CallGraph with no main

package doAnalysis;

import java.util.*;

import soot.*;
import soot.jimple.toolkits.callgraph.*;
import soot.options.Options;

public class Copy_3_of_MyCallGraph extends AuxGraph {

    public static ArrayList<SootMethod> getAllMethods() {
        ArrayList<SootMethod> entrypoints = new ArrayList<SootMethod>();
        for (String klass : allClasses) {
            // Error here : allCLass  ?


            // klass such as org.abc.MyClass


            Scene.v().forceResolve(klass, SootClass.SIGNATURES);
            SootClass soot_class = Scene.v().getSootClass(klass);

            // adding all non-abstract method as entrypoint
            for (SootMethod m : soot_class.getMethods()) {
                if (!m.isAbstract()) {
                    entrypoints.add(m);
                }
            }
        }
        return entrypoints;
    }

    public static void main(String[] args) {
        Options.v().set_whole_program(true);
        // Options.v().set_process_dir(Arrays.asList(libDir)); //library dir
        Options.v().set_soot_classpath("../rt.jar:../jce.jar:.");
        // library dir along with rt.jar/jce.jar from JRE/JDK

        Scene.v().setEntryPoints(getAllMethods());
        Scene.v().loadNecessaryClasses();
        PackManager.v().getPack("wjtp").apply();

        PackManager.v().getPack("wjtp")
                .add(new Transform("wjtp.myTrans", new SceneTransformer() {

                    @Override
                    protected void internalTransform(String phaseName,
                            Map options) {
                        CHATransformer.v().transform();
                    }
                }));

        SootClass soot_class = Scene.v()
                .getSootClass("java.lang.reflect.Field");
        SootMethod tgt = getMethod(soot_class, "void setAccessible(boolean)");
        CallGraph cg = Scene.v().getCallGraph();

        @SuppressWarnings("unchecked")
        Iterator<MethodOrMethodContext> source = new Sources(cg.edgesInto(tgt));
        while (source.hasNext()) {
            SootMethod src = (SootMethod) source.next();
            System.out.println(src);
        }

    }
}