Java 收集方法反转，填充，复制，最大和最小。

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import java.util.List;

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import java.util.Arrays;// 来 自 NowJava.com - 时  代  Java

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import java.util.Collections;

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public class Main 

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{

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   public static void main(String[] args)

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   {

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      // create and display a List< Character >

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      Character[] letters = {'P', 'C', 'M'};

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      List<Character> list = Arrays.asList(letters); // get List

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      System.out.println("list contains: ");

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      output(list);

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      // reverse and display the List<Character>/* from N o w J a v a . c o m*/

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      Collections.reverse(list); // reverse order the elements

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      System.out.printf("%nAfter calling reverse, list contains:%n");

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      output(list);

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      // create copyList from an array of 3 Characters

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      Character[] lettersCopy = new Character[3]; 

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      List<Character> copyList = Arrays.asList(lettersCopy); 

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      // copy the contents of list into copyList

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      Collections.copy(copyList, list);

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      System.out.printf("%nAfter copying, copyList contains:%n");

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      output(copyList);

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      // fill list with Rs 

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      Collections.fill(list, 'R'); 

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      System.out.printf("%nAfter calling fill, list contains:%n");

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      output(list);

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   } 

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   // output List information

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   private static void output(List<Character> listRef)

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   {

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      System.out.print("The list is: ");

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