NavigableSet clear() method in Java
Last Updated :
30 Sep, 2019
The Java.util.NavigableSet.clear() method is used to remove all the elements from a NavigableSet. Using the clear() method only clears all the element from the NavigableSet and not deletes the NavigableSet. In other words, we can say that the clear() method is used to only empty an existing NavigableSet.
Syntax:
void clear()
Parameters: The method does not take any parameter
Return Value: The method does not returns any value.
Below program illustrate the Java.util.method.clear() method:
import java.io.*;
import java.util.*;
public class NavigableSetDemo {
public static void main(String args[])
{
NavigableSet<String> st = new TreeSet<String>();
st.add( "Welcome" );
st.add( "To" );
st.add( "Geeks" );
st.add( "4" );
st.add( "Geeks" );
System.out.println( "Initial NavigableSet: " + st);
st.clear();
System.out.println( "The final NavigableSet: " + st);
}
}
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Output:
Initial NavigableSet: [4, Geeks, To, Welcome]
The final NavigableSet: []
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