renzihui

import java.util.ArrayDeque;
import java.util.Deque;
import java.util.concurrent.Executor;

/**
 * An Executor only runs one task at a time.
 */
public class SequentialExecutor implements Executor {

    private final Executor delegate;

renzihui

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

renzihui

import java.lang.ref.PhantomReference;
import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
import java.util.ArrayList;
import java.util.List;


public final class PhantomReferenceSample {

    public static void main(String[] args) {