String s1 = "18a0345", s2 = "大島優人", s3 = "z4567890"; int po = 88; char ev = 'A'; Student astudent = new Student(); astudent.setParam(s1, s2, s3, po, ev); System.out.println("astudentの表示"); astudent.dataDisp(); System.out.println("-------------------------------------"); Student student = astudent; student.code = "z5678901"; student.point = 80; System.out.println("studentを変更後:"); System.out.println("studentの表示"); student.dataDisp(); System.out.println("astudentの表示"); astudent.dataDisp();