FileOutputStream访问被拒绝：JAVA

import java.io.*;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.PdfWriter;

@org.eclipse.jdt.annotation.NonNullByDefault(true)
public class HelloWorld {      
    public static final String RESULT = "C:UsersadministratorPicturestuto";

    @SuppressWarnings("resource")
    public static void main(String[] args) throws DocumentException,IOException {
        Document document = new Document();
        PdfWriter.getInstance(document,new FileOutputStream(RESULT));
        document.open();
        document.add(new Paragraph("Hello World!"));
        document.close(); 
    }
}

此代码返回一条错误消息,如下所示.

Exception in thread "main" java.io.FileNotFoundException: C:Usersvalentin.schaeferPicturestuto (Access is denied)
    at java.io.FileOutputStream.open(Native Method)
    at java.io.FileOutputStream.<init>(Unknown Source)
    at java.io.FileOutputStream.<init>(Unknown Source)
    at HelloWorld.main(HelloWorld.java:25)

然而,我是计算机管理员,我通常拥有所有权限帐户.我不明白他为什么要退我访问被拒绝.