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Java IdentityHashMap clear() method
Clear the IdentityHashMap using the clear() method.
Create an IdentityHashMap and add elements to it −
Map<String, Integer> m = new IdentityHashMap<String, Integer>();
m.put("1", 100);
m.put("2", 200);
m.put("3", 300);
m.put("4", 150);
m.put("5", 110);
m.put("6", 50);
m.put("7", 90);
m.put("8", 250);Now, let us use the clear() method to remove all the elements −
m.clear()
The following is an example to remove all elements in IdentityHashMap in Java −
Example
import java.util.*;
public class Demo {
public static void main(String[] args) {
Map<String, Integer> m = new IdentityHashMap<String, Integer>();
m.put("1", 100);
m.put("2", 200);
m.put("3", 300);
m.put("4", 150);
m.put("5", 110);
m.put("6", 50);
m.put("7", 90);
m.put("8", 250);
m.put("9", 350);
m.put("10", 450);
System.out.println("IdentityHashMap elements
"+ m);
System.out.println("Size = " + m.size());
// remove all elements
m.clear();
System.out.println("
Updated IdentityHashMap elements = "+ m);
System.out.println("Size = " + m.size());
}
}Output
IdentityHashMap elements
{2=200, 4=150, 9=350, 7=90, 10=450, 6=50, 5=110, 8=250, 1=100, 3=300}
Size = 10
Updated IdentityHashMap elements = {}
Size = 0
Updated on: 30-Jul-2019
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