public class PaperPage
{
BookPage bookPages[];
int pageCount=0;
String txtFile;
public PaperPage(String txtFile)
{
this.txtFile=txtFile;
}
public BookPage incPage()
{
pageCount++;
bookPages=new BookPage[pageCount];
return bookPages[pageCount-1];
}
}
public class BookPage
{
List pageList=new ArrayList();
int pageNum; public BookPage()
{}
}//调用PaperPage paperObj=new PaperPage(txtFile);
BookPage page=paperObj.incPage();
if(page==null)
System.out.println("page is null");//这个返回值,老是null
{
BookPage bookPages[];
int pageCount=0;
String txtFile;
public PaperPage(String txtFile)
{
this.txtFile=txtFile;
}
public BookPage incPage()
{
pageCount++;
bookPages=new BookPage[pageCount];
return bookPages[pageCount-1];
}
}
public class BookPage
{
List pageList=new ArrayList();
int pageNum; public BookPage()
{}
}//调用PaperPage paperObj=new PaperPage(txtFile);
BookPage page=paperObj.incPage();
if(page==null)
System.out.println("page is null");//这个返回值,老是null
bookPages=new BookPage[pageCount];下面+上bookPages[pageCount-1]=new BookPage();//初始化了数组,没有初始化数组对象