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Remove all elements from Java NavigableMap
Use the clear() method to remove all elements from NavigableMap in Java.
First, let us create NavigableMap −
NavigableMap<Integer, String> n = new TreeMap<Integer, String>();
Add elements to the NavigableMap −
n.put(5, "Tom"); n.put(9, "John"); n.put(14, "Jamie"); n.put(1, "Tim"); n.put(4, "Jackie"); n.put(15, "Kurt"); n.put(19, "Tiger"); n.put(24, "Jacob");
Remove all elements −
n.clear();
The following is an example to remove all elements from Java NavigableMap −
Example
import java.util.*;
public class Demo {
public static void main(String[] args) {
NavigableMap<Integer, String> n = new TreeMap<Integer, String>();
n.put(5, "Tom");
n.put(9, "John");
n.put(14, "Jamie");
n.put(1, "Tim");
n.put(4, "Jackie");
n.put(15, "Kurt");
n.put(19, "Tiger");
n.put(24, "Jacob");
System.out.println("NavigableMap elements...
"+n);
System.out.println("Size = "+n.size());
// remove all elements
n.clear();
System.out.println("
Updated NavigableMap elements = "+n);
System.out.println("Size = "+n.size());
}
}Output
NavigableMap elements...
{1=Tim, 4=Jackie, 5=Tom, 9=John, 14=Jamie, 15=Kurt, 19=Tiger, 24=Jacob}
Size = 8
Updated NavigableMap elements = {}
Size = 0
Updated on: 25-Jun-2020
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