Java IdentityHashMap.putAll(Map <? extends K ,? extends V > m)
Syntax
IdentityHashMap.putAll(Map <? extends K ,? extends V > m) has the following syntax.
public void putAll(Map <? extends K ,? extends V > m)
Example
In the following code shows how to use IdentityHashMap.putAll(Map <? extends K ,? extends V > m) method.
//ww w.j a v a 2 s . c o m
import java.util.IdentityHashMap;
public class Main {
public static void main(String args[]) {
IdentityHashMap<Integer,String> ihmap1 = new IdentityHashMap<Integer,String>();
IdentityHashMap<Integer,String> ihmap2 = new IdentityHashMap<Integer,String>();
// populate the ihmap1
ihmap1.put(1, "from");
ihmap1.put(2, "java2s.com");
ihmap1.put(3, "tutorial");
System.out.println("Value of ihmap1 before: " + ihmap1);
System.out.println("Value of ihmap2 before: " + ihmap2);
// put all values from ihmap1 to ihmap2
ihmap2.putAll(ihmap1);
System.out.println("Value of ihmap2 after: " + ihmap2);
}
}
The code above generates the following result.
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