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");
System.out.println(map);
}
}
{key1=value1, key3=value3, key2=value2}