java - 从字符串数组中提取单词(Extracting words from a String array)

Question

I'm trying to extract a two worded string in the exact same way but all I'm getting is only the first word as the output.

(我试图以完全相同的方式提取两个单词的字符串，但是我得到的只是输出的第一个单词。)

public class name {
    public static void main(String[] args)throws IOException {
        InputStreamReader read = new InputStreamReader(System.in);
        BufferedReader in = new BufferedReader(read);
        String []arr = new String[10];
        String name, str = " ";
        int k = 0;
        System.out.println("Enter Name");
        name = in.readLine();
        for(int i = 0; i < name.length(); i++) {
            if(name.charAt(i) != ' ') {
                str = str + name.charAt(i);
            }
            else {
                arr[k++] = str;
                str = " ";
            }
        }
        for(int i = 0; i < k; i++)
        System.out.println(arr[i]);

    }
}

  ask by coolhack7 translate from so

Answer 1

I think the question is already answered.

(我认为这个问题已经回答。)

But instead of walking through the characters of the string it is better to use the standard Java library as follows:

(但是，与其遍历字符串的字符，不如使用标准的Java库，如下所示：)

name = in.readLine();
if (name != null && !"".equals(name)) {
    String[] arr = name.split("\s+");
    for (int i = 0; i < arr.length; i++)
        System.out.println(arr[i]);
}

The split() method does what you're trying to program yourself.

(split()方法可以完成您要编程的工作。)

The string \\s+ ist a regular expression which represents one or more space characters (space, newline, ...).

(字符串\\s+是一个正则表达式，代表一个或多个空格字符（空格，换行符，...）。)

You could also use " " instead, but in this case your input must contain only one space character.

(您也可以改用" " ，但是在这种情况下，您的输入必须仅包含一个空格字符。)

Example:

(例：)

System.out.println("Enter Name");

(System.out.println（“输入名称”）;)

Input:

(输入：)

firstname secondname         lastname

output:

(输出：)

firstname
secondname
lastname