java中的foreach循环: for(typename varname:arrayname)

package s;
import java.util.Scanner;
public class C2 {
public static void main(String []args)
{
Scanner scn=new Scanner(System.in);
      int n;
      System.out.print("创建多少个元素的字符串数组:");
      n=scn.nextInt();
String []str=new String[n];
int i=0;

while(i<n)
{
    str[i++]=scn.next();
}
for(String s:str)
   // System.out.print(s+"n");
   System.out.print(s.toUpperCase()+"n");
}
}