Question

Remove value from list in java containing map

I am having list in this form:

List: [{id=1,c_id=3,value=5},{id=1,c_id=2,value=5},{id=1,c_id=3,value=5},{id=2,c_id=1,value=5},       
        {id=2,c_id=null,value=5}}];

In result I am trying to get

List: [{id=1,c_id=3,value=5},,{id=1,c_id=2,value=5},{id=2,c_id=1,value=5}}]

For same id if c_id is same it should be removed and also if c_id is null it should be removed.

Answer 1

You can do

for(Iterator<Map<String, Object>> iter = list.iterator(); iter.hasNext(); ) {
    Map<String, Object> map = iter.next();
    Object c_id = map.get("c_id");
    if (c_id == null || c_id.equals(matching_c_id))
        iter.remove();
}