[英]Inserting values into two array using scanner class in java
import java.util.Scanner;
public class Demo3
{
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
System.out.print("Enter how many friends: ");
int numOfFriends = Integer.parseInt(scan.nextLine());
String arrayOfNames[] = new String[numOfFriends];
long income[] = new long[numOfFriends];
for (int i = 0; i < arrayOfNames.length; i++)
{
System.out.print("\nEnter the name of friend " + (i+1) + " : ");
arrayOfNames[i] = scan.nextLine();
for(int j = 0; j<arrayOfNames.length;j++)
{
System.out.print("\nEnter the income of friend " + (j+1) + " : ");
income[j] = scan.nextLong();
}
}
}
}
This is my code, I want to take input name from user then the income of that person then again the name of another person The above code is not arranged properly, I think there's problem in the for loop the sample output should be like: 这是我的代码,我想从用户那里获取输入名称,然后从该人的收入中获取,然后再获取另一个人的名称。上面的代码未正确排列,我认为for循环中的问题示例输出应为:
Enter how many friends: 2
Enter name of friend 1 : #############
Enter income of friend 1 : ##############
Enter name of friend 2 : #############
Enter income of friend 2 : ##############
You should take inner for loop out. 您应该将内部for循环取出。
import java.util.Scanner;
public class Demo3
{
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
System.out.print("Enter how many friends: ");
int numOfFriends = Integer.parseInt(scan.nextLine());
String arrayOfNames[] = new String[numOfFriends];
long income[] = new long[numOfFriends];
for (int i = 0; i < arrayOfNames.length; i++)
{
System.out.print("\nEnter the name of friend " + (i+1) + " : ");
arrayOfNames[i] = scan.nextLine();
}
for(int j = 0; j<arrayOfNames.length;j++)
{
System.out.print("\nEnter the income of friend " + (j+1) + " : ");
income[j] = scan.nextLong();
}
scan.close();
}
}
Besides, if you want to enter them in order, you should just use one for loop 此外,如果要按顺序输入它们,则只需使用一个for循环
import java.util.Scanner;
public class Demo3
{
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
System.out.print("Enter how many friends: ");
int numOfFriends = Integer.parseInt(scan.nextLine());
String arrayOfNames[] = new String[numOfFriends];
long income[] = new long[numOfFriends];
for (int i = 0; i < arrayOfNames.length; i++)
{
System.out.print("\nEnter the name of friend " + (i+1) + " : ");
arrayOfNames[i] = scan.nextLine();
System.out.print("\nEnter the income of friend " + (i+1) + " : ");
income[i] = scan.nextLong();
scan.nextLine();
}
scan.close();
}
}
As a side note, don't forget to close()
scanner after its task is completed. 附带说明,不要忘记在完成任务后close()
扫描器。
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