cn.wjybxx.dson.text.INumberStyle Maven / Gradle / Ivy
/*
* Copyright 2023-2024 wjybxx([email protected])
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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package cn.wjybxx.dson.text;
/**
* 数字的打印格式
* 如果实现类是有状态的,应当小心多线程问题,如果可能被多线程使用。
*
* Q:该接口产生的原因?
* A:多数情况下我们都可以使用普通的{@link NumberStyle},但存在一个常见但无法默认支持的需求:浮点数的打印精度控制。
* 浮点数有个常见的弊端,toString的结果可能非常非常长 —— 因为浮点数的精度有限,不能准确表达某些数,因此是近似值,
* 但这样长的字符串通常不是我们想要的,因此某些时候需要能设定打印精度。
*
* @author wjybxx
* date - 2023/7/15
*/
public interface INumberStyle {
void toString(int value, StyleOut styleOut);
void toString(long value, StyleOut styleOut);
void toString(float value, StyleOut styleOut);
void toString(double value, StyleOut styleOut);
}