Java 从用户输入读取名称并将其存储在数组中
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Reading and storing names in an array from user input
提问by Brody
I'm currently in the midst of creating a program that takes in 10 names from user input, stores them in an array and then prints them out in upper case. I know there's been similar threads/questions asked but none of them really helped me. As per, any help would be greatly appreciated.
我目前正在创建一个程序，该程序从用户输入中获取 10 个名称，将它们存储在一个数组中，然后将它们以大写形式打印出来。我知道有人问过类似的主题/问题，但没有一个真正对我有帮助。按照，任何帮助将不胜感激。
My code:
我的代码：
import java.util.Scanner;
public class ReadAndStoreNames {
public static void main(String[] args) throws Exception {
Scanner scan = new Scanner(System.in);
//take 10 string values from user
System.out.println("Enter 10 names: ");
String n = scan.nextLine();
String [] names = {n};
//store the names in an array
for (int i = 0; i < 10; i++){
names[i] = scan.nextLine();
}
//sequentially print the names and upperCase them
for (String i : names){
System.out.println(i.toUpperCase());
}
scan.close();
}
}
The current error I'm getting is this (after only 3 inputs I may add):
我得到的当前错误是这样的（仅在我可以添加 3 个输入之后）：
Enter 10 names:
Tom
Steve
Phil
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
at ReadAndStoreNames.main(ReadAndStoreNames.java:22)
采纳答案by Roel Strolenberg
Your problem is here:
你的问题在这里：
String [] names = {n};
The size of namesis now 1, with the value 10.
What you want is:
的大小names现在是 1，值为 10。你想要的是：
String [] names = new String[n];
The latter is the correct syntax for specifying sizeof arrays.
后者是指定size数组的正确语法。
EDIT:
编辑：
It seems like you want to read nusing the scanner. nextLinecan be anything, so not just an integer. I would change the code to this:
您似乎想n使用扫描仪阅读。nextLine可以是任何东西，所以不仅仅是一个整数。我会把代码改成这样：
import java.util.Scanner;
public class ReadAndStoreNames {
public static void main(String[] args) throws Exception {
Scanner scan = new Scanner(System.in);
System.out.println("How many names would you like to enter?")
int n = scan.nextInt(); //Ensures you take an integer
System.out.println("Enter the " + n + " names: ");
String [] names = new String[n];
//store the names in an array
for (int i = 0; i < names.length; i++){
names[i] = scan.nextLine();
}
//sequentially print the names and upperCase them
for (String i : names){
System.out.println(i.toUpperCase());
}
scan.close();
}
}
