Java中读取用户输入和写入文件时的继承问题
这是基类员工代码
public class Employee {
private String name;
private int age;
private String address;
private String EmpId;
private double salary;
public Employee(String name,int age,String address,String EmpId,double salary) {
this.name=name;
this.age=age;
this.address=address;
this.EmpId=EmpId;
this.salary=salary;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getEmpId() {
return EmpId;
}
public void setEmpId(String empId) {
EmpId = empId;
}
public double getSalary() {
return salary;
}
public void setSalary(double salary) {
this.salary = salary;
}
}
这里，软件员工正在扩展这个基类
public class SoftwareEmployee extends Employee{
private String skillSet;
public SoftwareEmployee(String name,int age,String address,String EmpId,double salary,String
skillSet) {
super(name,age,address,EmpId,salary);
this.skillSet=skillSet;
}
public String getSkillSet() {
return skillSet;
}
public void setSkillSet(String skillSet) {
this.skillSet = skillSet;
}
}
此外，Finance Employee正在扩展基类 代码是：
public class FinanceEmployee extends Employee {
private String Degree;
public FinanceEmployee(String name,int age,String address,String EmpId,double salary,String Degree) {
super(name,age,address,EmpId,salary);
this.Degree=Degree;
}
public String getDegree() {
return Degree;
}
public void setDegree(String degree) {
Degree = degree;
}
}
在这里，它无法写入外部文件。此外，console并没有等待我先插入姓名，然后再插入年龄。它只是同时打印姓名和年龄，然后再同时打印两件事。我对这个很陌生
这是我的主课
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Scanner;
public class Main {
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
//File file = new File("C:\\Users\\AK078479\\Documents\\newfile.txt");
FileWriter fWriter = new FileWriter("C:\\Users\\AK078479\\Documents\\newfile.txt");
//BufferedWriter writer = null;
Employee employee=new Employee(null, 0, null, null, 0);
SoftwareEmployee sftemp=new SoftwareEmployee(null, 0, null, null, 0, null);
FinanceEmployee fncemp=new FinanceEmployee(null, 0, null, null, 0, null);
System.out.println("You are "+"\n"+"1.Reviewer"+"\n"+"2.Data Entry Operator");
int choice = sc.nextInt();
switch(choice) {
case(1):
System.out.println("Do you want to see a"+ "\n" + "1.Particular record"+"\n"+"2.All
records");
int value=sc.nextInt();
switch(value) {
case(1):
}
break;
case(2):
System.out.println("Employee is a "+"\n"+"1.Software Employee"+"\n"+"2.Finance
Employee");
int num =sc.nextInt();
switch(num) {
case(2):
try {
//String s="Finance Employee";
//writer.write(s);
//writer.newLine();
int n=2;
while(n>0) {
//writer = new BufferedWriter(fWriter);
System.out.println("Enter name");
String text = sc.next();
fncemp.setName(text);
fWriter.write(text);
//fWriter.newLine();
System.out.println("Enter age");
int age=sc.nextInt();
fncemp.setAge(age);
fWriter.write(age);
//writer.newLine();
System.out.println("Enter address");
String add = sc.nextLine();
fncemp.setAddress(add);
fWriter.write(add);
//fwriter.newLine();
System.out.println("Enter EmpId");
String emplId = sc.nextLine();
fncemp.setEmpId(emplId);
fWriter.write(emplId);
//writer.newLine();
System.out.println("Enter salary");
double sal = sc.nextDouble();
fncemp.setSalary(sal);
fWriter.write((int) sal);
//writer.newLine();
System.out.println("Enter degree");
String degree = sc.nextLine();
fncemp.setDegree(degree);
fWriter.write(degree);
//writer.newLine();
n--;
}
} catch (Exception e) {
System.out.println("Error!");
}
break;
case(1):
try {
//String st="Software Employee";
//writer.write(st);
// writer.newLine();
int n=2;
while(n>0) {
//fWriter = new FileWriter(file);
//writer = new BufferedWriter(fWriter);
System.out.println("Enter name");
//String text = sc.nextLine();
sftemp.setName(sc.nextLine());
fWriter.write(sftemp.getName());
//fWriter.newLine();
System.out.println("Enter age");
int age=sc.nextInt();
sftemp.setAge(age);
fWriter.write(age);
//fWriter.newLine();
System.out.println("Enter address");
String add = sc.nextLine();
sftemp.setAddress(add);
fWriter.write(add);
//writer.newLine();
System.out.println("Enter EmpId");
String emplId = sc.nextLine();
sftemp.setEmpId(emplId);
fWriter.write(emplId);
//writer.newLine();
System.out.println("Enter salary");
double sal = sc.nextDouble();
sftemp.setSalary(sal);
fWriter.write((int) sal);
//writer.newLine();
System.out.println("Enter skill Set");
String skill = sc.nextLine();
sftemp.setSkillSet(skill);
fWriter.write(skill);
//writer.newLine();
n--;
}
} catch (Exception e) {
System.out.println("Error!");
}
break;
default:
System.out.println("Try again");
}
break;
default:
System.out.println("Try again");
}
}
}
# 1 楼答案
在使用scanner方法
nextInt()之后，应该再次调用nextLine()，然后才能读取字符串。原因是，在调用nextInt之后，跟踪输入流中您的位置的扫描仪内部光标会经过整数，但会在新行字符的正前方停止。当你调用nextLine()时，扫描器只会返回空字符串并移动到下一行，因此只有下一个nextLine()调用会返回你在数字后面输入的非空字符串。因此，例如：您需要添加：