文件更新保持保存旧信息而不是更新信息

Question

在我的程序中，我有一个显示按钮。一旦我点击它，信息就会显示并保存到文件中。

到目前为止，这是我的代码：

public void LoadFromFile(){

    FileWriter writer;

    try{
       writer = new FileWriter(fileName1, true);
       writer.write("Manager: "+Manager + System.getProperty("line separator "));
       writer.write("\nSortCode: "+SortCode + System.getProperty("line separator "));
       writer.write("\nWorkingHours: "+WorkingHours + System.getProperty("line separator "));
       writer.write("\nHouse No: "+LoadFromFile.getHouse_no()+System.getProperty("line separato " ));
       writer.write("\nHouse Name: "+LoadFromFile.getHouseName()+System.getProperty("line separator "));
       writer.write("\nStreet: "+LoadFromFile.getStreet()+System.getProperty("line separator "));
       writer.write("\nTown: "+LoadFromFile.getTown()+System.getProperty("line separator "));
       writer.write("\nCountry: "+LoadFromFile.getCountry()+System.getProperty("line separator "));
       writer.flush();
       writer.close();
       writer = null;


    }catch(IOException ioe){

    }


}

在我的程序中，我有一个保存按钮，因此当我编辑信息并保存时，它将更改并显示新信息。

然而，它只是将旧信息复制到文件而不是新文件中。

public void SaveToFile(){
       FileWriter writer;

        try{
           writer = new FileWriter(fileName1, true);
           writer.write("Manager: "+Manager + System.getProperty("line separator"));
           writer.write("\nSortCode: "+SortCode + System.getProperty("line separator"));
           writer.write("\nWorkingHours: "+WorkingHours + System.getProperty("line separator"));
           writer.write("\nHouse No: "+SaveToFile.getHouse_no()+System.getProperty("line separator"));
           writer.write("\nHouse Name: "+SaveToFile.getHouseName()+System.getProperty("line separator"));
           writer.write("\nStreet: "+SaveToFile.getStreet()+System.getProperty("line separator"));
           writer.write("\nTown: "+SaveToFile.getTown()+System.getProperty("line separator"));
           writer.write("\nCountry: "+SaveToFile.getCountry()+System.getProperty("line separator"));
           writer.flush();
           writer.close();
           writer = null;


        }catch(IOException ioe){

       }
}