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com.sun.tools.javac.jvm
public class: ClassFile [javadoc | source]

java.lang.Object
   com.sun.tools.javac.jvm.ClassFile

Direct Known Subclasses:
    ClassWriter

A JVM class file.

Generic Java classfiles have one additional attribute for classes, methods and fields:

  "Signature" (u4 attr-length, u2 signature-index)
 

A signature gives the full Java type of a method or field. When used as a class attribute, it indicates type parameters, followed by supertype, followed by all interfaces.

    methodOrFieldSignature ::= type
    classSignature         ::= [ typeparams ] supertype { interfacetype }
 

The type syntax in signatures is extended as follows:

    type       ::= ... | classtype | methodtype | typevar
    classtype  ::= classsig { '.' classsig }
    classig    ::= 'L' name [typeargs] ';'
    methodtype ::= [ typeparams ] '(' { type } ')' type
    typevar    ::= 'T' name ';'
    typeargs   ::= '<' type { type } '>'
    typeparams ::= '<' typeparam { typeparam } '>'
    typeparam  ::= name ':' type
 

This class defines constants used in class files as well as routines to convert between internal ``.'' and external ``/'' separators in class names.

This is NOT part of any supported API. If you write code that depends on this, you do so at your own risk. This code and its internal interfaces are subject to change or deletion without notice.

Nested Class Summary:
public enum class	ClassFile.Version
public static class	ClassFile.NameAndType	A class for the name-and-type signature of a method or field.

Field Summary
public static final  int	JAVA_MAGIC
public static final  int	CONSTANT_Utf8
public static final  int	CONSTANT_Unicode
public static final  int	CONSTANT_Integer
public static final  int	CONSTANT_Float
public static final  int	CONSTANT_Long
public static final  int	CONSTANT_Double
public static final  int	CONSTANT_Class
public static final  int	CONSTANT_String
public static final  int	CONSTANT_Fieldref
public static final  int	CONSTANT_Methodref
public static final  int	CONSTANT_InterfaceMethodref
public static final  int	CONSTANT_NameandType
public static final  int	CONSTANT_MethodHandle
public static final  int	CONSTANT_MethodType
public static final  int	CONSTANT_InvokeDynamic
public static final  int	MAX_PARAMETERS
public static final  int	MAX_DIMENSIONS
public static final  int	MAX_CODE
public static final  int	MAX_LOCALS
public static final  int	MAX_STACK

Method from com.sun.tools.javac.jvm.ClassFile Summary:
externalize,   externalize,   internalize,   internalize

Methods from java.lang.Object:
clone,   equals,   finalize,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait

Method from com.sun.tools.javac.jvm.ClassFile Detail:
public static byte[] externalize(Name name) { return externalize(name.getByteArray(), name.getByteOffset(), name.getByteLength()); } Return external representation of given name, converting '/' to '.'.
public static byte[] externalize(byte[] buf, int offset, int len) { byte[] translated = new byte[len]; for (int j = 0; j < len; j++) { byte b = buf[offset + j]; if (b == '.') translated[j] = (byte) '/'; else translated[j] = b; } return translated; } Return external representation of buf[offset..offset+len-1], converting '.' to '/'.
public static byte[] internalize(Name name) { return internalize(name.getByteArray(), name.getByteOffset(), name.getByteLength()); } Return internal representation of given name, converting '/' to '.'.
public static byte[] internalize(byte[] buf, int offset, int len) { byte[] translated = new byte[len]; for (int j = 0; j < len; j++) { byte b = buf[offset + j]; if (b == '/') translated[j] = (byte) '.'; else translated[j] = b; } return translated; } Return internal representation of buf[offset..offset+len-1], converting '/' to '.'.