Dagger2 sub components example

Testing.java

package com.example;

import javax.inject.Scope;
import javax.inject.Singleton;

import dagger.Component;
import dagger.Module;
import dagger.Provides;
import dagger.Subcomponent;

public class Testing {
    public class A {

    }

    @Scope
    public @interface BScope {

    }

    @Scope
    public @interface CScope {

    }

    @Module
    public class AModule {
        @Provides
        public A provideA() {
            return new A();
        }
    }

    @Singleton
    @Component(modules = AModule.class)
    public interface ACompononent {
        BComponent newBComponent();
    }

    @BScope
    @Subcomponent
    public interface BComponent {
        CComponent newCComponent();
    }

    @CScope
    @Subcomponent
    public interface CComponent {
        A getA();
    }
    
    public void test() {
        ACompononent aCompononent = DaggerTesting_ACompononent.builder().aModule(new AModule()).build();
        BComponent bComponent = aCompononent.newBComponent();
        CComponent cComponent = bComponent.newCComponent();
        A a = cComponent.getA();
    }
}

Testing2.java

package net.daverix.TransparentCalendarWidget2;

import javax.inject.Scope;
import javax.inject.Singleton;

import dagger.Component;
import dagger.Module;
import dagger.Provides;
import dagger.Subcomponent;

public class Testing {
    public static class A {

    }

    public static class B {
        private A a;
        public B(A a) {
          this.a = a;
        }
    }

    public static class C {
        private B b;
        public C(B b) {
          this.b = b;
        }
    }

    @Scope
    public @interface BScope {

    }

    @Scope
    public @interface CScope {

    }

    @Module
    public static class AModule {
        public AModule() {
        }

        @Provides
        public A provideA() {
            return new A();
        }
    }
    
    @Module
    public static class BModule {
        @Provides
        public B provideB(A a) {
            return new B(a);
        }
    }
    
    @Module
    public static class CModule {
        public CModule() {
        }

        @Provides
        public C provideC(B b) {
            return new C(b);
        }
    }

    @Singleton
    @Component(modules = AModule.class)
    public interface ACompononent {
        BComponent newBComponent();
    }

    @BScope
    @Subcomponent(modules = BModule.class)
    public interface BComponent {
        CComponent newCComponent();
    }

    @CScope
    @Subcomponent(modules = CModule.class)
    public interface CComponent {
        C getC();
    }
    
    public void test() {
        ACompononent aCompononent = DaggerTesting_ACompononent.create();
        BComponent bComponent = aCompononent.newBComponent();
        CComponent cComponent = bComponent.newCComponent();
        C c = cComponent.getC();
    }
}

too complicate to understand

This example is really bad. A, B, C... go figure....

If I have ExampleActivity and ExampleFragment, how can I inject component B in ExampleActivity and Component C in Example Fragment as per above code? How to Inject?