學(xué)習(xí)系統(tǒng)的BroadcastFilter類的方法
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("BroadcastFilter{");
sb.append(Integer.toHexString(System.identityHashCode(this)));
sb.append(" u");
sb.append(owningUserId);
sb.append(' ');
sb.append(receiverList);
sb.append('}');
return sb.toString();
}
