import java.util.Objects;
 
class Employee {
    int empNo;
 
    public void disp() {
        System.out.println("empNo : " + empNo);
    }
}
 
class Sales extends Employee {
    String custName;
 
    public void disp() {
        super.disp();
        System.out.println("custName : " + custName);
    }
}
 
class Company {
    public static void main(String[] args) {
        Employee emp = new Employee();
        Sales sal = new Sales();
 
        emp.empNo = 100;
        sal.custName = "Best Company";
 
        sal.disp();
 
        System.out.println("----------------------------------------");
        System.out.println("empとsalは等しいか？->" + Objects.equals(emp, sal));
        System.out.println("empに入ってるempNo->" + emp.empNo);
        System.out.println("salに入ってるempNo->" + sal.empNo);
        System.out.println("----------------------------------------");
 
        Sales rookie = new Sales();
        Employee employee100 = rookie;
 
        employee100.empNo = 100;
        rookie.custName = "Best Company";
 
        rookie.disp();
 
        System.out.println("----------------------------------------");
        System.out.println("rookieとemployee100は等しいか？->" + Objects.equals(rookie, employee100));
        System.out.println("rookieに入ってるempNo->" + rookie.empNo);
        System.out.println("employee100に入ってるempNo->" + employee100.empNo);
    }
}

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