JDK 11 jdk.compiler.jmod is the JMOD file for JDK 11 Compiler tool, which can be invoked by the "javac" command.

JDK 11 Compiler tool compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.compiler.jmod.

JDK 11 Compiler tool compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Compiler source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.compiler.

You can click and view the content of each source code file in the list below.

⏎ com/sun/tools/javac/model/JavacTypes.java

/*
 * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package com.sun.tools.javac.model;

import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import javax.lang.model.element.*;
import javax.lang.model.type.*;

import com.sun.tools.javac.code.*;
import com.sun.tools.javac.code.Symbol.*;
import com.sun.tools.javac.util.*;
import com.sun.tools.javac.util.DefinedBy.Api;

import static com.sun.tools.javac.code.Kinds.Kind.*;

/**
 * Utility methods for operating on types.
 *
 * <p><b>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.</b></p>
 */
public class JavacTypes implements javax.lang.model.util.Types {

    private final Symtab syms;
    private final Types types;

    public static JavacTypes instance(Context context) {
        JavacTypes instance = context.get(JavacTypes.class);
        if (instance == null)
            instance = new JavacTypes(context);
        return instance;
    }

    protected JavacTypes(Context context) {
        context.put(JavacTypes.class, this);
        syms = Symtab.instance(context);
        types = Types.instance(context);
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public Element asElement(TypeMirror t) {
        switch (t.getKind()) {
            case DECLARED:
            case INTERSECTION:
            case ERROR:
            case TYPEVAR:
                Type type = cast(Type.class, t);
                return type.asElement();
            default:
                return null;
        }
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public boolean isSameType(TypeMirror t1, TypeMirror t2) {
        if (t1.getKind() == TypeKind.WILDCARD || t2.getKind() == TypeKind.WILDCARD) {
            return false;
        }
        return types.isSameType((Type) t1, (Type) t2);
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public boolean isSubtype(TypeMirror t1, TypeMirror t2) {
        validateTypeNotIn(t1, EXEC_OR_PKG_OR_MOD);
        validateTypeNotIn(t2, EXEC_OR_PKG_OR_MOD);
        return types.isSubtype((Type) t1, (Type) t2);
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public boolean isAssignable(TypeMirror t1, TypeMirror t2) {
        validateTypeNotIn(t1, EXEC_OR_PKG_OR_MOD);
        validateTypeNotIn(t2, EXEC_OR_PKG_OR_MOD);
        return types.isAssignable((Type) t1, (Type) t2);
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public boolean contains(TypeMirror t1, TypeMirror t2) {
        validateTypeNotIn(t1, EXEC_OR_PKG_OR_MOD);
        validateTypeNotIn(t2, EXEC_OR_PKG_OR_MOD);
        return types.containsType((Type) t1, (Type) t2);
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public boolean isSubsignature(ExecutableType m1, ExecutableType m2) {
        return types.isSubSignature((Type) m1, (Type) m2);
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public List<Type> directSupertypes(TypeMirror t) {
        validateTypeNotIn(t, EXEC_OR_PKG_OR_MOD);
        Type ty = (Type)t;
        return types.directSupertypes(ty).stream()
                .map(Type::stripMetadataIfNeeded)
                .collect(Collectors.toList());
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public TypeMirror erasure(TypeMirror t) {
        TypeKind kind = t.getKind();
        if (kind == TypeKind.PACKAGE || kind == TypeKind.MODULE)
            throw new IllegalArgumentException(t.toString());
        return types.erasure((Type)t).stripMetadataIfNeeded();
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public TypeElement boxedClass(PrimitiveType p) {
        return types.boxedClass((Type) p);
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public PrimitiveType unboxedType(TypeMirror t) {
        if (t.getKind() != TypeKind.DECLARED)
            throw new IllegalArgumentException(t.toString());
        Type unboxed = types.unboxedType((Type) t);
        if (! unboxed.isPrimitive())    // only true primitives, not void
            throw new IllegalArgumentException(t.toString());
        return (PrimitiveType)unboxed;
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public TypeMirror capture(TypeMirror t) {
        validateTypeNotIn(t, EXEC_OR_PKG_OR_MOD);
        return types.capture((Type)t).stripMetadataIfNeeded();
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public PrimitiveType getPrimitiveType(TypeKind kind) {
        switch (kind) {
        case BOOLEAN:   return syms.booleanType;
        case BYTE:      return syms.byteType;
        case SHORT:     return syms.shortType;
        case INT:       return syms.intType;
        case LONG:      return syms.longType;
        case CHAR:      return syms.charType;
        case FLOAT:     return syms.floatType;
        case DOUBLE:    return syms.doubleType;
        default:
            throw new IllegalArgumentException("Not a primitive type: " + kind);
        }
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public NullType getNullType() {
        return (NullType) syms.botType;
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public NoType getNoType(TypeKind kind) {
        switch (kind) {
        case VOID:      return syms.voidType;
        case NONE:      return Type.noType;
        default:
            throw new IllegalArgumentException(kind.toString());
        }
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public ArrayType getArrayType(TypeMirror componentType) {
        switch (componentType.getKind()) {
        case VOID:
        case EXECUTABLE:
        case WILDCARD:  // heh!
        case PACKAGE:
        case MODULE:
            throw new IllegalArgumentException(componentType.toString());
        }
        return new Type.ArrayType((Type) componentType, syms.arrayClass);
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public WildcardType getWildcardType(TypeMirror extendsBound,
                                        TypeMirror superBound) {
        BoundKind bkind;
        Type bound;
        if (extendsBound == null && superBound == null) {
            bkind = BoundKind.UNBOUND;
            bound = syms.objectType;
        } else if (superBound == null) {
            bkind = BoundKind.EXTENDS;
            bound = (Type) extendsBound;
        } else if (extendsBound == null) {
            bkind = BoundKind.SUPER;
            bound = (Type) superBound;
        } else {
            throw new IllegalArgumentException(
                    "Extends and super bounds cannot both be provided");
        }
        switch (bound.getKind()) {
        case ARRAY:
        case DECLARED:
        case ERROR:
        case TYPEVAR:
            return new Type.WildcardType(bound, bkind, syms.boundClass);
        default:
            throw new IllegalArgumentException(bound.toString());
        }
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public DeclaredType getDeclaredType(TypeElement typeElem,
                                        TypeMirror... typeArgs) {
        ClassSymbol sym = (ClassSymbol) typeElem;

        if (typeArgs.length == 0)
            return (DeclaredType) sym.erasure(types);
        if (sym.type.getEnclosingType().isParameterized())
            throw new IllegalArgumentException(sym.toString());

        return getDeclaredType0(sym.type.getEnclosingType(), sym, typeArgs);
    }

    @DefinedBy(Api.LANGUAGE_MODEL)
    public DeclaredType getDeclaredType(DeclaredType enclosing,
                                        TypeElement typeElem,
                                        TypeMirror... typeArgs) {
        if (enclosing == null)
            return getDeclaredType(typeElem, typeArgs);

        ClassSymbol sym = (ClassSymbol) typeElem;
        Type outer = (Type) enclosing;

        if (outer.tsym != sym.owner.enclClass())
            throw new IllegalArgumentException(enclosing.toString());
        if (!outer.isParameterized())
            return getDeclaredType(typeElem, typeArgs);

        return getDeclaredType0(outer, sym, typeArgs);
    }
    // where
        private DeclaredType getDeclaredType0(Type outer,
                                              ClassSymbol sym,
                                              TypeMirror... typeArgs) {
            if (typeArgs.length != sym.type.getTypeArguments().length())
                throw new IllegalArgumentException(
                "Incorrect number of type arguments");

            ListBuffer<Type> targs = new ListBuffer<>();
            for (TypeMirror t : typeArgs) {
                if (!(t instanceof ReferenceType || t instanceof WildcardType))
                    throw new IllegalArgumentException(t.toString());
                targs.append((Type) t);
            }
            // TODO: Would like a way to check that type args match formals.

            return (DeclaredType) new Type.ClassType(outer, targs.toList(), sym);
        }

    /**
     * Returns the type of an element when that element is viewed as
     * a member of, or otherwise directly contained by, a given type.
     * For example,
     * when viewed as a member of the parameterized type {@code Set<String>},
     * the {@code Set.add} method is an {@code ExecutableType}
     * whose parameter is of type {@code String}.
     *
     * @param containing  the containing type
     * @param element     the element
     * @return the type of the element as viewed from the containing type
     * @throws IllegalArgumentException if the element is not a valid one
     *          for the given type
     */
    @DefinedBy(Api.LANGUAGE_MODEL)
    public TypeMirror asMemberOf(DeclaredType containing, Element element) {
        Type site = (Type)containing;
        Symbol sym = (Symbol)element;
        if (types.asSuper(site, sym.getEnclosingElement()) == null)
            throw new IllegalArgumentException(sym + "@" + site);
        return types.memberType(site, sym);
    }


    private static final Set<TypeKind> EXEC_OR_PKG_OR_MOD =
        EnumSet.of(TypeKind.EXECUTABLE, TypeKind.PACKAGE, TypeKind.MODULE);

    /**
     * Throws an IllegalArgumentException if a type's kind is one of a set.
     */
    private void validateTypeNotIn(TypeMirror t, Set<TypeKind> invalidKinds) {
        if (invalidKinds.contains(t.getKind()))
            throw new IllegalArgumentException(t.toString());
    }

    /**
     * Returns an object cast to the specified type.
     * @throws NullPointerException if the object is {@code null}
     * @throws IllegalArgumentException if the object is of the wrong type
     */
    private static <T> T cast(Class<T> clazz, Object o) {
        if (! clazz.isInstance(o))
            throw new IllegalArgumentException(o.toString());
        return clazz.cast(o);
    }

    public Set<MethodSymbol> getOverriddenMethods(Element elem) {
        if (elem.getKind() != ElementKind.METHOD
                || elem.getModifiers().contains(Modifier.STATIC)
                || elem.getModifiers().contains(Modifier.PRIVATE))
            return Collections.emptySet();

        if (!(elem instanceof MethodSymbol))
            throw new IllegalArgumentException();

        MethodSymbol m = (MethodSymbol) elem;
        ClassSymbol origin = (ClassSymbol) m.owner;

        Set<MethodSymbol> results = new LinkedHashSet<>();
        for (Type t : types.closure(origin.type)) {
            if (t != origin.type) {
                ClassSymbol c = (ClassSymbol) t.tsym;
                for (Symbol sym : c.members().getSymbolsByName(m.name)) {
                    if (sym.kind == MTH && m.overrides(sym, origin, types, true)) {
                        results.add((MethodSymbol) sym);
                    }
                }
            }
        }

        return results;
    }
}

⏎ com/sun/tools/javac/model/JavacTypes.java

Or download all of them as a single archive file:

File name: jdk.compiler-11.0.1-src.zip
File size: 1347269 bytes
Release date: 2018-11-04
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