使用扫描器读取文本，存储在数组中，并为每个循环使用大写输出Java

Question

I have to write a program to read in 10 names from a user (keyboard scanner) and store them in an array. Then loop through the array and display the names in upper case (using a for each loop to display them all). How do I do it? At the moment I have:

import java.util.Scanner;

public class Names
{
    public static void main(String[] args) throws Exception
    {
        Scanner nameScan = new Scanner(System.in);
        String[] names = new String[10];
        String[] namesUpper = new String[10];

        System.out.print("Enter a name : ");
        names=nameScan.next(); 


        namesUpper=names.toUpperCase();
        System.out.println("Names in upper case: "+namesUpper);
    } 
}

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So far I have this, but still not working. Where am I going wrong please? Thanks

import java.util.Scanner;

    public class NamesReAD
    {
        public static void main(String[] args) throws Exception
        {
            Scanner nameScan = new Scanner(System.in);
            String[] names = new String[10];


            for (int i = 0 ; i < names.length ; i++) {
                System.out.print("Enter a name: ");
                names[i] = nameScan.nextLine().toUpperCase();
            }
            nameScan.close();
            System.out.println("Here is name"+names);
        }
    }

Answer 1

for (int i = 0 ; i < names.length ; i++) {
    System.out.print("Enter a name: ");
    names[i] = nameScan.nextLine().toUpperCase();
}

This section would work except the .toUpperCase(); It will not change the names to uppercase.

Answer 2

You'll need a for -loop to traverse the array(s) and put the appropriate data at each index. For instance,

for (int i = 0 ; i < names.length ; i++) {
    System.out.print("Enter a name: ");
    names[i] = nameScan.nextLine();
}

This will ask the user for a name 10 times, and will fill the names array with whatever the user inputs. Now, you don't really have to create a second array ( namesUpper ); you can just loop over names again and print names[i].toUpperCase() (or use a for -each loop as you suggested, but the idea is the same).

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As you have it now, these two lines won't compile:

names = nameScan.next(); 
namesUpper = names.toUpperCase();

since 1) names is an array and nameScan.next() returns a string and 2) names has no method called toUpperCase .

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EDIT : Or, you could just store the names as upper-case when you add them to the names array:

for (int i = 0 ; i < names.length ; i++) {
    System.out.print("Enter a name: ");
    names[i] = nameScan.nextLine().toUpperCase();
}

Then you wouldn't have to worry about anything when you print the contents of the array.