java - 如何反转 Java String 的单词

Question

我试图编写一个程序来从扫描仪获取字符串输入，但我想分解输入的字符串并反转单词的顺序。这是我到目前为止所拥有的。

Scanner input = new Scanner(System.in);
System.out.println("Enter your string");
StringBuilder welcome = new StringBuilder(input.next());
int i;
for( i = 0; i < welcome.length(); i++ ){
    // Will recognize a space in words
    if(Character.isWhitespace(welcome.charAt(i))) {
        Character a = welcome.charAt(i);
    }   
}

我想要做的是在它识别出空格之后，捕获它之前的所有内容，依此类推每个空格，然后重新排列字符串。

Answer 1

提问后编辑。

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

public class Main {

   public static void main( String[] args ) {
      final String welcome = "How should we get words in string form a List?";
      final List< String > words = Arrays.asList( welcome.split( "\\s" ));
      Collections.reverse( words );
      final String rev = words.stream().collect( Collectors.joining( ", " ));
      System.out.println( "Your sentence, reversed: " + rev );
   }
}

执行:

Your sentence, reversed: List?, a, form, string, in, words, get, we, should, How