📄 csdn_文档中心_一步一步学java(第四课 方法、值传递、this关键字) 续.htm
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</SPAN>p.setAge(18);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>p.display();<SPAN
style="mso-tab-count: 2">
</SPAN></FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>}</FONT></SPAN></P>
<P class=a2
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm; mso-char-indent-count: 0"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1">
</SPAN>}</FONT></SPAN></P>
<P class=a2
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm; mso-char-indent-count: 0"><SPAN
lang=EN-GB><o:p><FONT size=3> </FONT></o:p></SPAN></P>
<P class=a2
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm; mso-char-indent-count: 0"><SPAN
lang=EN-GB><o:p><FONT size=3> </FONT></o:p></SPAN></P>
<P class=a
style="MARGIN: 6pt 0cm; TEXT-INDENT: 0cm; mso-char-indent-count: 0"><FONT
size=3><SPAN
style="FONT-FAMILY: 黑体; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: EN-US">关键字</SPAN><SPAN
lang=EN-US style="mso-ansi-language: EN-US">this</SPAN><SPAN
style="FONT-FAMILY: 黑体; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: EN-US">用法</SPAN><SPAN
lang=EN-US style="mso-ansi-language: EN-US">2</SPAN></FONT></P>
<P class=a2
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm; mso-char-indent-count: 0"><FONT
size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">案例文件</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN
lang=EN-GB>ThisSample.java</SPAN></FONT></P>
<P class=a2
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm; mso-char-indent-count: 0"><FONT
size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">目</SPAN><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes">
</SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">标</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-hansi-font-family: 'Times New Roman'">：体会</SPAN><SPAN
lang=EN-US style="mso-ansi-language: EN-US">Java</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">关键字</SPAN><SPAN
lang=EN-GB>this</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的作用、</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-hansi-font-family: 'Times New Roman'">掌握其</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用法</SPAN></FONT></P>
<P class=a2
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm; mso-char-indent-count: 0"><FONT
size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">代</SPAN><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes">
</SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">码：</SPAN></FONT></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-GB>/ *<SPAN style="mso-tab-count: 1">
</SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">范例名称：关键字</SPAN><SPAN
lang=EN-GB>this</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用法</SPAN></FONT></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes"> </SPAN>* <SPAN
style="mso-tab-count: 1"> </SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">源文件名称：</SPAN><SPAN
lang=EN-GB>ThisSample.java</SPAN></FONT></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes"> </SPAN>*<SPAN
style="mso-tab-count: 1"> </SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">描</SPAN><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes">
</SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">述：在应用程序中使用关键字</SPAN><SPAN
lang=EN-GB>this</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</SPAN></FONT></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes"> </SPAN>*<SPAN
style="mso-tab-count: 1"> </SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">要</SPAN><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes">
</SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">点：</SPAN></FONT></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes"> </SPAN>* <SPAN
style="mso-tab-count: 2">
</SPAN>1. this</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是一个引用类型变量</SPAN></FONT></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes"> </SPAN>*<SPAN
style="mso-tab-count: 2">
</SPAN>2. this</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">引用（指向）的是其所在方法的当前对象</SPAN></FONT></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-spacerun: yes"> </SPAN>*/</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><SPAN
style="mso-spacerun: yes"><FONT
size=3></FONT></SPAN></SPAN> </P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3>public class<SPAN style="mso-spacerun: yes">
</SPAN>ThisSample{</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>private<SPAN style="mso-spacerun: yes"> </SPAN>int<SPAN
style="mso-spacerun: yes"> </SPAN>year;</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>private<SPAN style="mso-spacerun: yes"> </SPAN>int<SPAN
style="mso-spacerun: yes"> </SPAN>month;</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>private<SPAN style="mso-spacerun: yes"> </SPAN>int<SPAN
style="mso-spacerun: yes"> </SPAN>day;</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>public ThisSample(int year,int month,int day)
{</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>this.year = year;<SPAN
style="mso-spacerun: yes">
</SPAN></FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>this.month = month;<SPAN
style="mso-spacerun: yes">
</SPAN></FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>this.day = day;</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>}</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>public<SPAN style="mso-spacerun: yes"> </SPAN>void<SPAN
style="mso-spacerun: yes"> </SPAN>setYear(int year) {
</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>this.year = year; </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>}</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>public<SPAN style="mso-spacerun: yes"> </SPAN>void<SPAN
style="mso-spacerun: yes"> </SPAN>setMonth(int m) {
</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>month = m; </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>}</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>public<SPAN style="mso-spacerun: yes"> </SPAN>void<SPAN
style="mso-spacerun: yes"> </SPAN>setDay(int d) {
</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>day = d; </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>}</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>public<SPAN style="mso-spacerun: yes"> </SPAN>void<SPAN
style="mso-spacerun: yes"> </SPAN>setting(){</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN style="mso-spacerun: yes"> </SPAN><SPAN
style="mso-tab-count: 2">
</SPAN>this.setYear(2001);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN style="mso-spacerun: yes"> </SPAN><SPAN
style="mso-tab-count: 2">
</SPAN>this.setMonth(9);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes"> </SPAN><SPAN
style="mso-tab-count: 2">
</SPAN>setDay(11);<SPAN style="mso-spacerun: yes">
</SPAN><SPAN
style="mso-tab-count: 2">
</SPAN>//</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">同</SPAN><SPAN
lang=EN-GB>this.setDay(11);</SPAN></FONT></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN style="mso-spacerun: yes"> </SPAN><SPAN
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