public class Student{ public Student(String name,int age){ this.name=name; this.age=age; }private String name; private int age ;get/setpublic static void main(String args[]){ Student student = new Student("zhangsan",20); System.out.println(this.name+"今年"+this.age+"岁") }}
class Student { String name ="" ; int age ; char sex ; public void Student ( String _name ,int _age ,char _sex ) { name = _name ; age = _age ; sex = _sex ; } public void print (){ System.out.println("学生:name : "+name+" age "+age+" sex "+sex);
} public class Stu { public static void main (String [] args ) { student stu = new student ("zhangshan" ,18 , m ) ; stu.print () ; student stu1 = new student ("lisi " , 20 , m ); stu1.print () ; } }
public class Student { private int studentNumber;//学号 private int studentClass;//班级 private char sex;//性别 private int age;//年龄 public int getAge() {//该方法获取年龄 return age; } public void setAge(int age) {//该方法设置年龄 this.age = age; } public char getSex() {//该方法获取性别 return sex; } public void setSex(char sex) {//该方法设置性别 this.sex = sex; } public int getStudentClass() {//该方法获取班级 return studentClass; } public void setStudentClass(int studentClass) {//该方法设置班级 this.studentClass = studentClass; } public int getStudentNumber() {//该方法获取学号 return studentNumber; } public void setStudentNumber(int studentNumber) {//该方法设置学号 this.studentNumber = studentNumber; } public Student() { } public Student(int studentNumber, int studentClass, char sex, int age) { this.studentNumber = studentNumber; this.studentClass = studentClass; this.sex = sex; this.age = age; } @Override public String toString() { return "学号:" + studentNumber + ",班级:" + studentClass + ",性别:" + sex + ",年龄" + age; } public static void main(String[] args) { Student s1 = new Student(1, 3, '男', 21); System.out.println(s1); s1.setAge(22); System.out.println(s1); } }
public class Student{
public Student(String name,int age){
this.name=name;
this.age=age;
}private String name;
private int age ;get/setpublic static void main(String args[]){
Student student = new Student("zhangsan",20);
System.out.println(this.name+"今年"+this.age+"岁")
}}
class Student {
private Integer stuId;// 學號
private String name;// 姓名
private Boolean gender;// 性別
private String address;// 地址
private String gradeNo;// 級
private String classNo;// 班 // 無參構造函數
public Student() {
} // 全參構造函數
public Student(Integer stuId, String name, Boolean gender, String address, String gradeNo, String classNo) {
this.stuId = stuId;
this.name = name;
this.gender = gender;
this.address = address;
this.gradeNo = gradeNo;
this.classNo = classNo;
} public Integer getStuId() {
return stuId;
} public void setStuId(Integer stuId) {
this.stuId = stuId;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public Boolean getGender() {
return gender;
} public void setGender(Boolean gender) {
this.gender = gender;
} public String getAddress() {
return address;
} public void setAddress(String address) {
this.address = address;
} public String getGradeNo() {
return gradeNo;
} public void setGradeNo(String gradeNo) {
this.gradeNo = gradeNo;
} public String getClassNo() {
return classNo;
} public void setClassNo(String classNo) {
this.classNo = classNo;
} @Override
public String toString() {
return "{stuId:" + this.stuId + ",name:" + this.name + "}";
}
}
String name ="" ;
int age ;
char sex ;
public void Student ( String _name ,int _age ,char _sex ) {
name = _name ;
age = _age ;
sex = _sex ;
}
public void print (){
System.out.println("学生:name : "+name+" age "+age+" sex "+sex);
}
public class Stu { public static void main (String [] args ) {
student stu = new student ("zhangshan" ,18 , m ) ;
stu.print () ;
student stu1 = new student ("lisi " , 20 , m );
stu1.print () ;
}
}
private int studentClass;//班级
private char sex;//性别
private int age;//年龄 public int getAge() {//该方法获取年龄
return age;
} public void setAge(int age) {//该方法设置年龄
this.age = age;
} public char getSex() {//该方法获取性别
return sex;
} public void setSex(char sex) {//该方法设置性别
this.sex = sex;
} public int getStudentClass() {//该方法获取班级
return studentClass;
} public void setStudentClass(int studentClass) {//该方法设置班级
this.studentClass = studentClass;
} public int getStudentNumber() {//该方法获取学号
return studentNumber;
} public void setStudentNumber(int studentNumber) {//该方法设置学号
this.studentNumber = studentNumber;
} public Student() {
} public Student(int studentNumber, int studentClass, char sex, int age) {
this.studentNumber = studentNumber;
this.studentClass = studentClass;
this.sex = sex;
this.age = age;
} @Override
public String toString() {
return "学号:" + studentNumber + ",班级:" + studentClass + ",性别:" + sex + ",年龄" + age;
} public static void main(String[] args) {
Student s1 = new Student(1, 3, '男', 21);
System.out.println(s1);
s1.setAge(22);
System.out.println(s1);
}
}
问题说的这么笼统
保存可以保存在关系数据库里,也可以自己写个file直接按自定义标准放进去也可以直接object流写
总之,你的问题太笼统相当于啥也没说
所以,我的回答也就不能帮你解决
学JAVA 把基础打牢很重要
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;public class Student implements Serializable{
private int studentNumber;//学号
private int studentClass;//班级
private char sex;//性别
private int age;//年龄 public int getAge() {//该方法获取年龄
return age;
} public void setAge(int age) {//该方法设置年龄
this.age = age;
} public char getSex() {//该方法获取性别
return sex;
} public void setSex(char sex) {//该方法设置性别
this.sex = sex;
} public int getStudentClass() {//该方法获取班级
return studentClass;
} public void setStudentClass(int studentClass) {//该方法设置班级
this.studentClass = studentClass;
} public int getStudentNumber() {//该方法获取学号
return studentNumber;
} public void setStudentNumber(int studentNumber) {//该方法设置学号
this.studentNumber = studentNumber;
} public Student() {
} public Student(int studentNumber, int studentClass, char sex, int age) {
this.studentNumber = studentNumber;
this.studentClass = studentClass;
this.sex = sex;
this.age = age;
} @Override
public String toString() {
return "学号:" + studentNumber + ",班级:" + studentClass + ",性别:" + sex
+ ",年龄" + age;
} public static void main(String[] args) throws Exception{ ArrayList<Student> students = new ArrayList<Student>();
students.add(new Student(1, 1, '男', 21));
students.add(new Student(2, 1, '男', 21));
students.add(new Student(3, 1, '男', 21));
students.add(new Student(4, 1, '男', 21));
students.add(new Student(5, 1, '男', 21));
students.add(new Student(6, 1, '女', 21)); ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(
"c:/student.txt"));
oos.writeObject(students);
oos.close();
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(
"c:/student.txt")); students = (ArrayList<Student>) ois.readObject();
for (int i = 0; i < students.size(); i++) {
System.out.println("*********************第" + i
+ "个学生**************************");
System.out.println(students.get(i));
}
}
}
/*
*********************第0个学生**************************
学号:1,班级:1,性别:男,年龄21
*********************第1个学生**************************
学号:2,班级:1,性别:男,年龄21
*********************第2个学生**************************
学号:3,班级:1,性别:男,年龄21
*********************第3个学生**************************
学号:4,班级:1,性别:男,年龄21
*********************第4个学生**************************
学号:5,班级:1,性别:男,年龄21
*********************第5个学生**************************
学号:6,班级:1,性别:女,年龄21
*/