I have two hashmap of type
Hashmap<String,Object[]> hasOne = new Hashmap<String,Object[]>();
Hashmap<String,Object[]> hasTwo = new Hashmap<String,Object[]>();
I've added values in both of them,
hasOne.put("anyKey", new Object[1,"Two",3.14]);
hasTwo.put("anyKey", new Object[1,"Two"]);
My requirement is I need to compare values from the object array of both hashmaps and need to print missing data from the object array of the second hashmap ( Ex. 3.14 is missing in the second array on comparing new Object[1,"Two",3.14]
&& new Object[1,"Two"]
).
Using Arrays.asList(hasOne.get("anyKey"));
// will get details of object array but i'm not sure how to iterate over that array.
PFB code snippet
Map<String, Object[]> one = new HashMap<String, Object[]>();
Map<String, Object[]> two = new HashMap<String, Object[]>();
one.put("firstArray", new Object[] {1, "Two", 3.14});
two.put("secondArray", new Object[] {1, "Two"});
for(int k=0;k<one.size();k++)
{
System.out.println(Arrays.asList(one.get("firstArray")));
}
Try this. References I used are:
// create and insert into maps
Map<String, Object[]> one = new HashMap<String, Object[]>();
Map<String, Object[]> two = new HashMap<String, Object[]>();
one.put("firstArray", new Object[] {1, "Two", 3.14});
two.put("secondArray", new Object[] {1, "Two"});
for(int k=0;k<one.size();k++)
{
List<Object> arrList1 = new ArrayList<>(Arrays.asList(one.get("firstArray"))); // get the value from the map "one" as arrayList
List<Object> arrList2 = new ArrayList<>(Arrays.asList(two.get("secondArray"))); // get the value from the map "two" as arrayList
// System.out.println(arrList1 + " " + arrList2);
arrList1.removeAll(arrList2); // removes all different values as you require
System.out.println(arrList1);
}
I think your requirement is that for each key in the first map you want to find any objects in the value array which are not in the second map:
for (String entry: one.entrySet()) {
for (Object val: entry.getValue()) {
if (Arrays.stream(two.get(entry.getKey()).noneMatch(val::equals))) {
...
}
}
}
You can do all this in nested streams but explicit for
loops are easier to understand.
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