java 排序

如果你想按照数字排序，那就不要放字符串进去，
list.add(92.8);
如果已经是字符串，可以这样

Java code

import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; public class T { public static void main(String[] args) { ArrayList list = new ArrayList(); list.add("92.8"); list.add("68.9"); list.add("168.61"); list.add("242"); list.add("317"); list.add("105"); // 字符串排序 Collections.sort(list); System.out.println(list.toString()); // [105, 168.61, 242, 317, 68.9, 92.8] Collections.sort(list, new Comparator() { @Override public int compare(Object o1, Object o2) { return new Double((String) o1).compareTo(new Double((String) o2)); } }); System.out.println(list.toString()); // [68.9, 92.8, 105, 168.61, 242, 317] } }