Java Collection Tutorial - Java Map.isEmpty()

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Syntax

Map.isEmpty() has the following syntax.

boolean isEmpty()

Example

In the following code shows how to use Map.isEmpty() method.

import java.util.HashMap;
import java.util.Map;
/* w w w  .  ja va2s.c  o  m*/
public class Main {
  public static void main(String[] a) {
    Map<String,String> map = new HashMap<String,String>();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");
    map.clear();

    System.out.println(map.isEmpty());
  }
}

The code above generates the following result.

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