Why does my JOptionPane repeatedly prompt for Major Sheet status from my code below

Question

I'm having an infinite while loop issue, no matter what I type in even if it is "Filed" or "Incomplete" the loop keeps re prompting and I can't figure out why.

strMajorSheet = JOptionPane.showInputDialog(null,"What is the advisee's major sheet status? (Filed/Incomplete)",
                "Advisee's Major Sheet",3);

if(strMajorSheet == "Filed" || strMajorSheet == "Incomplete")
                    {

                        switch(strMajorSheet)
                        {
                            case "Filed":
                                blnMajorSheet = true;
                            case "Incomplete":
                                blnMajorSheet = false;


                        }
                    }
                    else
                    {
                        while(strMajorSheet != "Filed" && strMajorSheet != "Incomplete")
                        {
                            strMajorSheet = JOptionPane.showInputDialog(null,"What is the advisee's major sheet status? (Filed/Incomplete)",
                                "Advisee's Major Sheet",3);


                        }

Answer 1

please don't compare String using ==

change it to

if(strMajorSheet.equals("Filed") || strMajorSheet.equals("Incomplete"))
......

while(!strMajorSheet.equals("Filed") && !strMajorSheet.equals("Incomplete"))
......