Java语言程序设计梁勇第21-30章全部完整习题答案

学习编程最重要的还是要靠自己动手做练习，此文档是Java语言程序设计（梁勇）一书第21-30章完整的习题答案，可以很好地帮助我们学习提高！

import java.util.*;

public class Exercise21_01 {
  public static void main（String[] args） {
    linkedHashSet set1 = new linkedHashSet（Arrays.asList（
      new String[]{“George“ “Jim“ “John“ “Blake“ “Kevin“ “Michael“}））;

    linkedHashSet set1Clone1 = （linkedHashSet）set1.clone（）;
    linkedHashSet set1Clone2 = （linkedHashSet）set1.clone（）;

    linkedHashSet set2 = new linkedHashSet（Arrays.asList（
      new String[] {“George“ “Katie“ “Kevin“ “Michelle“ “Ryan“}））;

    set1.addAll（set2）;
    set1Clone1.removeAll（set2）;
    set1Clone2.retainAll（set2）;

    System.out.println（“The union of the two sets is “ + set1）;
    System.out.println（“The difference of the two sets is “ + set1Clone1）;
    System.out.println（“The intersection of the two sets is “ + set1Clone2）;
  }
}

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     文件       9549  2013-05-15 16:52  chapter24\Exercise24_01.java

     文件      10292  2013-05-15 16:52  chapter24\Exercise24_02.java

     文件       8547  2013-05-15 16:52  chapter24\Exercise24_03.java

     文件       1837  2013-05-15 16:52  chapter24\Exercise24_04.java

     文件        608  2013-05-15 16:52  chapter24\Exercise24_05.java

     文件        983  2013-05-15 16:52  chapter24\Exercise24_06.java

     文件       5626  2013-07-25 06:56  chapter24\Exercise24_07.java

     文件      10881  2013-07-25 06:56  chapter24\Exercise24_08.java

     文件      14509  2013-07-25 06:56  chapter24\Exercise24_09.java

     文件       3188  2013-07-25 06:56  chapter24\Exercise24_10.java

     文件       7857  2013-07-25 06:56  chapter24\Exercise24_11.java

     文件       3286  2013-07-25 06:56  chapter24\Exercise24_12.java

     文件        943  2013-05-15 16:52  chapter24\Exercise24_13.java

     文件       1169  2013-05-15 16:52  chapter24\Exercise24_14.java

     文件      11605  2013-05-15 16:52  chapter25\Exercise25_01.java

     文件       4145  2013-09-11 18:57  chapter25\Exercise25_01Extra.java

     文件       4748  2013-09-11 20:59  chapter25\Exercise25_02Extra.java

     文件       9487  2013-05-15 16:52  chapter25\Exercise25_03.java

     文件       5443  2013-09-11 21:27  chapter25\Exercise25_03Extra.java

     文件       9675  2013-05-15 16:52  chapter25\Exercise25_04.java

     文件       9648  2013-05-15 16:52  chapter25\Exercise25_05.java

     文件      10439  2013-05-15 16:52  chapter25\Exercise25_06.java

     文件       7750  2013-05-15 16:52  chapter25\Exercise25_07.java

     文件       9507  2013-05-22 21:24  chapter25\Exercise25_08.java

     文件       9990  2013-05-22 19:57  chapter25\Exercise25_09.java

     文件      10040  2013-05-22 21:24  chapter25\Exercise25_10.java

     文件       4154  2013-07-25 06:56  chapter25\Exercise25_11.java

     文件        941  2013-05-23 09:12  chapter25\Exercise25_12.java

     文件      14810  2013-07-25 06:56  chapter25\Exercise25_13.java

     文件       3345  2013-05-15 16:52  chapter25\Exercise25_14.java

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