Reflection in Java. 介绍Java中的反射机制

black">Method</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=81</SPAN><SPAN style=3D"COLOR: =
black">Field</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=81</SPAN><SPAN style=3D"COLOR: =
black">Constructor</SPAN><SPAN=20
style=3D"COLOR: black">=E7=AD=89=E7=AD=89</SPAN><SPAN style=3D"COLOR: =
black">classes</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=82</SPAN></FONT></DIV>
<DIV align=3Dleft>&nbsp;</DIV>
<DIV align=3Dleft><FONT size=3D2><STRONG><SPAN=20
style=3D"FONT-SIZE: 14pt; COLOR: =
black">=E2=80=9C</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 14pt; COLOR: =
black">Class</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 14pt; COLOR: =
black">=E2=80=9D</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 14pt; COLOR: =
black">class</SPAN></STRONG></FONT></DIV>
<DIV align=3Dleft><FONT size=3D2><SPAN style=3D"COLOR: =
black">=E4=BC=97=E6=89=80=E5=91=A8=E7=9F=A5</SPAN><SPAN=20
style=3D"COLOR: black">Java</SPAN><SPAN style=3D"COLOR: =
black">=E6=9C=89=E4=B8=AA</SPAN><SPAN=20
style=3D"COLOR: black">Object class</SPAN><SPAN=20
style=3D"COLOR: black">=EF=BC=8C=E6=98=AF=E6=89=80=E6=9C=89</SPAN><SPAN =
style=3D"COLOR: black">Java=20
classes</SPAN><SPAN style=3D"COLOR: =
black">=E7=9A=84=E7=BB=A7=E6=89=BF=E6=A0=B9=E6=BA=90=EF=BC=8C=E5=85=B6=E5=
=86=85=E5=A3=B0=E6=98=8E=E4=BA=86=E6=95=B0=E4=B8=AA=E5=BA=94=E8=AF=A5=E5=9C=
=A8=E6=89=80=E6=9C=89</SPAN><SPAN=20
style=3D"COLOR: black">Java class</SPAN><SPAN=20
style=3D"COLOR: =
black">=E4=B8=AD=E8=A2=AB=E6=94=B9=E5=86=99=E7=9A=84</SPAN><SPAN =
style=3D"COLOR: black">methods</SPAN><SPAN=20
style=3D"COLOR: black">=EF=BC=9A</SPAN><SPAN style=3D"COLOR: =
black">hashCode()</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=81</SPAN><SPAN style=3D"COLOR: =
black">equals()</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=81</SPAN><SPAN style=3D"COLOR: =
black">clone()</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=81</SPAN><SPAN style=3D"COLOR: =
black">toString()</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=81</SPAN><SPAN style=3D"COLOR: =
black">getClass()</SPAN><SPAN=20
style=3D"COLOR: black">=E7=AD=89=E3=80=82=E5=85=B6=E4=B8=AD</SPAN><SPAN=20
style=3D"COLOR: black">getClass()</SPAN><SPAN=20
style=3D"COLOR: black">=E8=BF=94=E5=9B=9E=E4=B8=80=E4=B8=AA</SPAN><SPAN =
style=3D"COLOR: black">Class=20
object</SPAN><SPAN style=3D"COLOR: black">=E3=80=82</SPAN></FONT></DIV>
<DIV align=3Dleft>&nbsp;</DIV>
<DIV align=3Dleft><FONT size=3D2><SPAN style=3D"COLOR: black">Class =
class</SPAN><SPAN=20
style=3D"COLOR: =
black">=E5=8D=81=E5=88=86=E7=89=B9=E6=AE=8A=E3=80=82=E5=AE=83=E5=92=8C=E4=
=B8=80=E8=88=AC</SPAN><SPAN=20
style=3D"COLOR: black">classes</SPAN><SPAN style=3D"COLOR: =
black">=E4=B8=80=E6=A0=B7=E7=BB=A7=E6=89=BF=E8=87=AA</SPAN><SPAN=20
style=3D"COLOR: black">Object</SPAN><SPAN=20
style=3D"COLOR: =
black">=EF=BC=8C=E5=85=B6=E5=AE=9E=E4=BD=93=E7=94=A8=E4=BB=A5=E8=A1=A8=E8=
=BE=BE</SPAN><SPAN style=3D"COLOR: black">Java</SPAN><SPAN=20
style=3D"COLOR: =
black">=E7=A8=8B=E5=BA=8F=E8=BF=90=E8=A1=8C=E6=97=B6=E7=9A=84</SPAN><SPAN=
 style=3D"COLOR: black">classes</SPAN><SPAN=20
style=3D"COLOR: black">=E5=92=8C</SPAN><SPAN style=3D"COLOR: =
black">interfaces</SPAN><SPAN=20
style=3D"COLOR: =
black">=EF=BC=8C=E4=B9=9F=E7=94=A8=E6=9D=A5=E8=A1=A8=E8=BE=BE</SPAN><SPAN=
 style=3D"COLOR: black">enum</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=81</SPAN><SPAN style=3D"COLOR: =
black">array</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=81</SPAN><SPAN style=3D"COLOR: =
black">primitive Java=20
types</SPAN><SPAN style=3D"COLOR: black">=EF=BC=88</SPAN><SPAN=20
style=3D"COLOR: black">boolean, byte, char, short, int, long, float,=20
double</SPAN><SPAN style=3D"COLOR: =
black">=EF=BC=89=E4=BB=A5=E5=8F=8A=E5=85=B3=E9=94=AE=E8=AF=8D</SPAN><SPAN=
=20
style=3D"COLOR: black">void</SPAN><SPAN style=3D"COLOR: =
black">=E3=80=82=E5=BD=93=E4=B8=80=E4=B8=AA</SPAN><SPAN=20
style=3D"COLOR: black">class</SPAN><SPAN=20
style=3D"COLOR: =
black">=E8=A2=AB=E5=8A=A0=E8=BD=BD=EF=BC=8C=E6=88=96=E5=BD=93=E5=8A=A0=E8=
=BD=BD=E5=99=A8=EF=BC=88</SPAN><SPAN style=3D"COLOR: black">class=20
loader</SPAN><SPAN style=3D"COLOR: black">=EF=BC=89=E7=9A=84</SPAN><SPAN =

style=3D"COLOR: black">defineClass()</SPAN><SPAN=20
style=3D"COLOR: black">=E8=A2=AB</SPAN><SPAN style=3D"COLOR: =
black">JVM</SPAN><SPAN=20
style=3D"COLOR: black">=E8=B0=83=E7=94=A8=EF=BC=8C</SPAN><SPAN =
style=3D"COLOR: black">JVM </SPAN><SPAN=20
style=3D"COLOR: =
black">=E4=BE=BF=E8=87=AA=E5=8A=A8=E4=BA=A7=E7=94=9F=E4=B8=80=E4=B8=AA</S=
PAN><SPAN style=3D"COLOR: black">Class=20
object</SPAN><SPAN style=3D"COLOR: =
black">=E3=80=82=E5=A6=82=E6=9E=9C=E6=82=A8=E6=83=B3=E5=80=9F=E7=94=B1</S=
PAN><SPAN=20
style=3D"COLOR: black">=E2=80=9C</SPAN><SPAN style=3D"COLOR: =
black">=E4=BF=AE=E6=94=B9</SPAN><SPAN=20
style=3D"COLOR: black">Java</SPAN><SPAN style=3D"COLOR: =
black">=E6=A0=87=E5=87=86=E5=BA=93=E6=BA=90=E7=A0=81</SPAN><SPAN=20
style=3D"COLOR: black">=E2=80=9D</SPAN><SPAN style=3D"COLOR: =
black">=E6=9D=A5=E8=A7=82=E5=AF=9F</SPAN><SPAN=20
style=3D"COLOR: black">Class object</SPAN><SPAN=20
style=3D"COLOR: =
black">=E7=9A=84=E5=AE=9E=E9=99=85=E7=94=9F=E6=88=90=E6=97=B6=E6=9C=BA=EF=
=BC=88=E4=BE=8B=E5=A6=82=E5=9C=A8</SPAN><SPAN=20
style=3D"COLOR: black">Class</SPAN><SPAN style=3D"COLOR: =
black">=E7=9A=84</SPAN><SPAN=20
style=3D"COLOR: black">constructor</SPAN><SPAN=20
style=3D"COLOR: =
black">=E5=86=85=E6=B7=BB=E5=8A=A0=E4=B8=80=E4=B8=AA</SPAN><SPAN=20
style=3D"COLOR: black">println()</SPAN><SPAN=20
style=3D"COLOR: =
black">=EF=BC=89=EF=BC=8C=E4=B8=8D=E8=83=BD=E5=A4=9F=EF=BC=81=E5=9B=A0=E4=
=B8=BA</SPAN><SPAN style=3D"COLOR: black">Class</SPAN><SPAN=20
style=3D"COLOR: black">=E5=B9=B6=E6=B2=A1=E6=9C=89</SPAN><SPAN =
style=3D"COLOR: black">public=20
constructor</SPAN><SPAN style=3D"COLOR: =
black">=EF=BC=88=E8=A7=81</SPAN><SPAN=20
style=3D"COLOR: blue">=E5=9B=BE</SPAN><SPAN style=3D"COLOR: =
blue">1</SPAN><SPAN=20
style=3D"COLOR: =
black">=EF=BC=89=E3=80=82=E6=9C=AC=E6=96=87=E6=9C=80=E5=90=8E=E6=88=91=E4=
=BC=9A=E6=8B=A8=E4=B8=80=E5=B0=8F=E5=9D=97=E7=AF=87=E5=B9=85=E9=A1=BA=E5=B8=
=A6=E8=B0=88=E8=B0=88</SPAN><SPAN=20
style=3D"COLOR: black">Java</SPAN><SPAN=20
style=3D"COLOR: =
black">=E6=A0=87=E5=87=86=E5=BA=93=E6=BA=90=E7=A0=81=E7=9A=84=E6=94=B9=E5=
=8A=A8=E5=8A=9E=E6=B3=95=E3=80=82</SPAN></FONT></DIV>
<DIV align=3Dleft>&nbsp;</DIV>
<DIV align=3Dleft><FONT size=3D2><SPAN style=3D"COLOR: =
black">Class</SPAN><SPAN=20
style=3D"COLOR: black">=E6=98=AF</SPAN><SPAN style=3D"COLOR: =
black">Reflection</SPAN><SPAN=20
style=3D"COLOR: =
black">=E6=95=85=E4=BA=8B=E8=B5=B7=E6=BA=90=E3=80=82=E9=92=88=E5=AF=B9=E4=
=BB=BB=E4=BD=95=E6=82=A8=E6=83=B3=E6=8E=A2=E5=8B=98=E7=9A=84</SPAN><SPAN =

style=3D"COLOR: black">class</SPAN><SPAN=20
style=3D"COLOR: =
black">=EF=BC=8C=E5=94=AF=E6=9C=89=E5=85=88=E4=B8=BA=E5=AE=83=E4=BA=A7=E7=
=94=9F=E4=B8=80=E4=B8=AA</SPAN><SPAN style=3D"COLOR: black">Class=20
object</SPAN><SPAN style=3D"COLOR: =
black">=EF=BC=8C=E6=8E=A5=E4=B8=8B=E6=9D=A5=E6=89=8D=E8=83=BD=E7=BB=8F=E7=
=94=B1=E5=90=8E=E8=80=85=E5=94=A4=E8=B5=B7=E4=B8=BA=E6=95=B0=E5=8D=81=E5=A4=
=9A=E4=B8=AA=E7=9A=84</SPAN><SPAN=20
style=3D"COLOR: black">Reflection APIs</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=82=E8=BF=99=E4=BA=9B</SPAN><SPAN =
style=3D"COLOR: black">APIs</SPAN><SPAN=20
style=3D"COLOR: =
black">=E5=B0=86=E5=9C=A8=E7=A8=8D=E5=90=8E=E7=9A=84=E6=8E=A2=E9=99=A9=E6=
=B4=BB=E5=8A=A8=E4=B8=AD=E4=B8=80=E4=B8=80=E4=BA=AE=E7=9B=B8=E3=80=82</SP=
AN></FONT></DIV>
<DIV align=3Dleft>&nbsp;</DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black"><FONT size=3D2>#001 public=20
final</FONT></SPAN></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><FONT size=3D2><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">#002 class </SPAN><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: =
black">Class</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: blue">&lt;T&gt; </SPAN></STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">implements=20
java.io.Serializable,</SPAN></FONT></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black"><FONT size=3D2>#003=20
java.lang.reflect.GenericDeclaration,</FONT></SPAN></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black"><FONT size=3D2>#004=20
java.lang.reflect.Type,</FONT></SPAN></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black"><FONT size=3D2>#005=20
java.lang.reflect.AnnotatedElement {</FONT></SPAN></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><FONT size=3D2><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">#006 &nbsp;&nbsp; =
</SPAN><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: red">private </SPAN></STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">Class() {}</SPAN></FONT></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><FONT size=3D2><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">#007 &nbsp;&nbsp; public String=20
</SPAN><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: blue">toString</SPAN></STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">() {</SPAN></FONT></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black"><FONT size=3D2>#008=20
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return ( isInterface() ? "interface =
"=20
:</FONT></SPAN></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black"><FONT size=3D2>#009=20
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (isPrimitive() ? "" : "class=20
"))</FONT></SPAN></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black"><FONT size=3D2>#010 &nbsp;&nbsp; =
+=20
getName();</FONT></SPAN></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black"><FONT size=3D2>#011 =
}</FONT></SPAN></DIV>
<DIV style=3D"BACKGROUND: #cccccc" align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black"><FONT =
size=3D2>...</FONT></SPAN></DIV>
<DIV align=3Dcenter><FONT size=3D2><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: =
black">=E5=9B=BE</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">1</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: =
black">=EF=BC=9A</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">Class =
</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: =
black">class</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: =
black">=E7=89=87=E6=AE=B5=E3=80=82=E6=B3=A8=E6=84=8F=E5=AE=83=E7=9A=84</S=
PAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">private empty=20
ctor</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: =
black">=EF=BC=8C=E6=84=8F=E6=8C=87=E4=B8=8D=E5=85=81=E8=AE=B8=E4=BB=BB=E4=
=BD=95=E4=BA=BA=E7=BB=8F=E7=94=B1=E7=BC=96=E7=A8=8B=E6=96=B9=E5=BC=8F=E4=BA=
=A7=E7=94=9F</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">Class =
</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: =
black">object</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: =
black">=E3=80=82=E6=98=AF=E7=9A=84=EF=BC=8C=E5=85=B6</SPAN></STRONG><STRO=
NG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">object =
</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: =
black">=E5=8F=AA=E8=83=BD=E7=94=B1</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 9pt; COLOR: black">JVM </SPAN></STRONG><STRONG><SPAN =

style=3D"FONT-SIZE: 9pt; COLOR: =
black">=E4=BA=A7=E7=94=9F=E3=80=82</SPAN></STRONG></FONT></DIV>
<DIV align=3Dleft><STRONG></STRONG>&nbsp;</DIV>
<DIV align=3Dleft><FONT size=3D2><STRONG><SPAN=20
style=3D"FONT-SIZE: 14pt; COLOR: =
black">=E2=80=9C</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 14pt; COLOR: =
black">Class</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 14pt; COLOR: =
black">=E2=80=9D</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 14pt; COLOR: black"> =
object</SPAN></STRONG><STRONG><SPAN=20
style=3D"FONT-SIZE: 14pt; COLOR: =
black">=E7=9A=84=E5=8F=96=E5=BE=97=E9=80=94=E5=BE=84</SPAN></STRONG></FON=
T></DIV>
<DIV align=3Dleft><FONT size=3D2><SPAN style=3D"COLOR: =
black">Java</SPAN><SPAN=20
style=3D"COLOR: =
black">=E5=85=81=E8=AE=B8=E6=88=91=E4=BB=AC=E4=BB=8E=E5=A4=9A=E7=A7=8D=E7=
=AE=A1=E9=81=93=E4=B8=BA=E4=B8=80=E4=B8=AA</SPAN><SPAN=20
style=3D"COLOR: black">class</SPAN><SPAN style=3D"COLOR: =
black">=E7=94=9F=E6=88=90=E5=AF=B9=E5=BA=94=E7=9A=84</SPAN><SPAN=20
style=3D"COLOR: black">Class </SPAN><SPAN style=3D"COLOR: =
black">object</SPAN><SPAN=20
style=3D"COLOR: black">=E3=80=82</SPAN><SPAN style=3D"COLOR: =
blue">=E5=9B=BE</SPAN><SPAN=20
style=3D"COLOR: blue">2</SPAN><SPAN=20
style=3D"COLOR: =
black">=E6=98=AF=E4=B8=80=E4=BB=BD=E6=95=B4=E7=90=86=E3=80=82</SPAN></FON=
T></DIV>
<P>
<TABLE=20
style=3D"BORDER-RIGHT: medium none; BORDER-TOP: medium none; =
BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: =
collapse"=20
cellSpacing=3D0 cellPadding=3D0 border=3D1>
  <TBODY>
  <TR>
    <TD=20
    style=3D"BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; =
BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: =
0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 140.4pt; PADDING-TOP: =
0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent" =

    vAlign=3Dtop width=3D187>
      <DIV align=3Dleft><FONT size=3D2><SPAN style=3D"COLOR: =
black">Class object=20
      </SPAN><SPAN style=3D"COLOR: =
black">=E8=AF=9E=E7=94=9F=E7=AE=A1=E9=81=93</SPAN></FONT></DIV></TD>
    <TD=20
    style=3D"BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; =
BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: =
0cm; BORDER-LEFT: #ece9d8; WIDTH: 285.7pt; PADDING-TOP: 0cm; =
BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent"=20
    vAlign=3Dtop width=3D381>
      <DIV align=3Dleft><FONT size=3D2><SPAN=20
      style=3D"COLOR: =
black">=E7=A4=BA=E4=BE=8B</SPAN></FONT></DIV></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; =
BORDER-TOP: #ece9d8; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; =
BORDER-LEFT: windowtext 1pt solid; WIDTH: 140.4pt; PADDING-TOP: 0cm; =
BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: