育才学习网java怎么写
1. 这个用Java怎么写啊
加点分咯，呵呵class Student{ public long sutdentNo; public int classNo; public String name; public String gender; public int age; public Student(long sN,int cN,String n,String g,int a){ this.sutdentNo=sN; this.classNo=cN; this.name=n; this.gender=g; this.age=a; } public Student(){ } public long getStudentNo(){ return this.sutdentNo; } public int getClassNo(){ return this.classNo; } public String getName(){ return this.name; } public String getGender(){ return this.gender; } public int modifyAge(int a){ this.age=age; return this.age; } public int getAge(){ return this.age; } public void getInfo(){ System.out.println（"学号："+getStudentNo()); System.out.println（"姓名："+getName()); System.out.println（"班级："+getClassNo（)+"班"）； System.out.println（"性别："+getGender()); System.out.println（"年龄："+getAge（)+"岁"）； }}class Undergraduate extends Student{ public String specialty; public String degree; public Undergraduate(String s,String d){ this.specialty=s; this.degree=d; } public Undergraduate(){ } public String setSpecialty(String s){ this.specialty=s; return this.specialty; } public String getSpecialty(){ return this.specialty; } public String getDegree(){ return this.degree; } public void getInfo(){ super.getInfo(); System.out.println（"专业："+getSpecialty()); }}class Graduate extends Student{ public String research; public Graduate(String r){ this.research=r; } public Graduate(){ } public String setResearch(String r){ this.research=r; return this.research; } public String getResearch(){ return this.research; }}class Test{ public static void main(String[] args){ Student s=new Student(2006017,238，"小红"，"女"，18); //s.getStudentNo=2005; System.out.println（"学号："+s.getStudentNo()); System.out.println（"姓名："+s.getName()); System.out.println（"班级："+s.getClassNo（)+"班"）； System.out.println（"性别："+s.getGender()); System.out.println（"年龄："+s.getAge（)+"岁"）；Undergraduate u=new Undergraduate（"软件技术"，"学士"）； u.sutdentNo=2007018; u.name="小张"； u.gender="男"； u.age=22; u.classNo=198; System.out.println（"学号："+u.getStudentNo()); System.out.println（"班级："+u.getClassNo()); System.out.println（"姓名："+u.getName()); System.out.println（"年龄："+u.getAge（)+"岁"）； System.out.println（"性别："+u.getGender()); System.out.println（"专业："+u.getSpecialty()); System.out.println（"学位："+u.getDegree()); Graduate gd=new Graduate("java"); gd.sutdentNo=2007019; gd.classNo=190; gd.name="小王"； gd.gender="男"； gd.age=24; System.out.println（"学号："+gd.getStudentNo()); System.out.println（"班级："+gd.getClassNo()); System.out.println（"姓名："+gd.getName()); System.out.println（"性别："+gd.getGender()); System.out.println（"年龄："+gd.getAge（)+"岁"）； System.out.println（"研究方向："+gd.getResearch（)+"技术"）； }}。
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