📄 tij0106.html

📁 学习java的经典书籍
💻 HTML
字号:
<html><body>

<table width="100%"><tr>
<td>
<a href="http://www.bruceeckel.com/javabook.html">Bruce Eckel's Thinking in Java</a>
</td>
<td align="right">
<a href="tij_c.html">Contents</a> | <a href="tij0105.html">Prev</a> | <a href="tij0107.html">Next</a>
</td>
</tr></table>
<hr>

<H2 ALIGN=LEFT>
Exercises</H2>
<OL>
<LI><FONT FACE="Carmina Md BT" SIZE=5 COLOR="Black">	</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Create
a class with a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>main(&#160;)</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
that throws an object of class 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>Exception</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
inside a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>try</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
block. Give the constructor for 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>Exception</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
a string argument. Catch the exception inside a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>catch</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
clause and print out the string argument. Add a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>finally</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
clause and print a message to prove you were there.
</FONT><LI><FONT FACE="Carmina Md BT" SIZE=5 COLOR="Black">	</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Create
your own exception class using the 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>extends</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
keyword. Write a constructor for this class that takes a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>String</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
argument and stores it inside the object with a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>String</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
handle. Write a method that prints out the stored 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>String</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">.
Create a try-catch clause to exercise your new exception.
</FONT><LI><FONT FACE="Carmina Md BT" SIZE=5 COLOR="Black">	</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Write
a class with a method that throws an exception of the type created in Exercise
2. Try compiling it without an exception specification to see what the compiler
says. Add the appropriate exception specification. Try out your class and its
exception inside a try-catch clause.
</FONT><LI><FONT FACE="Carmina Md BT" SIZE=5 COLOR="Black">	</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">In
chapter 5, find the two programs called 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>Assert.java</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
and modify these to throw their own type of exception instead of printing to 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>System.err</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">.
This exception should be an inner class that extends RuntimeException.
</FONT></OL><DIV ALIGN=LEFT><FONT FACE="Da Vinci Extras" SIZE=39 COLOR="Black">v</FONT><a name="Chapter_10"></a><a name="_Toc375545381"></a><a name="_Toc407441454"></a><a name="_Toc408018609"></a><P></DIV>

<div align="right">
<a href="tij_c.html">Contents</a> | <a href="tij0105.html">Prev</a> | <a href="tij0107.html">Next</a>
</div>
</body></html>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -