Inheritance exercise(1)

public class AA {

 private String str;
 
 public void setStr(String str){
  this.str=str;
 }
 public String getStr(){
  return str;
  
 }
}

 

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public class BB extends AA{
 private int aa;

 

 public void setAa(int aa) {
  this.aa = aa;
 }

 public int getAa() {
  return aa;
 }

}

 

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public class CC extends BB{

 
 public static void main(String []args){
  
  CC cc=new CC();
  
  cc.setStr("Superman");
  cc.setAa(1000);
  System.out.println(cc.getStr());
  System.out.println(cc.getAa());
  

  
 }
}