📄 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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style="mso-tab-count: 1"> </SPAN>}<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=a
style="MARGIN: 6pt 0cm; TEXT-INDENT: 0cm; mso-char-indent-count: 0"><FONT
size=3><SPAN lang=EN-US style="mso-ansi-language: EN-US"><SPAN
style="mso-spacerun: yes"> </SPAN>Java</SPAN><SPAN
style="FONT-FAMILY: 黑体; mso-ascii-font-family: 'Times New Roman'; mso-ansi-language: EN-US">变量作用域举例</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
lang=EN-GB>Test.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'">：体会并掌握</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-ansi-language: EN-US; mso-hansi-font-family: 'Times New Roman'">中变量作用域的概念</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; 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=a1 style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-GB>/ *<SPAN style="mso-tab-count: 1">
</SPAN></SPAN><SPAN
style="FONT-FAMILY: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">范例名称：</SPAN><SPAN
lang=EN-GB>Java</SPAN><SPAN
style="FONT-FAMILY: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">变量作用域举例</SPAN></FONT></P>
<P class=a1 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: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">源文件名称：</SPAN><SPAN
lang=EN-GB>Test.java</SPAN></FONT></P>
<P class=a1 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: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">描</SPAN><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes">
</SPAN></SPAN><SPAN
style="FONT-FAMILY: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">述：被不同方法中使用同名的局部变量，并操纵同一个对象。</SPAN></FONT></P>
<P class=a1 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: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">要</SPAN><SPAN
lang=EN-GB><SPAN style="mso-spacerun: yes">
</SPAN></SPAN><SPAN
style="FONT-FAMILY: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">点：</SPAN></FONT></P>
<P class=a1 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. </SPAN><SPAN
style="FONT-FAMILY: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">局部变量与实例变量的关系</SPAN></FONT></P>
<P class=a1 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. </SPAN><SPAN
style="FONT-FAMILY: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">变量的作用域</SPAN></FONT></P>
<P class=a1 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>3. </SPAN><SPAN
style="FONT-FAMILY: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">变量的生存期</SPAN></FONT></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-spacerun: yes"> </SPAN>*/</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3>public class Test {</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>private int i=1;</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>public void method1() {</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>int i=4, j=5;</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>this.i = i + j;</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>method2(7);</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>}</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>public void method2(int i) {</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>int j=8;</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>this.i = i + j;</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>System.out.println(this.i);</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>}</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><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=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>Test <SPAN style="mso-spacerun: yes"> </SPAN>t = new
Test();</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 2">
</SPAN>t.method1();</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3><SPAN
style="mso-tab-count: 1">
</SPAN>}</FONT></SPAN></P>
<P class=a1 style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-GB><FONT
size=3>}</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
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