javap 反编译

 static {};
    Code:
       0: ldc           #18                 // String ConnectionManager
       2: invokestatic  #20                 // Method org/apache/log4j/Logger.getLogger:(Ljava/lang/String;)Lorg/apache/log4j/Logger;
       5: putstatic     #26                 // Field logger:Lorg/apache/log4j/Logger;
       8: new           #1                  // class com/casino/connection/ConnectionManager
      11: dup
      12: invokespecial #28                 // Method "<init>":()V
      15: putstatic     #31                 // Field instance:Lcom/casino/connection/ConnectionManager;
      18: return
    LineNumberTable:
      line 29: 0
      line 30: 8
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
里面的 #18   #20   
         line 29: 0  代表设么意思？？？？