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class Father{
int i,j;

Father(){
add(1);
}
void add(int v){
i+=v;
j+=v;
}
void print(){
System.out.println("i:="+i);
System.out.println("j:="+j);
}
}
class Child extends Father{
int i;
Child(){
add(2);
}
void add(int v){
i+=2*v;
j+=2*v;
}
void _print(){
System.out.println("ci:="+i);
}
}
public class Test {
public static void main(String[] args) {
Child c =new Child();
c.add(8);
c.print();
c._print();
}
}

Êä³ö½á¹û£º
i=0;
j=22;
ci=22;
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    Father          Child
    -------           --------
©°©¤©¤> j <©¤©¤©¤©¤ @ i   
©¦    -------          --------    
©¦©¤©¤> j <©¤©¤©¤©¤ @ j      <©¤©´
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©¦    add()          add()    ©¤©È  
©¦    -------          -------       ©¦  
©¸©¤©¤print() <©¤ @ print()  ©¦ 
      -------          -------       ©¦ 
                    ©°©¤©¤ _print() ©¦
                    ©¦    --------   &


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public class Test{
public static void main(String args[]){
System.out.println("This is a test program.");
}
}
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