abstract1.java

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abstract class 档屈{
  double 搁利;
  public abstract void 弊府促();
  public double 搁利备窍扁(){
  	return 搁利;
  }	
}
class 伙阿屈 extends 档屈{
  double 关函,臭捞;
  public 伙阿屈(int a, int b){
  	关函=a;
  	臭捞=b;
  	搁利=关函*臭捞/2;
  }
  public void 弊府促(){
    System.out.println("伙阿屈阑 弊赴促");
  }
}
class 荤阿屈 extends 档屈{
  double 啊肺,技肺;
  public 荤阿屈(int a, int b){
  	啊肺=a;
  	技肺=b;
  	搁利=啊肺*技肺;
  }
  public void 弊府促(){
    System.out.println("荤阿屈阑 弊赴促");
  }
}
public class Abstract1{
  public static void main(String[] args){
    档屈 tr=new 伙阿屈(10,20);
    档屈 re=new 荤阿屈(10,20);
    System.out.println(tr.搁利备窍扁());
    tr.弊府促();
    System.out.println(re.搁利备窍扁());
    re.弊府促();
  }
}