对自定义对象的矢量进行排序 [英] Sort a vector of custom objects

问题描述

如何对自定义对象的矢量进行排序并选择要排序的属性？

How can I sort a vector of my custom object and choose which property to sort by?

我确实看到了这个问题&回答，但我不太清楚它的排序是基于什么的。代码示例优先选择方法论。

I did see this question & answer but I'm not too sure what its sorting it based on. Code example would be prefered to "methodology".

自定义对象的向量排序

public class ItemLocation {
    String icon;
    String title;
    String message;
    String subtext;
    String deviceId;
    double latCoords;
    double lngCoords;
    int expiary;
    int id;
    double proximity;
    String locSeen;
}

推荐答案

以下是一个示例允许您按ItemLocation的指定字段排序：

Below is a example that will allow you to sort by a specified field of ItemLocation:

public void sort(final String field, List<ItemLocation> itemLocationList) {
    Collections.sort(itemLocationList, new Comparator<ItemLocation>() {
        @Override
        public int compare(ItemLocation o1, ItemLocation o2) {
            if(field.equals("icon")) {
                return o1.icon.compareTo(o2.icon);
            } if(field.equals("title")) {
                return o1.title.compareTo(o2.title);
            } else if(field.equals("message")) {
                return o1.message.compareTo(o2.message);
            } 
            .
            . fill in the rest of the fields...
            .
            else if(field.equals("locSeen")) {
                return o1.locSeen.compareTo(o2.locSeen);
            } 
        }           
    });
}

这篇关于对自定义对象的矢量进行排序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！