我真的看不出有什么问题。这是我得到的错误:
`$javac Palindrome.java $java -Xmx128M -Xms16M Palindrome Enter your word Exception in thread "main" java.util.NoSuchElementException at java.util.Scanner.throwFor(Scanner.java:862) at java.util.Scanner.next(Scanner.java:1485) at java.util.Scanner.nextInt(Scanner.java:2117) at java.util.Scanner.nextInt(Scanner.java:2076) at Palindrome.main(Palindrome.java:28)`
代码如下:
import java.io.*;
import java.util.Scanner;
import java.util.*;
import java.lang.StringBuffer;
// Java program to illustrate checking of a string
// if its palindrome or not using reverse function
public class Palindrome
{
public static void checkPalindrome(String s)
{
// reverse the given String
String reverse = new StringBuffer(s).reverse().toString();
// check whether the string is palindrome or not
if (s.equals(reverse))
System.out.println("Yes");
else
System.out.println("No");
}
public static void main (String[] args) throws java.lang.Exception
{
Scanner scanner = new Scanner(System.in);
System.out.println("Enter your word");
String output = scanner.next();
}
}
我请求输入单词,然后获取输入以检查它是否是回文
发布于 2019-02-15 05:19:55
在联机编辑器中,此问题发生在输入中。在获取输入之前尝试编写:
if(sc.hasNext())
代码可以写成:
public class Palindrome
{
public static void checkPalindrome(String s)
{
// reverse the given String
String reverse = new StringBuffer(s).reverse().toString();
// check whether the string is palindrome or not
if (s.equals(reverse))
System.out.println("Yes");
else
System.out.println("No");
}
public static void main (String[] args) throws java.lang.Exception
Scanner scanner = new Scanner(System.in);
System.out.println("Enter your word");
if(sc.hasNext())
String output = scanner.next();
}
}
发布于 2018-06-08 06:30:50
我不能发表评论,因为我没有足够的声誉。但是解决方案是你没有输入源。
堆栈跟踪引用的行是:
private void throwFor() {
skipped = false;
//since you are using an online tool, you dont actually have an
//input unless you click on the stdin tab and provide an input.
if ( (sourceClosed) && (position == buf.limit()))
throw new NoSuchElementException();
else
throw new InputMismatchException();
}
只需按下stdin选项卡并在其中键入一些内容,然后在您的在线ide中执行代码,您应该不会再收到异常。但您应该提供某种类型的输出,以反映您的结果,无论它是一个回文:)。
https://stackoverflow.com/questions/50748075
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