Student astudent = new Student(); Student bstudent = new Student(); Student cstudent = new Student(); astudent.dataDisp(); bstudent.dataDisp(); cstudent.dataDisp(); System.out.println("-------------------------------------"); astudent.setParam("18a0321","上田奈緒子","z1234567",95,'S'); bstudent.setParam("18b0248","仲間寛","w2345678",70,'B'); cstudent.setParam("18c0432","松雪隆子","y3456789",83,'A'); astudent.dataDisp(); bstudent.dataDisp(); cstudent.dataDisp();