📄 java新手上路大全(初学必看).mht
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=B4=C7=F8=B1=F0<BR>throw=CA=C7=D4=DA=B3=CC=D0=F2=D6=D0=C5=D7=B3=F6=D2=EC=B3=
=A3=A3=AC=B6=F8throws=CA=C7=D4=DA=B7=BD=B7=A8=B5=C4=C9=F9=C3=F7=D6=D0=C9=F9=
=C3=F7=C5=D7=B3=F6=D2=EC=B3=A3<BR>4.upcasting=CA=C7=CA=B2=C3=B4=D2=E2=CB=BC=
<BR>upcasting=BE=CD=CA=C7=C9=CF=CB=DD.=D2=B2=BE=CD=CA=C7=CB=B5=B0=D1=D2=BB=
=B8=F6=D7=D3=C0=E0=B5=B1=D7=F7=CB=FC=B5=C4=B8=B8=C0=E0=BF=B4=B4=FD,=B1=C8=
=C8=E7:=B6=D4=B7=BD=B7=A8void do(Object obj){...},=C4=E3=BF=C9=D2=
=D4=B0=D1=C8=CE=BA=CE=B6=D4=CF=F3=D7=F7=CE=AA=B2=CE=CA=FD=C0=B4=B5=F7=D3=C3=
.</P>
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<P>=B1=E0=D2=EB=D4=CB=D0=D0<BR>1.=D4=F5=C3=B4=B0=D1=B6=E0=B8=F6.java=D4=B4=
=CE=C4=BC=FE=B1=E0=D2=EB=B3=C9=D2=BB=B8=F6.class?<BR>java -d .&=
nbsp;a.java b.java<BR>2. depreciated API =CA=C7=CA=B2=
=C3=B4=D2=E2=CB=BC?<BR>java=B7=A2=D5=B9=CC=AB=BF=EC,=CB=F9=D2=D4=C4=E3=D3=
=A6=B8=C3=BE=A1=BF=C9=C4=DC=D3=C3=D7=EE=D0=C2=B5=C4api,=B5=AB=CA=C7=C0=CF=
=B5=C4api=BB=B9=CA=C7=BC=E6=C8=DD=B5=C4,=CB=F9=D2=D4=BB=D8waning =C4=
=E3deprecated api<BR>3.=D4=F5=C3=B4=D1=F9=B1=E0=D2=EB=D2=BB=B8=F6=C4=
=BF=C2=BC=CF=C2=B5=C4=CB=F9=D3=D0java=CE=C4=BC=FE=A3=BF<BR>ant=BB=F2=D5=DF=
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***.jar<BR>6.=C8=E7=BA=CE=C8=A5=B5=F4JAVA=B5=C4=C4=DA=B4=E6=CF=DE=D6=
=C6<BR>=BC=D3 -Xmx=B2=CE=CA=FD=C0=B4=C9=E8=D6=C3maximum Java&nb=
sp;heap size,=C8=E7: java -Xms10M MyClass<BR>7.=CA=B2=
=C3=B4=CA=C7Java=BB=EC=CF=FD=B1=E0=D2=EB=C6=F7?<BR><A=20
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ble=D3=EBbyte=C8=E7=BA=CE=CF=E0=BB=A5=D7=AA=BB=BB?<BR><A=20
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target=3D_blank>http://www.matrix.org.cn/forum_view.asp?forum_id=3D19&=
;view_id=3D919</A><BR>2.int=D3=EBbyte array=D6=AE=BC=E4=B5=C4=D7=AA=BB=
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target=3D_blank>http://www.matrix.org.cn/forum_view.asp?forum_id=3D19&=
;view_id=3D920</A><BR>3.string=BA=CDint=D6=AE=BC=E4=B5=C4=D7=AA=BB=BB?<BR=
>a1=3DInteger.parseInt(s1);<BR>s1=3DInteger.toString(a1);<BR>4.java=C8=E7=
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ndom()=BB=F1=B5=C3=D2=BB=B8=F6=CB=E6=BB=FA=B8=A1=B5=E3=CA=FD=A3=AC=C8=BB=BA=
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=A1=D5=FB=A1=A3<BR>5.=D4=F5=C3=B4=B0=D1String=C0=E0=D0=CD=D7=AA=BB=BB=B3=C9=
16=BD=F8=D6=C6=B5=C4=D5=FB=CA=FD?<BR> public static void&n=
bsp;main(String args[]){<BR> &nbs=
p; String x =3D "0x300C8";<BR>  =
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ut.println(y);<BR> }<BR>6.int=BA=CDjava.lang.Integ=
er=D3=D0=BA=CD=C7=F8=B1=F0?<BR>int=CA=C7=CA=FD=BE=DD=C0=E0=D0=CD=A3=ACInt=
eger=CA=C7=C0=E0Integer=B5=C4=B9=A6=C4=DC=B8=FC=C7=BF=A3=AC=BF=C9=D2=D4=BD=
=AB=D5=FB=CA=FD=D7=AA=BB=BB=CE=AA=B8=A1=B5=E3=CA=FD=D4=CB=CB=E3=A3=AC=D4=DA=
java=D5=E2=D6=D6=C7=BF=C0=E0=D0=CD=D3=EF=D1=D4=D6=D0=CA=C7=BA=DC=D3=D0=D3=
=C3=B5=C4=A1=A3=BF=C9=D2=D4=C0=FB=D3=C3Integer=B5=C4=B9=B9=D4=EC=BA=AF=CA=
=FDInteger(int)=C0=B4=B6=D4=D2=BB=B8=F6=D5=FB=CA=FD=BD=A8=C1=A2=B6=D4=CF=F3=
=A1=A3=C0=E0=CB=C6=B5=C4=C0=E0=BB=B9=D3=D0Float,Short,Long=B5=C8=B5=C8</P=
>
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=C1=BF?<BR>Vector vector1=3Dnew Vector();<BR>Vector vector=
2=3Dnew Vector();<BR>...<BR>..<BR>HashTable numbers=3Dnew =
HashTable();<BR>numbers.put("vector1",vector1);<BR>numbers.put("vector2",=
vector2);<BR>2. JAVA=D6=D0=D4=F5=C3=B4=B5=C3=B5=BD=CF=D6=D4=DA=B5=C4=
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y=3Dnew Date(System.currentTimeMillis());<BR>3.=C8=E7=BA=CE=BD=ABjav=
a.util.Date=D7=AA=BB=AF=CE=AAjava.sql.Date?<BR>=D7=AA=BB=AF=A3=BA<BR>&nbs=
p;<BR>java.sql.Date sd;<BR>java.util.Date ud;<BR>//initialize&n=
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=B4=BF=C9=D2=D4=D3=C3PreparedStatement.setDate(int ,java.sql.Date)=B7=
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=D2=BB=B8=F6=B3=CC=D0=F2?<BR>String strCommand;<BR>String cmd&n=
bsp;=3D "cmd";<BR>if (! System.getProperty("os.name").equa=
ls("Windows NT")) cmd =3D "command";<BR>cmd =3D&=
nbsp;cmd + " /c " + strCommand;<BR>try =
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p;<BR>strCommand =CE=AA=C3=FC=C1=EE=B4=AE=A3=ACDOS =B5=D7=CF=C2=
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BR>2.=C8=E7=BA=CE=B5=C3=B5=BD=D3=A6=D3=C3=B3=CC=D0=F2=B5=C4=C2=B7=BE=B6<B=
R>Properties System.getProperties()=C0=EF=C3=E6=D3=D0<BR>3.=C8=E7=BA=
=CE=B5=C3=B5=BD=B5=B1=C7=B0=CF=B5=CD=B3=CA=B1=BC=E4?<BR>  =
;1.SimpleDateFormat formatter=3Dnew SimpleDateFormat("yyyy-MM-d=
d");<BR> String time=3Dformatter.=
format(new Date());<BR> 2.Calendar cal&n=
bsp;=3D Calendar.getInstance();<BR> &nb=
sp; int year =3D cal.get(Calendar.YEAR);<BR>&nb=
sp; month=3D..=C0=E0=CD=C6=
</P>
=
<P><BR>=CA=E4=C8=EB=CA=E4=B3=F6<BR>1.=CA=C7=B7=F1=BF=C9=D2=D4=D3=C3=B4=BF=
JAVA =B1=E0=D0=B4=B3=CC=D0=F2=C0=B4=B7=C3=CE=CA=B4=AE=BF=DA?<BR>Sun=CC=
=E1=B9=A9=C1=CB=D2=BB=B8=F6=BD=D0javax.comm=B5=C4package,=D7=A8=C3=C5=D3=C3=
=C0=B4=B6=D4serial port=BD=F8=D0=D0=B2=D9=D7=F7.<BR>2.writeutf=BA=CD=
write=B5=C4=C7=F8=B1=F0<BR><A=20
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;view_id=3D921</A><BR>3.=C8=E7=BA=CE=C0=FB=D3=C3FileWriter=D4=DA=CE=C4=B1=
=BE=D6=D0=BB=BB=D0=D0=A3=BF<BR>\r\n</P>
=
<P>=CD=F8=C2=E7=CF=E0=B9=D8<BR>1.=C8=E7=BA=CE=C8=C3=CE=D2=B5=C4=B3=CC=D0=F2=
=CD=A8=B9=FDproxy=B7=C3=CE=CA=CD=E2=B2=BF=CD=F8=C2=E7?<BR>System.setPrope=
rty("java.proxyHost","your proxy here"); </P>
=
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dll=A3=BF<BR> jni<BR>2.=C8=E7=BA=CE=D3=C3java=B1=E0=D0=B4=C9=A8=
=C3=E8=D2=C7=B3=CC=D0=F2=A3=BF<BR><A=20
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<TD>=A1=A4<A title=3DJava =
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target=3D_blank =C8=EB=C3=C5=A3=A8=C4=BF=C2=BC=A3=A9 =
Applet>Java Applet =C8=EB=C3=C5=A3=A8=C4=BF...</A><BR>=A1=A4<A=20
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title=3DJava=D0=C2=CA=D6=C9=CF=C2=B7=B4=F3=C8=AB(=B3=F5=D1=A7=B1=D8=BF=B4=
)=20
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target=3D_blank>Java=D0=C2=CA=D6=C9=CF=C2=B7=B4=F3=C8=AB(=B3=F5=D1=A7=B1=D8=
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title=3DEclipse=20
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=BC=F2=BD=E9=BA=CD=B2=E5=BC=FE=BF=AA=B7=A2=CA=BE=C0=FD =
3.0>Eclipse 3.0 =BC=F2=BD=E9=BA=CD=B2=E5...</A><BR>=A1=A4<A =
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1=B9=A4=BE=DF...</A><BR>=A1=A4<A =
title=3D=C8=C3Java=CB=B5=BB=B0=A3=AD=D3=C3Java=CA=B5=CF=D6=D3=EF=D2=F4=D2=
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