扫描并放入阵列

Question

我想扫描句子并计算有多少单词。然后将句子放入数组。并打印它。

它一直工作到 System.out.println（“단어개수 ： ” count）;但在那之后它不起作用。

导入java.util.扫描仪；公共类Midterm_HW00{

public static void main(String[] args) {
    
    System.out.println("Insert sentence: ");
    
    
    Scanner scanner = new Scanner(System.in);
    int count =1;
    
    String sentence = scanner.nextLine();   //문자열 읽기    
            
    for(int i = 0; i < sentence.length(); i++) {   
        if(sentence.charAt(i)==' ') {   //단어 개수를 띄어쓰기 개수로 계산
            count++;
            
        }
    }
    System.out.println("단어 개수: " + count);

    String[] wordArray = new String[30];   //배열 선언
    int word = wordArray.length;
    
    for(int j=0; j<word; j++){
        wordArray[j] = scanner.next();            

       System.out.println("" + wordArray[j]);

    
    
    scanner.close();
   }
}

}

Answer 1

您可以使用按空格分割的字符串来生成这样的数组string[]wordArray=sentence.split（“\\s”）

代码：

public static void main(String[] args) {
    // TODO Auto-generated method stub

    System.out.println("Insert sentence: ");
    
    
    Scanner scanner = new Scanner(System.in);
    int count =1;
    
    String sentence = scanner.nextLine();   //문자열 읽기    
            
    for(int i = 0; i < sentence.length(); i++) {   
        if(sentence.charAt(i)==' ') {   //단어 개수를 띄어쓰기 개수로 계산
            count++;
            
        }
    }
    System.out.println("단어 개수: " + count);

    String[] wordArray = sentence.split("\\s+");   //배열 선언
    
    
    for(int j=0; j<wordArray.length; j++){       

       System.out.println("" + wordArray[j]);

   }
}

Answer 2

Scanner scanner = new Scanner(System.in);
String sentence = scanner.nextLine();

String[] words = sentence.split("[ ]+");
System.out.println("단어 개수: " + words.length);

for(String word : words){
    System.out.println(word);
}

Answer 3

你可以通过使用简单的方法得到所有这些：

String[] array = yourString.split(" ");
int amountOfWords = array.length;