If statement not showing as true despite the two strings being compared are identical

Question

Hi so im comparing two strings that visually look the same but for some reason the code is not executing the if statement. both temp day and key are showing as 2022-04-04

                             Results = (HashMap<String, Map<String, Double>>) task.getResult().getValue();
                    for(int y = 0; y < Dates.size(); y++) {
                        for (Map.Entry<String, Map<String, Double>> entry : Results.entrySet()) {
                        key = entry.getKey();
                        value = (HashMap<String, Double>) entry.getValue();
                        String TempDay = Dates.get(0);
                        //makeToast(TempDay);
                            
                        if(key == TempDay){
                            makeToast(key + " " + TempDay);

                          for(Map.Entry<String, Double> entry2: value.entrySet()){
                             String key2 = entry2.getKey();

                             Double value2 = entry2.getValue();
                              Matches.put(key2,value2);


                            }
                         }


                        }
                    }


                }