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2. ¾²Ì¬´úÀí£º
±ÈÈçÒªÔÚÊä³ö“HelloWorld”Ç°´òÓ¡Ò»¸ö×Ö·û´®“Welcome”
A:Ïȶ¨ÒåÒ»¸ö½Ó¿ÚÀà
Java´úÂë
package ttitfly.proxy;       
      
public interface HelloWorld {       
    public void print();       
//  public void say();       
}   
package ttitfly.proxy;

public interface HelloWorld {
public void print();
// public void say();
}
  
B: ¶¨ÒåÒ»¸ö¸Ã½Ó¿ÚµÄʵÏÖÀà
java ´úÂë
Java´úÂë
package ttitfly.proxy;       
      
public class HelloWorldImpl implements HelloWorld{       
      
    public void print(){       
        System.out.println("HelloWorld");       
    }       
//  public void say(){       
//      System.out.println("Say Hello!");       
//  }       
}      
package ttitfly.proxy;

public class HelloWorldImpl implements HelloWorld{

public void print(){
System.out.println("HelloWorld");
}
// public void say(){
// System.out.println("Say Hello!");
// }
}
C:¶¨ÒåÒ»¸ö¾²Ì¬´úÀíÀà
Java´úÂë
package ttitfly.proxy;       
      
public class StaticProxy impleme


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