This method is used to associate the specified value with the specified key in this map.
Syntax:Library: java.util.HashMap
public V put(K key, V value)
Example:import java.util.*;
public class HashMapDemo {
public static void main(String args[]) {
// create hash map
HashMap newmap = new HashMap();
// populate hash map
newmap.put(1, "tutorials");
newmap.put(2, "point");
newmap.put(3, "is best");
System.out.println("Map value before change: "+ newmap);
// put new values at key 3
String prevvalue=(String)newmap.put(3,"is great");
// check returned previous value
System.out.println("Returned previous value: "+ prevvalue);
System.out.println("Map value after change: "+ newmap);
}
}
Output:
Map value before change: {1=tutorials, 2=point, 3=is best}
Returned previous value: is best
Map value after change: {1=tutorials, 2=point, 3=is great}
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