Map: get(Object key)

 
import java.util.HashMap;
import java.util.Map;

public class Main{
  public static void main(String[] a) {

    Map<String,String> map = new HashMap<String,String>();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");

    System.out.println(map.get("key2"));
  }
}