1.20 作业

public class ful {
    
    ful(String argus)
    {
         System.out.println("父类的构造函数 ");
    }
    ful()
    {
                  
    }
         
             private String di1;
             
             private String di2;
             
             public String getDi1() {
               return di1;
             }
             public void setYuyin(String di1) {
                 this.di1 = di1;
             }
             public String getDi2() {
                 return di2;
             }
             public void setYuhui(String di2) {
                 this.di2 = di2;
             }
            
             void   di1()
             {
                 System.out.println("父类第一方法");
             }
             void di2()
             {
                 System.out.println("父类第二方法");
             }
}

package lianxi;

public class zil extends ful {
    
    public zil()
    {
        System.out.println("子类的构造函数");
    }
    public void di2()
    {
        System.out.println("子类重写的方法");
    }

}

public class Y1  {
    
    public static void main(String[] args)
    {
        zil zl = new zil();
        
        zl.di1();
        
        zl.di2();
        
       ful fl = new zil();
       
       fl.di1();
       
       fl.di2();
        
    }