📄 csdn_文档中心_一步一步学java(第四课 方法、值传递、this关键字).htm
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lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public void
setMonth(int m){</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><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 10.5pt"><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 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public void
setYear(int y){ </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>year = y; </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><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 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public int
getDay(){ </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>return day; </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><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 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public int
getMonth(){ </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>return month; </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><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 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public int
getYear(){ </FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>return year;</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><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 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public void
display(){</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>System.out.println(day + " - " + month + " - " +
year);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><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 10.5pt"><SPAN
lang=EN-GB><FONT size=3>}</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><o:p><FONT size=3> </FONT></o:p></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3>public class Example{</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public static
void main(String args[]){</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>Example ex = new Example();</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>int date = 9;</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>BirthDate d1= new BirthDate(7,7,1970);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>BirthDate d2= new BirthDate(1,1,2000);<SPAN
style="mso-spacerun: yes"> </SPAN><SPAN
style="mso-tab-count: 1">
</SPAN></FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>ex.change1(date);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>ex.change2(d1);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>ex.change3(d2);<SPAN
style="mso-tab-count: 1">
</SPAN></FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>System.out.println("date=" + date);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>d1.display();</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>d2.display();<SPAN
style="mso-tab-count: 3">
</SPAN></FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><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 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public void
change1(int i){</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>i = 1234;</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>}<SPAN
style="mso-tab-count: 1">
</SPAN></FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public void
change2(BirthDate b){</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>b = new BirthDate(22,2,2004);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><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 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>public void
change3(BirthDate b){</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 2">
</SPAN>b.setDay(22);</FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3><SPAN
style="mso-tab-count: 1"> </SPAN>}<SPAN
style="mso-tab-count: 1">
</SPAN></FONT></SPAN></P>
<P class=a2 style="MARGIN: 0cm 0cm 0pt 10.5pt"><SPAN
lang=EN-GB><FONT size=3>}</FONT></SPAN></P>
<P class=a2
style="MARGIN: 0cm 0cm 0pt 10.5pt; TEXT-INDENT: 10.5pt; mso-char-indent-count: 0"><SPAN
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