Intercept Date Constructor

bytebuddy.java

public static void main(String[] args) throws Exception {
  ByteBuddyAgent.install();
  new AgentBuilder.Default()
        .with(AgentBuilder.RedefinitionStrategy.RETRANSFORMATION)
        .with(AgentBuilder.InitializationStrategy.NoOp.INSTANCE)
        .with(AgentBuilder.TypeStrategy.Default.REDEFINE)
        .ignore(new AgentBuilder.RawMatcher.ForElementMatchers(nameStartsWith("net.bytebuddy.").or(isSynthetic()), any(), any()))
        .with(new AgentBuilder.Listener.Filtering(
            new StringMatcher("java.util.Date", StringMatcher.Mode.EQUALS_FULLY),
            AgentBuilder.Listener.StreamWriting.toSystemOut()))
        .type(named("java.util.Date"))
        .transform((builder, type, classLoader, module) ->
            
            builder.visit(Advice.to(Interceptor.class).on(isConstructor()))
        )
        .installOnByteBuddyAgent();
   
   Date date = new Date();
   System.out.println(date)
}

public class Interceptor {

  @Advice.OnMethodExit
  public static void onExit(@Advice.This Date obj) {
    Calendar instance = Calendar.getInstance();
    instance.set(2017, Calendar.SEPTEMBER, 13, 12, 00);
    obj.setTime(instance.getTimeInMillis());
  }
}