List进行排序

import java.util.Collections;
import java.util.List;
import java.util.ArrayList;
import java.util.Comparator;

public class Java8Tester {
   public static void main(String args[]){
  
      List<String> names1 = new ArrayList<String>();
      names1.add("Google ");
      names1.add("Runoob ");
      names1.add("Taobao ");
      names1.add("Baidu ");
      names1.add("Sina ");
       
      List<String> names2 = new ArrayList<String>();
      names2.add("Google ");
      names2.add("Runoob ");
      names2.add("Taobao ");
      names2.add("Baidu ");
      names2.add("Sina ");
       
      Java8Tester tester = new Java8Tester();
      System.out.println("使用 Java 7 语法: ");
       
      tester.sortUsingJava7(names1);
      System.out.println(names1);
      System.out.println("使用 Java 8 语法: ");
       
      tester.sortUsingJava8(names2);
      System.out.println(names2);
   }
  
   // 使用 java 7 排序
   private void sortUsingJava7(List<String> names){  
      Collections.sort(names, new Comparator<String>() {
         @Override
         public int compare(String s1, String s2) {
            return s1.compareTo(s2);
         }
      });
   }
  
   // 使用 java 8 排序
   private void sortUsingJava8(List<String> names){
      Collections.sort(names, (s1, s2) -> s1.compareTo(s2));
   }
}