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Removing Key-Value Pairs

If the key is present, the key-value pair will be removed and the value object will be returned. If the object is not present in the map, null will be returned. import java.util.HashMap; import java.util.Map; public class MainClass {   public static void main(String[] a) {     Map map = new HashMap();     map.put("key1", "value1");     map.put("key2", "value2");     map.put("key3", "value3");     map.remove("key3");     System.out.println(map);   } } {key1=value1, key2=value2}