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/* Remove all values from Java HashMap example This Java Example shows how to remove all values from HashMap object or empty HashMap or clear HashMap using clear method. */ import java.util.HashMap; public class EmptyHashMapExample { public static void main(String[] args) { //create HashMap object HashMap hMap = new HashMap(); //add key value pairs to HashMap hMap.put("1","One"); hMap.put("2","Two"); hMap.put("3","Three"); /* To remove all values or clear HashMap use void clear method() of HashMap class. Clear method removes all key value pairs contained in HashMap. */ hMap.clear(); System.out.println("Total key value pairs in HashMap are : " + hMap.size()); } } /* Output would be Total key value pairs in HashMap are : 0 */ |
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