I don't understand the subject,can anyone help me,plz...
package zh.codegym.task.task08.task0830;
import java.io.BufferedReader;
import java.io.InputStreamReader;
/*
有关算法的任务
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String[] array = new String[20];
for (int i = 0; i < array.length; i++) {
array[i] = reader.readLine();
}
sort(array);
for (String x : array) {
System.out.println(x);
}
}
public static void sort(String[] array) {
//在此编写你的代码
}
// 字符串比较方法：‘a’大于‘b’
public static boolean isGreaterThan(String a, String b) {
return a.compareTo(b) > 0;
}
}