//定义一个接口，里面放置多个方法
public interface CountManagement {
double count(double n,double m,char tag);
double count(double up,double down,double h);
double eqAax(double num1,double num2);
}
//定义一个接口，里面需要实现多个方法
public interface Valida extends CountManagement {
boolean YESE = true;
boolean NOT=false;
int MAX_AGE=18;
int MAX_LEN=16;
int MIN_LEN=6;
boolean validateAge(int age);
boolean calidate(String password);
}
//实现两个接口继承之后的所有方法
public class Validatamanager implements Valida{
@Override
public double count(double n, double m, char tag) {
return 0;
}

@Override
public double count(double up, double down, double h) {return 0;
}@Override
public double eqAax(double num1, double num2) {return 0;
}@Override
public boolean calidate(String password) {return false;
}@Override
public boolean validateAge(int age) {return false;
}@Override
public boolean equals(Object obj) {return super.equals(obj);
}

}