asList("a","a","a","from java2s.com"));
  
    // Trim the arraylist
    arrList.trimToSize();

    System.out.println(arrList);
  }
}

The code above generates the following result.

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