Java Utility Library

Java Vector - trimToSize() Method

The java.util.Vector.trimToSize() method is used to trim the capacity of the vector to be the vector's current size. If the capacity of this vector is larger than its current size, then the capacity is changed to equal the size.

Syntax

public void trimToSize()

Parameters

No parameter is required.

Return Value

void type.

Exception

NA.

Example:

In the example below, the java.util.Vector.trimToSize() method is used to trim the capacity of the vector to be the vector's current size.

import java.util.*;

public class MyClass {
  public static void main(String[] args) {
    //creating a vector
    Vector<Integer> Vec = new Vector<Integer>(10);

    //populating vector
    Vec.add(10);
    Vec.add(20);
    Vec.add(30);   

    //print the capacity of the vector
    System.out.println("Before trimToSize, Vec capacity: "+ Vec.capacity());

    //trim the capacity of the vector
    Vec.trimToSize();

    //print the capacity of the vector
    System.out.println("After trimToSize, Vec capacity: "+ Vec.capacity());
  }
}

The output of the above code will be:

Before trimToSize, Vec capacity: 10
After trimToSize, Vec capacity: 3

❮ Java.util - Vector