Unique Login and SQLiteConstraintException in Android :  I have the following code for inserting login information into a SQL Lite database.

    public boolean addLogin(Login login) {
            SQLiteDatabase Db = this.getWritableDatabase();
            ContentValues values = new ContentValues();
            values.put(TABLE1_COL1, login.getUser_Name());
            values.put(TABLE1_COL2, login.getPassword());
            try {
                Db.insert(TABLE1_NAME, null, values);
            } catch (SQLiteConstraintException ex) {
                System.out.println("here");
                return false;
            }
            return true;
    
        }

When I try to test my code with this method executed in my main activity:

     //Testing Adding Logins
            Login login1 = new Login("having1", "fun1");
            Login login2 = new Login("having1", "fun1");
            db.addLogin(login1);
            db.addLogin(login2);

I get the error:

  

      E/SQLiteDatabase: Error inserting User_Names=having1 Password=fun1
       android.database.sqlite.SQLiteConstraintException: UNIQUE constraint failed: Login_Table.User_Names (code 1555)

But isn't this what the try and catch statement is supposed to prevent? I also do not see the  `System.out.println("here")` statement. Any insights as to why this is happening much appreciated.
