java - How to put in map according to array? -


i've got 2 maps , 1 array. first map empty , second full of data. array includes string keys. want put data second map 1st if there equals keys in array.

example:

1st map: empty

2nd map(key,value): foo,1; bar,2; java,3; pojo,4; tom,5; jerry,6;

array(string): foo,java,pojo;

so need put (foo,1;java,3;pojo,4;) in 1st map.

public static void main(string[] args) throws ioexception {     hashmap<string, integer> map1= new hashmap<string, integer>();     hashmap<string, integer> map2= new hashmap<string, integer>();     map2.put("foo", 1);     map2.put("bar", 2);     map2.put("java", 3);     map2.put("pojo", 4);     map2.put("tom", 5);     map2.put("jerry", 6);      string[] arr={"foo","java","pojo"};      (string arritem : arr)     {         map1.put(arritem, map2.get(arritem));         system.out.println(arritem);         system.out.println(map2.get(arritem));     }  }

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