java如何使用void方法
我需要显示以下信息
Enter size of array: 3
Enter student name: jane doe
Enter student id number: 14234567
Enter student name: john doe
Enter student id number: 12345678
Enter student name: peter griffin
Enter student id number: 14238251
Array Contents
jane doe 14234567
john doe 12345678
peter griffin
14238251
我必须使用以下方法
询问用户希望数组的大小,然后创建类型为的数组 指定大小的学生
public static Student[] createArray()
通过要求用户输入每个对象的名称和ID号来填充数组 存储在数组中
public static void populateArray(Student[] array)
以显示数组的内容
public static void displayArray(Student[] array)
这就是我目前所拥有的
class Student {
//private instances
private String name = "unassigned";
private long idNumber = 0;
//Default constructor
public Student() {
name = "Not Given";
idNumber = 0;
}
//Constructs a new Student with passed name and age parameters.
public Student(String studentName, long studentIdNumber) {
name = studentName;
idNumber = studentIdNumber;
}
//Returns the name of this student.
public String getName( ) {
return name;
}
// Returns the idNumber of this person.
public long getIdNumber( ) {
return idNumber;
}
//Sets the name of this student.
public void setName(String studentName ) {
name = studentName;
}
//Sets the idNumber of this student.
public void setIdNumber(long studentIdNumber ) {
idNumber = studentIdNumber;
}
} // end class
及
import java.util.Scanner;
public class StudentTest {
static int array;
//create method createArray
public static Student[] createArray() {
Scanner int_input = new Scanner(System.in);
//user enters size of array
System.out.print("Enter Size of Array: ");
array = int_input.nextInt();
//create array
Student[] array = new Student[0];
return array;//return array
}//end method
//create method populateArray
public static void populateArray(Student[] array) {
try (Scanner string_input = new Scanner(System.in);
Scanner long_input = new Scanner(System.in);)
{
for (int i = 0; i < 3; i++) {
Student arrays = new Student();
//set name
System.out.println("Enter Student Name: ");
arrays.setName(string_input.nextLine());
//set ID number
System.out.println("Enter Student ID Number: ");
arrays.setIdNumber(long_input.nextLong());
System.out.println();
}//end for loop
}//end try loop
}//end method
//create method display Array
public static void displayArray(Student[] array){
System.out.println("Array Contents");
System.out.println();
}//end method
public static void main(String [] args){
//display createArray method
System.out.println(createArray());
//display populateArray method
System.out.println();
//display array contents
System.out.println();
}//end main method
}//end class
我的问题是如何获得populateArray方法,使我能够在其中输入数据,然后显示数据?并获取要显示的displayArray方法?我试过很多不同的方法,但我想不出来
# 1 楼答案
你必须根据你的逻辑解决一些问题。从
main
开始:在
createArray
中创建并返回大小正确的数组:在
populateArray
中,确保使用来自用户的数据修改传递的数组,即:最后,在
displayArray
中,只需迭代项目并以您喜欢的格式打印它们:当然,你不需要有三种不同的方法来实现这个琐碎的功能,但它应该可以工作