Comparator接口,String類數組按字符串長度排序

package zzy;
import static java.lang.System.*;
import java.util.*;
/**
 *
 * @author Zhu Zhengyan
 */
public class zzy9 {
    public static void main(String[] args)
    {
        String[] m = {"zzy","zknm","lt"};
        Arrays.sort(m,new LengthComparator());   //Arrays.sort可以傳入一個comparator對象
        out.println(Arrays.toString(m));
        
    }
}
class LengthComparator implements Comparator<String>    
{
    public int compare(String a,String b)
    {
        return a.length()-b.length();
    }
}