The size() method is a built-in method in the Java programming language that is defined in the AbstractSet class and returns the number of elements present in the set.

Syntax:

public int size()

Returns:

The method returns an integer that represents the number of elements in the set.

Example:

Let's consider a situation where we have a set called "colors" that contains the names of some popular colors.

import java.util.*;

public class ExampleSet { public static void main(String[] args) { Set colors = new HashSet();

  //adding elements to the set
  colors.add("Red");
  colors.add("Yellow");
  colors.add("Blue");
  colors.add("Green");
  
  //displaying the number of elements in the set
  System.out.println("Number of elements in the set: " + colors.size());

} }

Output:

Number of elements in the set: 4

In the above example, we have created a set called "colors" and added four color names to it. The size() method is then called on the set to get the number of elements present in it, which is printed to the console as "Number of elements in the set: 4". 免责声明：本文内容通过AI工具匹配关键字智能整合而成，仅供参考，火山引擎不对内容的真实、准确或完整作任何形式的承诺。如有任何问题或意见，您可以通过联系service@volcengine.com进行反馈，火山引擎收到您的反馈后将及时答复和处理。