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来自「清华JAVA教程。不用多说了吧」· HTM 代码 · 共 71 行
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<html><head><title>JAVA编程语言</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><link rel="stylesheet" href="../../../css/text.css" type="text/css"></head><body bgcolor="#FFFFFF" text="#000000" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0" ><table width="100%" border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF"> <tr> <td valign="top"> <table width="95%" border="0" cellspacing="0" cellpadding="0" align="center" bgcolor="#FFFFFF"> <tr> <td valign="top"> <p> <span class="zhongdian"> 1．不同类型数据间的优先关系如下：<a name="01"></a></span><span class="pt9-black"><br> <br> 低------------------------------------------->高<br> byte,short,char-> int -> long -> float -> double<br> <br> </span><span class="zhongdian">2．自动类型转换规则<a name="02"></a></span><span class="pt9-black"><br> <br> 整型,实型,字符型数据可以混合运算。运算中，不同类型的数据先转化为同一类型，然后进行运算，转换从低级到高级；</span></p> <table width="100%" border="0" cellspacing="1" cellpadding="0" bgcolor="006633"> <tr bgcolor="C1FFE0"> <td width="52%"> <div align="center"><b><span class="pt9-black">操作数1类型</span></b></div> </td> <td width="22%"> <div align="center"><b><span class="pt9-black">操作数2类型</span></b></div> </td> <td width="26%"> <div align="center"><b><span class="pt9-black">转换后的类型 </span></b></div> </td> </tr> <tr bgcolor="#FFFFFF"> <td width="52%"> <span class="pt9-black">byte、short、char</span></td> <td width="22%"> <span class="pt9-black"> int</span></td> <td width="26%"> <span class="pt9-black"> int </span></td> </tr> <tr bgcolor="#FFFFFF"> <td width="52%"> <span class="pt9-black">byte、short、char、int</span></td> <td width="22%"> <span class="pt9-black"> long</span></td> <td width="26%"> <span class="pt9-black"> long</span></td> </tr> <tr bgcolor="#FFFFFF"> <td width="52%"> <span class="pt9-black">byte、short、char、int、long</span></td> <td width="22%"> <span class="pt9-black"> float</span></td> <td width="26%"> <span class="pt9-black"> float</span></td> </tr> <tr bgcolor="#FFFFFF"> <td width="52%"> <span class="pt9-black">byte、short、char、int、long、float</span></td> <td width="22%"> <span class="pt9-black"> double</span></td> <td width="26%"> <span class="pt9-black"> double</span></td> </tr> </table> <p><span class="pt9-black"> <br> </span><span class="zhongdian">3．强制类型转换<a name="03"></a></span><span class="pt9-black"><br> <br> 高级数据要转换成低级数据，需用到强制类型转换，如：<br> int i;<br> byte b=(byte)i; <font color="#009933">/*把int型变量i强制转换为byte型*/</font><br> </span> </p> </td> </tr> </table> </td> </tr></table></body></html>⌨️ 快捷键说明
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