jdk/src/solaris/doc/sun/man/man1/ja/javap.1
author tbell
Mon, 04 May 2009 18:28:26 -0700
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6837214: Update JDK7 man pages Reviewed-by: darcy, bpatel, tbell Contributed-by: jacob.royal@sun.com
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." Copyright 2002-2006 Sun Microsystems, Inc.  All Rights Reserved.
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." DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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."
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." This code is free software; you can redistribute it and/or modify it
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." under the terms of the GNU General Public License version 2 only, as
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." published by the Free Software Foundation.
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."
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." This code is distributed in the hope that it will be useful, but WITHOUT
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." ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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." FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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." version 2 for more details (a copy is included in the LICENSE file that
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." accompanied this code).
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."
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." You should have received a copy of the GNU General Public License version
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." 2 along with this work; if not, write to the Free Software Foundation,
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." Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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."
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." Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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." CA 95054 USA or visit www.sun.com if you need additional information or
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." have any questions.
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."
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.TH javap 1 "04 May 2009"
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." Generated from HTML by html2man (author: Eric Armstrong)
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.LP
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.SH "名前"
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javap \- Java クラスファイル逆アセンブラ
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.RS 3
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.LP
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.LP
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クラスファイルを逆アセンブルします。
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.LP
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.RE
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.SH "形式"
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.LP
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.LP
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.nf
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\f3
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.fl
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javap [ \fP\f3options\fP\f3 ] class. . .
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.fl
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\fP
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.fi
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.SH "説明"
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.LP
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.LP
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.LP
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\f3javap\fP コマンドは、クラスファイルを逆アセンブルします。その出力は指定するオプションにより異なります。オプションを指定しない場合、\f3javap\fP は、そのパッケージ、渡されたクラスの protected および public のフィールドとメソッドを出力します。 \f3javap\fP はその出力を標準出力に表示します。たとえば、次のクラス宣言をコンパイルするとします。
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.LP
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.RS 3
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.LP
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.nf
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\f3
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.fl
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import java.awt.*;
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import java.applet.*;
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public class DocFooter extends Applet {
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        String date;
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        String email;
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.fl
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        public void init() {
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                resize(500,100);
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                date = getParameter("LAST_UPDATED");
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                email = getParameter("EMAIL");
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        }
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.fl
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        public void paint(Graphics g) {
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                g.drawString(date + " by ",100, 15);
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                g.drawString(email,290,15);
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        }
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}
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.fl
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\fP
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.fi
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.RE
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.LP
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\f3javap DocFooter\fP がもたらす出力は次のようになります。
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.LP
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.RS 3
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.LP
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.nf
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\f3
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.fl
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Compiled from DocFooter.java
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public class DocFooter extends java.applet.Applet {
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    java.lang.String date;
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    java.lang.String email;
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    public DocFooter();
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    public void init();
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    public void paint(java.awt.Graphics);
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}
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.fl
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\fP
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.fi
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.RE
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\f3javap \-c DocFooter\fP がもたらす出力は次のようになります。
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.RS 3
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.nf
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\f3
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Compiled from DocFooter.java
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public class DocFooter extends java.applet.Applet {
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    java.lang.String date;
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    java.lang.String email;
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    public DocFooter();
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    public void init();
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    public void paint(java.awt.Graphics);
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}
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Method DocFooter()
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   0 aload_0
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   1 invokespecial #1 <Method java.applet.Applet()>
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   4 return
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Method void init()
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   0 aload_0
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   1 sipush 500
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   4 bipush 100
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   6 invokevirtual #2 <Method void resize(int, int)>
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   9 aload_0
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  10 aload_0
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  11 ldc #3 <String "LAST_UPDATED">
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  13 invokevirtual #4 <Method java.lang.String getParameter(java.lang.String)>
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  16 putfield #5 <Field java.lang.String date>
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  19 aload_0
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  20 aload_0
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  21 ldc #6 <String "EMAIL">
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.fl
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  23 invokevirtual #4 <Method java.lang.String getParameter(java.lang.String)>
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.fl
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  26 putfield #7 <Field java.lang.String email>
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.fl
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  29 return
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.fl
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.fl
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Method void paint(java.awt.Graphics)
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.fl
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   0 aload_1
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.fl
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   1 new #8 <Class java.lang.StringBuffer>
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.fl
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   4 dup
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.fl
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   5 invokespecial #9 <Method java.lang.StringBuffer()>
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.fl
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   8 aload_0
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.fl
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   9 getfield #5 <Field java.lang.String date>
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.fl
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  12 invokevirtual #10 <Method java.lang.StringBuffer append(java.lang.String)>
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.fl
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  15 ldc #11 <String " by ">
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.fl
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  17 invokevirtual #10 <Method java.lang.StringBuffer append(java.lang.String)>
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.fl
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  20 invokevirtual #12 <Method java.lang.String toString()>
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.fl
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  23 bipush 100
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.fl
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  25 bipush 15
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.fl
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  27 invokevirtual #13 <Method void drawString(java.lang.String, int, int)>
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.fl
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  30 aload_1
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.fl
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  31 aload_0
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.fl
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  32 getfield #7 <Field java.lang.String email>
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.fl
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  35 sipush 290
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.fl
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  38 bipush 15
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.fl
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  40 invokevirtual #13 <Method void drawString(java.lang.String, int, int)>
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.fl
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  43 return
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.fl
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\fP
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.fi
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.RE
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.LP
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.SH "オプション"
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.LP
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.LP
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.RS 3
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.TP 3
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\-help 
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\f3javap\fP のヘルプメッセージを出力します。 
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.TP 3
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\-l 
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行番号と局所変数テーブルを表示します。 
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.TP 3
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\-b 
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JDK 1.1 の \f3javap\fP との下位互換性を保証します。 
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.TP 3
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\-public 
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public クラスおよびメンバーだけを表示します。 
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.TP 3
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\-protected 
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protected および public のクラスとメンバーだけを表示します。 
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.TP 3
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\-package 
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package、protected、および public のクラスとメンバーだけを表示します。これはデフォルトの設定です。 
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.TP 3
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\-private 
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すべてのクラスとメンバーを表示します。 
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.TP 3
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\-Jflag 
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ランタイムシステムに直接 \f2flag\fP を渡します。使用例を次に示します。 
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.RS 3
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.LP
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.nf
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\f3
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.fl
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javap \-J\-version
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.fl
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javap \-J\-Djava.security.manager \-J\-Djava.security.policy=MyPolicy MyClassName
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.fl
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\fP
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.fi
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.RE
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.TP 3
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\-s 
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内部の型シグニチャーを出力します。 
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.TP 3
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\-c 
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クラスの各メソッドのために逆アセンブルされるコード、すなわち Java バイトコードから成る命令を表示します。これらは
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.na
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\f2「Java Virtual Machine Specification」\fP @
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.fi
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http://java.sun.com/docs/books/vmspec/にドキュメント化されています。 
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.TP 3
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\-verbose 
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メソッドのスタックサイズ、および \f2locals\fP と \f2args\fP の数を出力します。 
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.TP 3
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\-classpath path 
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\f3javap\fP がクラスを探すために使用するパスを指定します。デフォルトまたは CLASSPATH 環境変数設定を上書きします。ディレクトリはコロンで分割します。したがって、\f2path\fP の一般形式は次のようになります。 
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.nf
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\f3
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.fl
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   .:<your_path>
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.fl
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\fP
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.fi
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例を示します。 
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.nf
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\f3
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.fl
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.:/home/avh/classes:/usr/local/java/classes
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.fl
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\fP
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.fi
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.TP 3
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\-bootclasspath path 
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ブートストラップクラスをロードするパスを指定します。ブートストラップクラスは、デフォルトでは \f2jre/lib/rt.jar\fP および他のいくつかの JAR ファイル にある、コア Java 2 プラットフォームを実装するクラスです。 
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.TP 3
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\-extdirs dirs 
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インストールされた拡張機能を検索する場所をオーバーライドします。The default location for extensions is the value of \f2java.ext.dirs\fP. 
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.RE
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.LP
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.SH "環境変数"
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.LP
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.LP
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.RS 3
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.TP 3
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CLASSPATH 
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ユーザー定義クラスへのパスをシステムに指定します。ディレクトリはコロンで分割します。 次に例を示します。 
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.RS 3
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.LP
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.nf
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\f3
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.fl
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.:/home/avh/classes:/usr/local/java/classes
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.fl
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\fP
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.fi
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.RE
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.RE
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.LP
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.SH "関連項目"
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.LP
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.LP
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.LP
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javac(1)、 java(1)、jdb(1)、javah(1)、javadoc(1)
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.LP
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.LP
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