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I'm getting
java.lang.AbstractMethodError: javax.xml.parsers.DocumentBuilderFactory.setFeature(Ljava/lang/String;Z)V
What do L, Z, and V stand for?
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The method signature in java is defined as the structure of the method that is designed by the programmer. The method signature is the combination of the method name and the parameter list. The method signature depicts the behavior of the method i.e types of values of the method, return type of the method, etc.
A signature is a list that specifies a class constructor, an instance method, or a static method, thereby distinguishing it from other constructors, instance methods, or static methods.
V in a type signature means void type. Bytecode does not differentiate constructors from other methods (other than using special method name).
In Java, a method signature paints a picture about how to use the method. The only required elements of a method signature are the method's return type, the method name, parentheses for the parameter list (which can be empty), and the method body inside curly braces (which can also be empty).
What is a method signature in Java? The method signature consists of the method name and the parameter list. Method signature does not include the return type of the method. A class cannot have two methods with same signature.
I'm confused what "V" means? I expected either public Echo (); or something similar... Show activity on this post. The JVM uses a compact way of storing method signatures, of which constructors are considered a special case. Show activity on this post. Show activity on this post. V in a type signature means void type.
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 takes a String and a boolean and returns void.
Method Name: A Java Method Name can be a combination of Alphabets, Numbers and Special Symbols (Underscore and Dollar only). Method name can start with a Letter or Alphabet. Method name can start with either Underscore (_) or Dollar ($) symbol. Method name can not start with a number. Method name can contain numbers in-between or at the end.
Section 4.3.2 of the JVM Spec:
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
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