这是我的while循环，大的一个，然后我们有一个for循环和一个嵌套的if，如果问题是if中的代码继续循环并使程序崩溃。当我运行我的代码并添加一个现有的id号来验证它时，它会不断地发送错误消息，说明它存在，我无法确定循环的问题在哪里

while (exist>=0){
    exist=0;
    for(int i=0; i<idArr.length; i++){
        if(AddID.getText().equals(idArr[i])){
            exist=1;
            JOptionPane.showMessageDialog(null, "ID already exists!", "Clinic System", JOptionPane.ERROR_MESSAGE);
            AddID.setText("");               
            addName.setText("");
            DOBADD.setText("");
            Address.setText("");                              
            PhoneNum.setText("");
            GenderAdd.setText("");
            break;                                
        }                            
    }
    if(exist==0) {
        try{    
        myconn = DriverManager.getConnection(url, user, password);
        //mystatShop = myconShop.createStatement();
        //myresShop = mystatShop.executeQuery("INSERT INTO patient_test VALUES (?, ?)");
        String SQL= "INSERT INTO PATIENT_INFO  VALUES (?,?,?,?,?,?)";
        PreparedStatement pstate = myconn.prepareStatement(SQL);
        pstate.setString(1,AddID.getText());
        pstate.setString(2, addName.getText());
        pstate.setString(3, DOBADD.getText());
        pstate.setString(4, Address.getText());                             
        pstate.setString(5, PhoneNum.getText());
        pstate.setString(6, GenderAdd.getText());

        pstate.executeUpdate();
        JOptionPane.showMessageDialog(null,"Insertion Successful");
        AddID.setText("");               
        addName.setText("");
        DOBADD.setText("");
        Address.setText("");
        GenderAdd.setText("");
        PhoneNum.setText("");

        myconn.close();
        }
        catch(Exception e){
            System.out.println(e.getMessage());
        }
        break;
    }
}