我完全迷失在这里做什么。如何使要处理的字符串不作为命令行参数输入, 而是作为从标准输入读取的一行文本,并提示带问号?
当前代码
import java.util。*;
公共类CountVowels {
public static void main (String[] args) {
if (args.length ==1) {
String str = args [0];
int ofVowels = 0;
for(int i=0;i <str.length();i++){
if((str.charAt(i) == 'a') ||
(str.charAt(i) == 'e') ||
(str.charAt(i) == 'i') ||
(str.charAt(i) == 'o') ||
(str.charAt(i) == 'u')) {
ofVowels ++;
}
}
System.out.println(" In The String "+str+", there are "+ofVowels+" vowels");
}
}
}
答案 0 :(得分:1)
首先,您需要import java.util.Scanner;
然后你去:
Scanner s = new Scanner(System.in); // create and attach the scanner
System.out.println("?");
String str = s.nextLine(); // gets what the user typed
修改:添加到您的代码中,这样就可以了:
Scanner s = new Scanner(System.in); // create and attach the scanner
System.out.println("?");
String str = s.nextLine(); // gets what the user typed
int ofVowels = 0;
for(int i=0;i <str.length();i++){
if((str.charAt(i) == 'a') ||
(str.charAt(i) == 'e') ||
(str.charAt(i) == 'i') ||
(str.charAt(i) == 'o') ||
(str.charAt(i) == 'u')) {
ofVowels ++;
}
}
System.out.println(" In The String "+str+", there are "+ofVowels+" vowels");