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How to use addall in a list java
ArrayList ArrayListIdle = new ArrayList();
List<State> arrayState = new ArrayList<State>();

while(rs.next){

state = new State();

state.updateStateArray(arrayState);//This fuction mods the elemets of (arrayState);//This
state.setArrayStates(arrayState);//add a list of arrayState to the object state


//I have a array  and i want to add the element state with his arraylist(not the reference to)

ArrayListIdle.addAll(state);

// I tried with add , but in the next iteration the arrayState change.

}

ArrayList arrayListIdle = new ArrayList();


while(rs.next){

    state = new State();
    List<State> arrayState = new ArrayList<State>();

    state.updateStateArray(arrayState);//This fuction mods the elemets of (arrayState);//This
    state.setArrayStates(arrayState);//add a list of arrayState to the object state
    arrayListIdle.addAll(state);

}

while(rs.next) {
      List<State> arrayState = new ArrayList<State>();
      ...
 }