本文整理了Java中org.json.JSONObject.optFloat()方法的一些代码示例，展示了JSONObject.optFloat()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。JSONObject.optFloat()方法的具体详情如下：
包路径：org.json.JSONObject
类名称：JSONObject
方法名：optFloat

JSONObject.optFloat介绍

[英]Get the optional double value associated with an index. NaN is returned if there is no value for the index, or if the value is not a number and cannot be converted to a number.
[中]获取与索引关联的可选双精度值。如果索引没有值，或者该值不是数字且无法转换为数字，则返回NaN。

代码示例

代码示例来源：origin: loklak/loklak_server

/**
 * Get the optional double value associated with an index. NaN is returned
 * if there is no value for the index, or if the value is not a number and
 * cannot be converted to a number.
 *
 * @param key
 *            A key string.
 * @return The value.
 */
public float optFloat(String key) {
  return this.optFloat(key, Float.NaN);
}

代码示例来源：origin: b3log/latke

/**
 * Get the optional double value associated with an index. NaN is returned
 * if there is no value for the index, or if the value is not a number and
 * cannot be converted to a number.
 *
 * @param key
 *            A key string.
 * @return The value.
 */
public float optFloat(String key) {
  return this.optFloat(key, Float.NaN);
}

代码示例来源：origin: org.b3log/latke

/**
 * Get the optional double value associated with an index. NaN is returned
 * if there is no value for the index, or if the value is not a number and
 * cannot be converted to a number.
 *
 * @param key
 *            A key string.
 * @return The value.
 */
public float optFloat(String key) {
  return this.optFloat(key, Float.NaN);
}

代码示例来源：origin: stackoverflow.com

public class ProductLineItem {
  private String name;
  private int quantity;
  private float price;

  public MyObject( JSONObject json ) {
   name = json.getString("name");
   count = json.getInt("quantity");
   price = json.optFloat("price");
  }
}