java弱引用如何结合队列使用

public class GCTarget {

    // 对象的ID

    public String id;

    // 占用内存空间

    byte[] buffer = new byte[1024];

    public GCTarget(String id) {

        this.id = id;

    }

    protected void finalize() throws Throwable {

        // 执行垃圾回收时打印显示对象ID

        System.out.println("Finalizing GCTarget, id is : " + id);

    }

}