android，比较器排序错误

Question

我有一个比较器按3个值排序：

1. ORDER_BY_Points
2. ORDER_BY_Gdif //目标差异
3. ORDER_BY_Goals

首先，我从json字符串中获取一个数组。我将数组发送到StandingsSort.ORDER_BY_RULES

Arrays.sort(addressArray, StandingsSort.ORDER_BY_RULES);

这是我的代码：

static final Comparator<Standings> ORDER_BY_Points = new Comparator<Standings>() {
    public int compare(Standings a1, Standings a2) {
        return a1.points.compareTo(a2.points);
    }
};
static final Comparator<Standings> ORDER_BY_Gdif = new Comparator<Standings>() {
    public int compare(Standings a1, Standings a2) {
        return a1.Gdif.compareTo(a2.Gdif);
    }
};
static final Comparator<Standings> ORDER_BY_Goals = new Comparator<Standings>() {
    public int compare(Standings a1, Standings a2) {
        return a1.goalsP.compareTo(a2.goalsP);
    }
};

static final Comparator<Standings> ORDER_BY_RULES = new Comparator<Standings>() {
    public int compare(Standings a1, Standings a2) {
        int i = ORDER_BY_Points.compare(a1,a2);
        if(i == 0){
            i = ORDER_BY_Gdif.compare(a1,a2);
            if(i == 0){
                i = ORDER_BY_Goals.compare(a1,a2);
            }
        }
        return i;
    }
};

class Standings {

    String teamName;
    String goalsP;
    String goalsM;
    String Gdif;
    String points;
    @Override
    public String toString() {
        return "" + teamName + ","  + goalsP + ":" + goalsM + "," + Gdif + "," + points + "";
    }
    public Standings(String teamName, String goalsP,
                String goalsM, String Gdif, String points) {
        super();
        this.teamName = teamName;
        this.goalsP = goalsP;
        this.goalsM = goalsM;
        this.Gdif = Gdif;
        this.points = points;
    }
}

但结果不行！结果如下

Name, Goals, GDif, Points
Team,11:9,2,10
Team,5:3,2,10
Team,9:2,7,11
Team,0:6,-6,2
Team,3:9,-6,2
Team,6:9,-3,3
Team,8:13,-5,3
Team,8:9,-1,5
Team,8:11,-3,5
Team,8:7,1,5

为什么比较器排序错误？

Answer 1

由于您将点存储为String s，＆＃34; 10＆＃34;来自＆＃34; 2＆＃34;，＆＃34; 3＆＃34;和＆＃34; 5＆＃34;。如果您想按数值顺序比较它们，则需要先将它们转换为int。

同样，Gdif和Goals被比作String s，这可能不是你想要的。