使用重载的构造函数就出错!!!
book.java 如下:
package library;
public class Book
{
private String title;
public Book(){}
public Book(String t)
{
this.title=t;
}
public String getTitle()
{
return title;
}
public void setTitle(String title)
{
this.title=title;
}
}
bookpage.jsp 如下:
<HTML>
<!-- -------------------------------- -->
<HEAD>
<TITLE>A Simple Class</TITLE>
</HEAD>
<!-- -------------------------------- -->
<BODY>
<%
//下面语句没有异常
library.ChildrenBook book=new library.ChildrenBook();
//如果替换成下面语句将产生异常,为什么???
library.ChildrenBook book=new library.ChildrenBook("sdkjf");
%>
</BODY>
<!-- -------------------------------- -->
</HTML>