Question

java编程题从键盘输入一段英文，统计这段文字中单词的个数，并输出其中由四个字母组成的单词以5个一行输

Answer 1

import java.util.Scanner;

public class SplitWords {

public static void main(String[] args) {

System.out.println("Please input some english words, separate with ',' or SPACE ");

Scanner scanner = new Scanner(System.in);

String input = scanner.nextLine();

String[] words = input.replace(',', ' ').replace('.', ' ').split("\\s+");

System.out.println("Total " + words.length + " separate word in " + input);

System.out.println("Words with 4 characters are as follows: ");

int count = 0;
for(String str: words){

if(count == 5){
System.out.println();
count = 0;
}

if(str.length() == 4){
System.out.print(str + "\t");
count++;
}

}

}

}
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Please input some english words, separate with ',' or SPACE
Today is Christmas Day, we people in china don't celebrate it. I like china very much.
Total 16 separate word in Today is Christmas Day, we people in china don't celebrate it. I like china very much.
Words with 4 characters are as follows:
like very much

Answer 2

scanner类JavaAPI 没事多看看啊。