Question

当我从键盘向令牌生成器输入一行时，它没有问题。然而，我试图通过文件行输入我的输入，文件行的名称在两个单词之间有一个空格。那是我收到NoExplolementException错误的时候。我不确定是否需要关闭文件？但是该文件具有更多需要读取的信息。感谢您抽出宝贵时间阅读我的问题：）

这是代码：

System.out.println("Enter your first and last name");
line = sc.nextLine();
System.out.println(line);
StringTokenizer lineTok = new StringTokenizer(line);
first = (String) lineTok.nextToken();
last = (String) lineTok.nextToken();

Answer 1

对我来说很好。

package tryouts;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Scanner;
import java.util.StringTokenizer;

public class StringTokenizerTest {
    public static void main(String[] args) throws FileNotFoundException {
        Scanner sc = new Scanner(new FileInputStream("/usr/projects/tryouts/src/tryouts/test.txt"));
        String line = sc.nextLine();
        System.out.println(line);
        StringTokenizer lineTok = new StringTokenizer(line);
        String first = (String) lineTok.nextToken();
        System.out.println(first);
        String last = (String) lineTok.nextToken();
        System.out.println(last);
        sc.close();
    }
}

在文件夹“ / usr / projects / tryouts / src / tryouts /”中创建一个名为“ test.txt”的文件，其单行内容为“ first second，third，fourth”，并打印第一和第二个。

Answer 2

下面的代码将打印出该行中的所有单词。

package tryouts;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Scanner;
import java.util.StringTokenizer;

public class StringTokenizerTest {
    public static void main(String[] args) throws FileNotFoundException {
        Scanner sc = new Scanner(new FileInputStream(
                "/usr/projects/tryouts/src/tryouts/test.txt"));
        String line = sc.nextLine();
        System.out.println(line);
        StringTokenizer lineTok = new StringTokenizer(line);
        while (lineTok.hasMoreTokens()) {
            System.out.println(lineTok.nextToken());
        }
        sc.close();
    }
}

StringTokenizer错误：标记化的行结束后出现NoExplorationException

2 个答案: