L，Z和Java方法簽名V

Question

我越來越

java.lang.AbstractMethodError: javax.xml.parsers.DocumentBuilderFactory.setFeature(Ljava/lang/String;Z)V 

L，Z和V站在什麼呢？

Answer 1

JVM規範的Section 4.3.2：

 
Character  Type   Interpretation 
------------------------------------------ 
B    byte   signed byte 
C    char   Unicode character 
D    double  double-precision floating-point value 
F    float   single-precision floating-point value 
I    int   integer 
J    long   long integer 
L<classname>; reference  an instance of class 
S    short   signed short 
Z    boolean  true or false 
[    reference  one array dimension 

Answer 2

這些類型簽名原語：

Type Signature Java Type V void Z boolean B byte C char S short I int J long F float D double L fully-qualified-class ; fully-qualified-class [ type type[]

setFeature需要String和boolean並返回void。