Return anonymous object in java

Question

In JavaScript we can do:

function foo() {
   ...

    return {
        attr1 : ... ,
        attr2 : ...,
       };
}

But what is its equivalent in Java?

Because I want to return a custom Json object from my controller after an ajax call and I want to create a new bean.

Answer 1

As Java dictates, you should create a new class and convert it to JSON. Also, you can use Map<String,Object> to accomplish the same thing. To generate following JSON:

{
    "attr1":1,
    "attr2":2
}

you can use following code:

 Map<String,Object> map = new HashMap<>(3);
 map.put("attr1", 1);
 map.put("attr2", 2);

and convert it to JSON.

PS: HashMap in Java causes your heap to increase and unnecessary garbage, so I specified just enough size to keep two elements.