build.gradle

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'application'

sourceCompatibility = '1.7'

repositories {
    jcenter()
}

mainClassName = 'EclipseJdtAst'

dependencies {
    compile 'eclipse:jdtcore:3.2.0.v_658'
    compile 'org.eclipse.core:runtime:3.10.0-v20140318-2214'
    compile 'org.eclipse.core:resources:3.3.0-v20070604'
    compile 'org.eclipse.text:org.eclipse.text:3.5.101'
    compile 'commons-io:commons-io:2.4'
}

EclipseJdtAst.java

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jdt.core.dom.AST;
import org.eclipse.jdt.core.dom.ASTParser;
import org.eclipse.jdt.core.dom.ASTVisitor;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jdt.core.dom.FieldDeclaration;
import org.eclipse.jdt.core.dom.VariableDeclarationFragment;

public class EclipseJdtAst {

    public static void main(String[] args) throws CoreException, IOException {

        for (String file : args) {
            File f = new File(file);
            if (!f.exists()) {
                System.out.println("skip path: " + file);
                continue;
            }

            visit(FileUtils.readFileToString(f));
        }
    }

    protected static void visit(String source) {
        ASTParser parser = ASTParser.newParser(AST.JLS3);
        parser.setKind(ASTParser.K_COMPILATION_UNIT);
        parser.setSource(source.toCharArray());
        CompilationUnit unit = (CompilationUnit) parser.createAST(null);
        unit.accept(new ASTVisitor() {
            @Override
            public boolean visit(FieldDeclaration node) {

                for (Object var : node.fragments()) {
                    VariableDeclarationFragment f = (VariableDeclarationFragment) var;
                    System.out.println(String.format("%s:%s%s;", f.getName(), node.getType(),
                            f.getInitializer() == null ? "" : "=" + f.getInitializer()));
                }
                return super.visit(node);
            }
        });
    }
}

run.txt

qty:EclipseJdtCoreAST qrtt1$ ./build/install/EclipseJdtCoreAST/bin/EclipseJdtCoreAST Bitmap.java
TAG:String="Bitmap";
DENSITY_NONE:int=0;
mBuffer:byte[];
mNativePtr:long;
mFinalizer:BitmapFinalizer;
mIsMutable:boolean;
mRequestPremultiplied:boolean;
mNinePatchChunk:byte[];
mNinePatchInsets:NinePatch.InsetStruct;
mWidth:int;
mHeight:int;
mRecycled:boolean;
mDensity:int=getDefaultDensity();
sScaleMatrix:Matrix;
sDefaultDensity:int=-1;
Config:enum;
sConfigs:Config={null,ALPHA_8,null,RGB_565,ARGB_4444,ARGB_8888};
CompressFormat:enum;
nativeInt:int;
WORKING_COMPRESS_STORAGE:int=4096;
CREATOR:Parcelable.Creator<Bitmap>;
mNativeBitmap:long;
mNativeAllocationByteCount:int;