• Java Data Structures Tutorial

Verifying if the Vector is empty



The Vector class of the java.util package provides a isEmpty() method. This method verifies whether the current vector is empty or not. If the given vector is empty this method returns true else it returns false.

Example

import java.util.Vector;

public class Vector_IsEmpty {
   public static void main(String args[]) {
      Vector vect = new Vector();
      vect.addElement("Java");
      vect.addElement("JavaFX");
      vect.addElement("HBase");
      vect.addElement("Neo4j");
      vect.addElement("Apache Flume");
      System.out.println("Elements of the vector :"+vect);
      boolean bool1 = vect.isEmpty();
      
      if(bool1==true) {
         System.out.println("Given vector is empty");
      } else {
         System.out.println("Given vector is not empty");    	  
      }
      vect.clear();
      boolean bool2 = vect.isEmpty();
      System.out.println("cleared the contents of the vector");       
      
      if(bool2==true) {
         System.out.println("Given vector is empty");
      } else {
         System.out.println("Given vector is not empty");    	  
      }  
   }
}

Output

Elements of the vector :[Java, JavaFX, HBase, Neo4j, Apache Flume]
Given vector is not empty
cleared the contents of the vector
Given vector is empty
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