如何使用Java中的自定义比较器对数组进行排序？
假设以下是我们的字符串数组，我们需要对其进行排序：
String[] str = { "Tom", "Jack", "Harry", "Zen", "Tim", "David" };在该sort()方法内，创建一个自定义比较器以对上述字符串进行排序。这里，将两个字符串相互比较，然后继续进行该过程：
Arrays.sort(str, new Comparator < String > () {
public int compare(String one, String two) {
int val = two.length() - one.length();
if (val == 0)
val = one.compareToIgnoreCase(two);
return val;
}
});示例
import java.util.Arrays;
import java.util.Comparator;
public class Demo {
public static void main(String[] args) {
String[] str = { "Tom", "Jack", "Harry", "Zen", "Tim", "David" };
System.out.println("Array...");
for (String res : str)
System.out.print(res + " ");
Arrays.sort(str, new Comparator<String>() {
public int compare(String one, String two) {
int val = two.length() - one.length();
if (val == 0)
val = one.compareToIgnoreCase(two);
return val;
}
});
System.out.println("\nSorted array...");
for (String res : str)
System.out.print(res + " ");
}
}输出结果
Array... Tom Jack Harry Zen Tim David Sorted array... David Harry Jack Tim Tom Zen