Java TreeMap.putAll(Map <? extends K ,? extends V > map)
Syntax
TreeMap.putAll(Map <? extends K ,? extends V > map) has the following syntax.
public void putAll(Map <? extends K ,? extends V> map)
Example
In the following code shows how to use TreeMap.putAll(Map <? extends K ,? extends V > map) method.
/* w w w . jav a 2 s . co m*/
import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
TreeMap<Integer, String> treemap = new TreeMap<Integer, String> ();
TreeMap<Integer, String> treemap_putall = new TreeMap<Integer, String> ();
// populating tree map
treemap.put(2, "two");
treemap.put(1, "one");
treemap.put(3, "three");
treemap.put(6, "six");
treemap.put(5, "from java2s.com");
treemap_putall.put(1, "1");
treemap_putall.put(2, "2");
treemap_putall.put(7, "7");
System.out.println("Value before modification: "+ treemap);
// Putting 2nd map in 1st map
treemap.putAll(treemap_putall);
System.out.println("Value after modification: "+ treemap);
}
}
The code above generates the following result.
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