ssta@yaffle:~/Scratch$ cat Main.java
import java.util.HashMap;
import java.util.Map;

public class Main
{

      public static void main(String[] args)
     {

              Map<String, Integer>[] foo;
              foo=new HashMap[5];
              foo[0]=new HashMap<String, Integer>();
              foo[0].put("key", 1);
              System.out.println(""+foo[0].get("key"));
     }

}
ssta@yaffle:~/Scratch$ javac -Xlint:unchecked Main.java
Main.java:11: warning: [unchecked] unchecked conversion
found   : java.util.HashMap[]
required: java.util.Map<java.lang.String,java.lang.Integer>[]
              foo=new HashMap[5];
                  ^
1 warning
ssta@yaffle:~/Scratch$ java Main
1