java類排序

1、實現Comparator接口

public static class ComparatorImpl implements Comparator<Element>{@Overridepublic int compare(Element o1, Element o2) {if(o1.unitPrice > o2.unitPrice)return 1;else if(o1.unitPrice < o2.unitPrice){return -1;}else{return 0;}}}

public static class Element {public int distance; public int fare; public float unitPrice; }

2、調用Collections的sort方法排序

ArrayList<Element> data = new ArrayList<Element>();data.add(...);//sort the data - small to big
ComparatorImpl comp = new ComparatorImpl();
Collections.sort(data, comp);

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