Java 反编译器返回哪些仅注释的方法？

我查看了安卓银行应用程序的源代码，我发现在大多数应用程序中，有一些方法什么都不做，而在它们内部，只有一些奇怪的注释代码

看看这个例子：

/* Error */
  public final void b()
  {
    // Byte code:
    //   0: aload_0
    //   1: getfield 68 example/com/PackagePMB:y    Lc/y;
    //   4: ifnonnull +15 -> 19
    //   7: aload_0
    //   8: new 640 c/y
    //   11: dup
    //   12: aload_0
    //   13: invokespecial 643  c/y:<init>  (Lc/w;)V
    //   16: putfield 68    example/com/PackagePMB:y    Lc/y;
    //   19: getstatic 645  c/g:m   B
    //   22: ifeq +18 -> 40
    //   25: aload_0
    //   26: getfield 174   example/com/PackagePMB:p    Ljava/util/Stack;
    //   29: invokevirtual 648  java/util/Stack:size    ()I
    //   32: ifle +8 -> 40
    //   35: aload_0
    //   36: invokevirtual 457  example/com/PackagePMB:j    ()V
    //   39: return
    //   40: aload_0
    //   41: getfield 174   example/com/PackagePMB:p    Ljava/util/Stack;
    //   44: invokevirtual 651  java/util/Stack:removeAllElements   ()V
    //   47: aload_0
    //   48: getfield 176   example/com/PackagePMB:u    Lc/ag;
    //   51: aload_0
    //   52: getfield 558   example/com/PackagePMB:f    Lc/c;
    //   55: invokevirtual 190  c/ag:a  (Landroid/view/View;)V
    //   58: aload_0
    //   59: getfield 176   example/com/PackagePMB:u    Lc/ag;
    //   62: invokevirtual 192  c/ag:b  ()V
    //   65: new 653    c/p
    //   68: dup
    //   69: getstatic 61   example/com/PackagePMB:a    Lexample/com/PackagePMB;
    //   72: invokespecial 654  c/p:<init>  (Landroid/content/Context;)V
    //   75: astore_1
    //   76: aload_1
    //   77: invokevirtual 655  c/p:a   ()V
    //   80: aload_1
    //   81: invokevirtual 656  c/p:b   ()V
    //   84: aload_1
    //   85: invokevirtual 660  c/p:getReadableDatabase ()Landroid/database/sqlite/SQLiteDatabase;
    //   88: astore 10
    //   90: aload 10
    //   92: ldc_w 662
    //   95: iconst_0
    //   96: anewarray 128  java/lang/String
    //   99: invokevirtual 668  android/database/sqlite/SQLiteDatabase:rawQuery (Ljava/lang/String;[Ljava/lang/String;)Landroid/database/Cursor;
    //   102: astore 11
    //   104: aload 11
    //   106: invokeinterface 673 1 0
    //   111: ifle +55 -> 166
    //   114: aload_0
    //   115: new 282   java/lang/StringBuilder
    //   118: dup
    //   119: ldc_w 675
    //   122: invokespecial 285 java/lang/StringBuilder:<init>  (Ljava/lang/String;)V
    //   125: aload 11
    //   127: invokeinterface 673 1 0
    //   132: invokevirtual 289 java/lang/StringBuilder:append  (I)Ljava/lang/StringBuilder;
    //   135: ldc_w 677
    //   138: invokevirtual 294 java/lang/StringBuilder:append  (Ljava/lang/String;)Ljava/lang/StringBuilder;
    //   141: invokevirtual 297 java/lang/StringBuilder:toString    ()Ljava/lang/String;
    //   144: iconst_1
    //   145: invokestatic 683  android/widget/Toast:makeText   (Landroid/content/Context;Ljava/lang/CharSequence;I)Landroid/widget/Toast;
    //   148: invokevirtual 686 android/widget/Toast:show   ()V
    //   151: iconst_0
    //   152: istore 12
    //   154: iload 12
    //   156: aload 11
    //   158: invokeinterface 673 1 0
    //   163: if_icmplt +75 -> 238
    //   166: aload 10
    //   168: invokevirtual 689 android/database/sqlite/SQLiteDatabase:close    ()V
    //   171: aload_1
    //   172: invokevirtual 690 c/p:close   ()V
    //   175: new 653   c/p
    //   178: dup
    //   179: getstatic 61  example/com/PackagePMB:a    Lexample/com/PackagePMB;
    //   182: invokespecial 654 c/p:<init>  (Landroid/content/Context;)V
    //   185: astore 5
    //   187: aload 5
    //   189: invokevirtual 656 c/p:b   ()V
    //   192: aload 5
    //   194: invokevirtual 693 c/p:getWritableDatabase ()Landroid/database/sqlite/SQLiteDatabase;
    //   197: astore 6
    //   199: aload 6
    //   201: ldc_w 695
    //   204: ldc_w 697
    //   207: iconst_0
    //   208: anewarray 128 java/lang/String
    //   211: invokevirtual 701 android/database/sqlite/SQLiteDatabase:delete   (Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;)I
    //   214: pop
    //   215: aload 6
    //   217: invokevirtual 689 android/database/sqlite/SQLiteDatabase:close    ()V
    //   220: aload 5
    //   222: invokevirtual 690 c/p:close   ()V
    //   225: return
    //   226: astore_2
    //   227: new 703   java/lang/Error
    //   230: dup
    //   231: ldc_w 705
    //   234: invokespecial 706 java/lang/Error:<init>  (Ljava/lang/String;)V
    //   237: athrow
    //   238: aload 11
    //   240: iload 12
    //   242: invokeinterface 709 2 0
    //   247: pop
    //   248: aload_0
    //   249: aload 11
    //   251: aload 11
    //   253: ldc_w 711
    //   256: invokeinterface 714 2 0
    //   261: invokeinterface 717 2 0
    //   266: aload 11
    //   268: aload 11
    //   270: ldc_w 719
    //   273: invokeinterface 714 2 0
    //   278: invokeinterface 717 2 0
    //   283: iconst_0
    //   284: invokestatic 616  java/lang/Boolean:valueOf   (Z)Ljava/lang/Boolean;
    //   287: invokespecial 618 example/com/PackagePMB:a    (Ljava/lang/String;Ljava/lang/String;Ljava/lang/Boolean;)V
    //   290: iinc 12 1
    //   293: goto -139 -> 154
    //   296: astore 4
    //   298: aload_1
    //   299: invokevirtual 690 c/p:close   ()V
    //   302: goto -127 -> 175
    //   305: astore_3
    //   306: aload_1
    //   307: invokevirtual 690 c/p:close   ()V
    //   310: aload_3
    //   311: athrow
    //   312: astore 8
    //   314: aload 6
    //   316: invokevirtual 689 android/database/sqlite/SQLiteDatabase:close    ()V
    //   319: aload 5
    //   321: invokevirtual 690 c/p:close   ()V
    //   324: return
    //   325: astore 7
    //   327: aload 6
    //   329: invokevirtual 689 android/database/sqlite/SQLiteDatabase:close    ()V
    //   332: aload 5
    //   334: invokevirtual 690 c/p:close   ()V
    //   337: aload 7
    //   339: athrow
    // Local variable table:
    //   start  length  slot    name    signature
    //   0  340 0   this    ParsianPMB
    //   75 232 1   localp1 c.p
    //   226    1   2   localIOException    IOException
    //   305    6   3   localObject1    Object
    //   296    1   4   localSQLException1  android.database.SQLException
    //   185    148 5   localp2 c.p
    //   197    131 6   localSQLiteDatabase1    android.database.sqlite.SQLiteDatabase
    //   325    13  7   localObject2    Object
    //   312    1   8   localSQLException2  android.database.SQLException
    //   88 79  10  localSQLiteDatabase2    android.database.sqlite.SQLiteDatabase
    //   102    167 11  localCursor android.database.Cursor
    //   152    139 12  i1  int
    // Exception table:
    //   from   to  target  type
    //   76 80  226 java/io/IOException
    //   80 151 296 android/database/SQLException
    //   154    166 296 android/database/SQLException
    //   166    171 296 android/database/SQLException
    //   238    290 296 android/database/SQLException
    //   80 151 305 finally
    //   154    166 305 finally
    //   166    171 305 finally
    //   238    290 305 finally
    //   199    215 312 android/database/SQLException
    //   199    215 325 finally
  }

/*错误*/
公开最终作废b（）
{
//字节码：
//0:aload_0
//1:getfield 68示例/com/PackagePMB:y Lc/y；
//4:ifnonnull+15->19
//7:aload_0
//8：新640立方英尺/年
//11:dup
//12:aload_0
//第13条：特别是第643条，是：（Lc/w；）V
//16:putfield 68示例/com/PackagePMB:y Lc/y；
//19:getstatic 645 c/g:m B
//22:ifeq+18->40
//25:aload_0
//26:getfield174example/com/PackagePMB:pljava/util/Stack；
//29:invokeVirtual648java/util/Stack:size（）I
//32:ifle+8->40
//35:aload_0
//36:invokevirtual457示例/com/PackagePMB:j（）V
//39：返回
//40:aload_0
//41:getfield174example/com/PackagePMB:pljava/util/Stack；
//44:invokeVirtual651java/util/Stack:removeAllements（）V
//47:aload_0
//48:getfield 176示例/com/PackagePMB:u Lc/ag；
//51:aload_0
//52:getfield558示例/com/PackagePMB:f Lc/c；
//55:invokevirtual 190 c/ag:a（Landroid/view/view；）V
//58:aload_0
//59:getfield 176示例/com/PackagePMB:u Lc/ag；
//62:invokevirtual 192 c/ag:b（）V
//65：新653 c/p
//68:dup
//69:getstatic 61示例/com/PackagePMB:a Lexample/com/PackagePMB；
//72:invokespecial 654 c/p:（Landroid/content/Context；）V
//75:astore_1
//76:aload_1
//77:invokevirtual 655 c/p:a（）V
//80:aload_1
//81:invokevirtual 656 c/p:b（）V
//84:aload_1
//85:invokevirtual660 c/p:getReadableDatabase（）Landroid/database/sqlite/SQLiteDatabase；
//88:astore 10
//90:aload 10
//92:ldc_w 662
//95:iconst_0
//96:anewarray 128 java/lang/String
//99:invokevirtual668 android/database/sqlite/SQLiteDatabase:rawQuery（Ljava/lang/String；[Ljava/lang/String；）Landroid/database/Cursor；
//102:astore 11
//104:aload 11
//106:invokeinterface 673 1 0
//111:ifle+55->166
//114:aload_0
//115：新的282 java/lang/StringBuilder
//118:dup
//119:ldc_w 675
//122:invokespecial 285 java/lang/StringBuilder:（Ljava/lang/String；）V
//125:aload 11
//127:invokeinterface 673 1 0
//132:invokevirtual 289 java/lang/StringBuilder:append（I）Ljava/lang/StringBuilder；
//135:ldc_w 677
//138:invokevirtual294java/lang/StringBuilder:append（Ljava/lang/String；）Ljava/lang/StringBuilder；
//141:invokevirtual297java/lang/StringBuilder:toString（）Ljava/lang/String；
//144:iconst_1
//145:invokestatic683android/widget/Toast:makeText（Landroid/content/Context；Ljava/lang/CharSequence；I）Landroid/widget/Toast；
//148:invokevirtual686 android/widget/Toast:show（）V
//151:iconst_0
//152:istore 12
//154:iload 12
//156:aload 11
//158:invokeinterface 673 1 0
//163：如果icmplt+75->238
//166:aload 10
//168:invokevirtual 689 android/database/sqlite/SQLiteDatabase:close（）V
//171:aload_1
//172:调用虚拟690 c/p:关闭（）V
//175：新653 c/p
//178:dup
//179:getstatic 61示例/com/PackagePMB:a Lexample/com/PackagePMB；
//182:invokespecial 654 c/p:（Landroid/content/Context；）V
//185:astore 5
//187:aload 5
//189:调用虚拟656 c/p:b（）V
//192:aload 5
//194:invokevirtual 693 c/p:getWritableDatabase（）Landroid/database/sqlite/SQLiteDatabase；
//197:astore 6
//199:aload 6
//201:ldc_w 695
//204:ldc_w 697
//207:iconst_0
//208:anewarray 128 java/lang/String
//211:invokevirtual 701 android/database/sqlite/SQLiteDatabase:delete（Ljava/lang/String；Ljava/lang/String；[Ljava/lang/String；）I
//214:流行音乐
//215:aload 6
//217:invokevirtual 689 android/database/sqlite/SQLiteDatabase:close（）V
//220:aload 5
//222:invokevirtual 690 c/p:close（）V
//225：返回
//226:astore_2
//227:新703 java/lang/Error
//230:dup
//231:ldc_w 705
//234:invokespecial 706java/lang/Error:（Ljava/lang/String；）V
//237:athrow
//238:aload 11
//240:iload 12
//242:invokeinterface 709 2 0
//247:流行音乐
//248:aload_0
//249:aload 11
//251:aload 11
//253:ldc_w 711
//256:invokeinterface 714 2 0
//261:调用接口717 2 0
//266:aload 11
//268:aload 11
//270:ldc_w 719
//273:invokeinterface 714 2 0
//278:invokeinterface 717 2 0
//283:iconst_0
//284:invokestatic616java/lang/Boolean:valueOf（Z）Ljava/lang/Boolean；
//287:invokespecial 618示例/com/PackagePMB:a（Ljava/lang/String；Ljava/lang/String；Ljava/lang/Boolean；）V
//290:iinc 12 1
//293：转到-139->154
//296:astore 4
//298:aload_1
//299:invokevirtual 690 c/p:close（）V
//302：转到-127->175
//305:astore_3
//306:aload_1
//307:invokevirtual 690 c/p:close（）V
//310:aload_3
//311:athrow
//312:astore 8
//314:aload 6
//316:invokevirtual 689 android/database/sqlite/SQLiteDatabase:close（）V
//319:aload 5
//321:调用虚拟690 c/p:关闭（）V
//324：返回
//325:astore 7
//327:aload 6
//329:invokeVirtual689 android/database/sqlite/SQLiteDatabase:close（）V
//332:aload 5
//334：调用