Question

我有3个值，如

a^100,b^200,c^150

我需要按照

的顺序对这些值进行排序

b^200,c^150,a^100

我怎么能在java中做到这一点？

Answer 1

使用自定义Comparator，如下所示：

public class IntegerSubstringCompare implements Comparator<String> {
    @Override
    public int compare(String left, String right) {
        Integer leftInt = Integer.parseInt(left.substring(left.indexOf("^") + 1));
        Integer rightInt = Integer.parseInt(right.substring(right.indexOf("^") + 1));

        return -1 * leftInt.compareTo(rightInt);
    }
}

你可以像这样使用它：

public static void main(String[] args) {
    String[] input = {"a^100", "b^200", "c^150"};
    List<String> inputList = Arrays.asList(input);
    Collections.sort(inputList, new IntegerSubstringCompare());
    System.out.println(inputList);
}

Answer 2

String sample = "a^100,b^200,c^150";
List data = Arrays.asList(sample.split(","));
Collections.sort(data, Collections.reverseOrder( new Comparator<String>() {
public int compare (String obj1,String obj2)
{
  String num1 = obj1.split("\\^")[1];
  String num2 = obj2.split("\\^")[1];
  return  num1.compareTo(num2);
}
}));
String sortedSample[]= (String[])data.toArray(new String[data.size()]);
for (int z=0; z< sortedSample.length;z++ )
System.out.println(sortedSample[z]);

如何使用java基于字母数字值进行排序？

2 个答案: