1回答

• 

  像风一样自由_

  2020-04-02 09:54:32

  package collection;

  
  

  import java.util.ArrayList;

  import java.util.Collections;

  import java.util.List;

  import java.util.Random;

  import java.util.UUID;

  
  

  public class collectionTest {

      public void testSort3() {

          List<String> stList = new ArrayList<String>();

          Random random = new Random();

          String randomStr;

          for(int i=0;i<10;i++) {

              int R = random.nextInt(10);

              do {

                  randomStr = UUID.randomUUID().toString().substring(0, R);

               }while(stList.contains(randomStr));

              stList.add(randomStr);

              System.out.println("将要添加字符串:"+randomStr);

          }

          System.out.println("-----排序前-----");

          for(String s:stList) {

              System.out.println("元素:"+s);

          }

          Collections.sort(stList);

          System.out.println("-----排序后-----");

          for(String s:stList) {

              System.out.println("元素:"+s);

          }

  }

  public static void main(String[] args) {

  // TODO Auto-generated method stub

  collectionTest ct = new collectionTest();

  // ct.testSort1();

  // ct.testSort2(); 

  ct.testSort3();

  }

  
  

  0 0