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public interface calrect {
public abstract int calarea();
public abstract int calgirth();
public abstract int getx();
public abstract int gety();
}
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class RRect implements calrect{
private int x;
private int y;
public RRect (){
x=3;y=4;
}
public int calarea(){
return x*y;
}
public int calgirth(){
return x*2+y*2;
}
public int getx(){
return x;
}
public int gety(){
return y;
}
}
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//¶¨ÒåClass1Àà
public class Class1{
RRect rect;
public static void main(String []args){
RRect rect=new RRect();
System.out.println("¾ØÕóµÄ³¤"+ rect.getx());
System.out.println("¾ØÕóµÄ¿í"+ rect.calarea());
System.out.println("¾ØÕóµÄÃæ»ý"+ rect.calarea());
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