Java HashMap.isEmpty()
Syntax
HashMap.isEmpty() has the following syntax.
public boolean isEmpty()
Example
In the following code shows how to use HashMap.isEmpty() method.
/*from ww w .ja v a 2 s .c om*/
import java.util.HashMap;
public class Main {
public static void main(String args[]) {
HashMap<Integer, String> newmap = new HashMap<Integer, String>();
// populate hash map
newmap.put(1, "tutorials");
newmap.put(2, "from");
newmap.put(3, "java2s.com");
// check if map is empty
boolean val=newmap.isEmpty();
// check the boolean value
System.out.println("Is hash map empty: " + val);
}
}
The code above generates the following result.
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