设计模式--Builder模式-白红宇

设计模式--Builder模式

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发布时间：2019-06-21

本文共 1945 字，大约阅读时间需要 6 分钟。

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1   public class Main5{ 2        3       private final int servingSize; 4        5       private final int servings; 6        7       private final int calories; 8        9       private final int fat;10      11      private final int sodium;12      13      private final int carbohydrate;14      15      public static class Builder{16          17          private final int servingSize;18          19          private final int servings;20          21          private int calories = 0;22          23          private int fat = 0;24          25          private int sodium = 0;26          27          private int carbohydrate = 0;28          29          public Builder(int servingSize,int servings){30              this.servingSize = servingSize;31              this.servings = servings;32          }33          34          public Builder calories(int calories){35              this.calories = calories;36              return this;37          }38          39          public Builder fat(int fat){40              this.fat = fat;41              return this;42          }43          44          public Builder sodium(int sodium){45              this.sodium = sodium;46              return this;47          }48          49          public Builder carbohydrate(int carbohydrate){50              this.carbohydrate = carbohydrate;51              return this;52          }53          54          public Main5 build(){55              return new Main5(this);56          }57      }58      59      private Main5(Builder builder){60          servingSize = builder.servingSize;61          servings = builder.servings;62          calories = builder.calories;63          fat = builder.fat;64          sodium = builder.sodium;65          carbohydrate = builder.carbohydrate;66      }67  }