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    É裺gunΪ¸¸À࣬shootgunºÍpistolΪgunµÄ×ÓÀà¡£
    Java:
    class gun {
        void shoot() {
            System.out.println("gun shoot");
        }
    }
    class shootgun extends gun {
        void shoot() {
            System.out.println("shootgun shoot");
       }
    }
    class pistol extends gun {
       void shoot() {
            System.out.println("pistol shoot");
        }
    }
    C++:
    class gun
    {
        void shoot()
        {
            cout << "gun shoot" << endl;
        }
    };
    class shootgun : gun
    {
        void shoot()
        {
            cout << "shootgun shoot" << endl;
        }
    };
    class pistol : gun
    {
        void shoot()
        {
            cout << "pistol shoot" << endl;
      &n


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   m_progressDlg = ProgressDialog.show(this, getString(R.string.market),getString(R.string.is_visiting), true);
   new Thread() {
    public v ......

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public class Test {
 /**
  * @param args
  */
 public static void main(String[] args) {
  /**
   * ÇóÖÊÊýºÍ£¬
   * Èç:
   * sum(1)=2=2
   * sum(2)=2+3=5
   * sum(3)=2+3+5=10
   * sum(4)=2+3+5+7=17
& ......

Java¶ÔÏó¿½±´

public class Person implements Serializable {
    private String name;
    private int age;
    private GregorianCalendar birthday;
    public Person(){
       
    }
    p ......
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