尝试将构建器模式从 java 解析为 apex答案

【问题标题】：Trying to resolve builder-pattern from java to apex尝试将构建器模式从 java 解析为 apex
【发布时间】：2022-12-06 08:47:45
【问题描述】：

`我一直在研究构建器模式，在将代码从 Java 编写到 Apex 时遇到了问题。它适用于 Java，但在 Apex 上出现问题

这是我的 Apex - 课程。

`public class Chiller {

    private double coolingCapacity;
    private double compressorPower;
    private double EER;
    RefrigerationType refrigerationType;

    public void setCoolingCapacity(double coolingCapacity) {
        this.coolingCapacity = coolingCapacity;
    }

    public void setCompressorPower(double compressorPower) {
        this.compressorPower = compressorPower;
    }

    public void setEER(double EER) {
        this.EER = EER;
    }

    public void setRefrigerationType(RefrigerationType refrigerationType) {
        this.refrigerationType = refrigerationType;
    }

    public override String toString() {
        return 'Chiller [Cooling capacity = ' + coolingCapacity + ' compressor power input = ' + compressorPower + ' EER = ' + Math.round(EER) +
                ' refrigeration type is ' + refrigerationType + ']';
    }
}

公共枚举 RefrigerationType {R134, R12}

public abstract class ChillerBuilder {
    Chiller chiller;
    public void createChiller() {
        chiller = new Chiller();
    }

    public abstract void buildCapacity();
    public abstract void buildCompressorPower();
    public abstract void buildEER();
    public abstract void buildRefrigerationType ();

    Chiller getChiller() {
        return chiller;
    }
}

public class ScrewBuilder extends ChillerBuilder {
    public override void buildCapacity() {
        chiller.setCoolingCapacity(((12-7)*1042*1000/3600));
    }
    public override void buildCompressorPower() {
        chiller.setCompressorPower(((12-7)*1042*1000/3600)*0.83);
    }
    public override void buildEER() {
        chiller.setEER(((12-7)*1042*1000/3600)/(((12-7)*1042*1000/3600)*0.83));
    }
    public override void buildRefrigerationType() {
        chiller.setRefrigerationType(RefrigerationType.R134);
    }
}

public class Director {
    ChillerBuilder builder;
    void setBuilder(ChillerBuilder b) {
        builder = b;
    }

    Chiller BuildChiller() {
        builder.createChiller();
        builder.buildCapacity();
        builder.buildCompressorPower();
        builder.buildEER();
        builder.buildRefrigerationType();
        Chiller chiller = builder.getChiller();
        return chiller;
    }
}`

问题似乎在 ScrewBuilder 中，类变量与设置器不可见 chiller.setCoolingCapacity(((12-7)10421000/3600)); 你能帮我吗？提前致谢！`



I tried to re-write access fields to public everywhere but it doesn't help

【问题讨论】：

标签： java salesforce apex builder-pattern

【解决方案1】：

Chiller chiller; - 没有 public/protected/private 这东西就变成了私有的。这意味着没有其他人可以使用它，即使是从您扩展的子类。

如果你做到了protected，那么这个值应该在ScrewBuilder中可见

【讨论】：