我将字段定为final，并强制构造函数将值向上传递：
public abstract class Test { private final ArrayList<Object> objects; protected ArrayList<Object> getObjects() { return objects; } protected Test(ArrayList<Object> objects) { this.objects = objects; }}public class TestSubA extends Test { public TestSubA() { super(new ArrayList<Object>(20)); // Other stuff }}public class TestSubB extends Test { public TestSubB() { super(new ArrayList<Object>(100)); // Other stuff }}
