读取字符并检查它们是否是数字

发布于 2024-11-09 15:15:12 字数 3259 浏览 0 评论 0原文

我正在尝试获取一种方法来检查符号 & 之后是否有字符。是数字或字母;如果是数字,则将其转换为二进制;如果它是一个字母,则设置为 16,并且如果使用不同的单词则加 1。问题是,出于某种原因,这对我不起作用。有什么建议吗?

try {
       ReadFile files = new ReadFile(file.getPath());
       String[] anyLines = files.OpenFile();

       int i;

       for (i=0; i<anyLines.length; i++) {
           String input = anyLines[i];
           String[] lines = input.split("\n");

           int wordValue = 16;

           Map<String, Integer> wordValueMap = new HashMap<String, Integer>();

           for (String line : lines) {
               // if line doesn't begin with &, then ignore it
               if (!line.startsWith("&")) {
                   continue;
               }

               // remove &
               line = line.substring(1);

               Integer binaryValue = null;

               if (line.matches("\\d+")) {
                   binaryValue = Integer.toBinaryString(131072 +
                              Integer.parseInt(anyLines[i])).substring(2,18);
               }
               else if (line.matches("\\w+")) {
                   binaryValue = wordValueMap.get(line);

                   if (binaryValue == null) {
                       binaryValue = wordValue;
                       wordValueMap.put(line, binaryValue);
                       wordValue++;
                   }
               }
           }
       }

输入:

&4
...
&hello
...
&ok

输出:

(5 translated into binary) : 0000000000000100
...
(16 translated into binary)
...
(17 translated into binary, or 16+1)

这是你的方法的输出:

101
1001100
1001100
1001100
1001100
1001100
1001100
1001100
&5
1110110000010000 
&hello
1110001100001000 
&goodbye
1110101010001000 
(NEXT)
&goodbye
1111000010001000 
&hello
1110001110001000 
&BILL
1110001100000110 
&NEXT
1110101010000111 
(BILL)
&BILL
1110101010000111 

这是我正在阅读和循环的原始文本(anyLines[i] 没有任何修改):

&5
var1 
&hello
var2 
&goodbye
var2 
(NEXT)
&goodbye
var3 
&hello
var4 
&BILL
var5 
&NEXT
var6 
(BILL)
&BILL
var5 

var 只是一个具有值的变量。我已经处理好了这些。


这是我的尝试:

String input = "This is a test line\n"
           + "&hello\n"
           + "&4\n"
           + "&32";

String[] lines = input.split("\n");
int wordValue = 26;

Map<String, Integer> wordValueMap = new HashMap<String, Integer>();

for (String currentLine : lines)
{
if (!currentLine.startsWith("&"))
{
    continue;
}

currentLine = currentLine.substring(1);
Integer value;

if (currentLine.matches("\\d+"))
{
    value = Integer.parseInt(currentLine);
}
else if (currentLine.matches("\\w+"))
{
    value = wordValueMap.get(currentLine);

    if(value == null)
    {
        int binaryValue = wordValue++;
        wordValueMap.replace(currentLine, binaryValue);
        /*
         * This is just there to ensure that the print statement below doesn't have a 
         * null value.
         */
        value = binaryValue;
    }
}
else
{
    System.out.println("Invalid input");
    break;
}

System.out.println(Integer.toBinaryString(value));
}

I am trying to get a method that checks if character after the symbol & is a number or a letter; if a number, it is translated into binary; and if it is a letter, it is set to 16 and is incremented by 1 if a different word is being used. The trouble is, this doesn't work for me, for some reason. Any suggestions?

try {
       ReadFile files = new ReadFile(file.getPath());
       String[] anyLines = files.OpenFile();

       int i;

       for (i=0; i<anyLines.length; i++) {
           String input = anyLines[i];
           String[] lines = input.split("\n");

           int wordValue = 16;

           Map<String, Integer> wordValueMap = new HashMap<String, Integer>();

           for (String line : lines) {
               // if line doesn't begin with &, then ignore it
               if (!line.startsWith("&")) {
                   continue;
               }

               // remove &
               line = line.substring(1);

               Integer binaryValue = null;

               if (line.matches("\\d+")) {
                   binaryValue = Integer.toBinaryString(131072 +
                              Integer.parseInt(anyLines[i])).substring(2,18);
               }
               else if (line.matches("\\w+")) {
                   binaryValue = wordValueMap.get(line);

                   if (binaryValue == null) {
                       binaryValue = wordValue;
                       wordValueMap.put(line, binaryValue);
                       wordValue++;
                   }
               }
           }
       }

INPUT:

&4
...
&hello
...
&ok

OUTPUT:

(5 translated into binary) : 0000000000000100
...
(16 translated into binary)
...
(17 translated into binary, or 16+1)

Here's the output of your method:

101
1001100
1001100
1001100
1001100
1001100
1001100
1001100
&5
1110110000010000 
&hello
1110001100001000 
&goodbye
1110101010001000 
(NEXT)
&goodbye
1111000010001000 
&hello
1110001110001000 
&BILL
1110001100000110 
&NEXT
1110101010000111 
(BILL)
&BILL
1110101010000111 

And here's the original text that i'm reading and looping through (anyLines[i] without any modifications):

&5
var1 
&hello
var2 
&goodbye
var2 
(NEXT)
&goodbye
var3 
&hello
var4 
&BILL
var5 
&NEXT
var6 
(BILL)
&BILL
var5 

var is just a variable that has a value. I already took care of those.


Here's my attempt:

String input = "This is a test line\n"
           + "&hello\n"
           + "&4\n"
           + "&32";

String[] lines = input.split("\n");
int wordValue = 26;

Map<String, Integer> wordValueMap = new HashMap<String, Integer>();

for (String currentLine : lines)
{
if (!currentLine.startsWith("&"))
{
    continue;
}

currentLine = currentLine.substring(1);
Integer value;

if (currentLine.matches("\\d+"))
{
    value = Integer.parseInt(currentLine);
}
else if (currentLine.matches("\\w+"))
{
    value = wordValueMap.get(currentLine);

    if(value == null)
    {
        int binaryValue = wordValue++;
        wordValueMap.replace(currentLine, binaryValue);
        /*
         * This is just there to ensure that the print statement below doesn't have a 
         * null value.
         */
        value = binaryValue;
    }
}
else
{
    System.out.println("Invalid input");
    break;
}

System.out.println(Integer.toBinaryString(value));
}

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评论(1

楠木可依 2024-11-16 15:15:12

您的代码存在很多问题。
首先,您必须解析调用 toBinaryString() 之后获得的值。

binaryValue = Integer.parseInt(Integer.toBinaryString(131072 +
                          Integer.parseInt(anyLines[i])).substring(2,18));

在该代码中使用 anyLines[i] 作为 parseInt() 函数的参数也是不正确的。从我看到的代码来看,anyLines[i] 是一个包含 newLines 和其他内容的字符串,显然无法将其解析为整数。

下面的代码似乎有效。我更改了 HashMap 的存储方式,以便它存储常规整数,而不是尝试将二进制表示形式存储为整数值。

String input = "This is a test line\n"
               + "&hello\n"
               + "&4\n"
               + "&32";

String[] lines = input.split("\n");
int wordValue = 26;

Map<String, Integer> wordValueMap = new HashMap<String, Integer>();

for (String currentLine : lines)
{
    if (!currentLine.startsWith("&"))
    {
        continue;
    }

    currentLine = currentLine.substring(1);
    Integer value;

    if (currentLine.matches("\\d+"))
    {
        value = Integer.parseInt(currentLine);
    }
    else if (currentLine.matches("\\w+"))
    {
        value = wordValueMap.get(currentLine);

        if(value == null)
        {
            int binaryValue = wordValue++;
            wordValueMap.put(currentLine, binaryValue);
            /*
             * This is just there to ensure that the print statement below doesn't have a 
             * null value.
             */
            value = binaryValue;
        }
    }
    else
    {
        System.out.println("Invalid input");
        break;
    }

    System.out.println(Integer.toBinaryString(value));
}

作为旁注,我希望您知道,如果数字后跟单词(例如句子),则此操作将会失败。但如果你的输入永远不会有任何这些,那就不是问题。

There are numerous problems with your code.
To begin with, you'll have to parse the value you get after the toBinaryString() call.

binaryValue = Integer.parseInt(Integer.toBinaryString(131072 +
                          Integer.parseInt(anyLines[i])).substring(2,18));

The usage of anyLines[i] as an argument to the parseInt() function in that code is also incorrect. From what I see of your code, anyLines[i] is a string with newLines and other things in it, which obviously cannot be parsed into an integer.

The code below seems to work. I've changed the storage of the HashMap so that it stores regular integers, instead of attempting to store a binary representation as an integer value.

String input = "This is a test line\n"
               + "&hello\n"
               + "&4\n"
               + "&32";

String[] lines = input.split("\n");
int wordValue = 26;

Map<String, Integer> wordValueMap = new HashMap<String, Integer>();

for (String currentLine : lines)
{
    if (!currentLine.startsWith("&"))
    {
        continue;
    }

    currentLine = currentLine.substring(1);
    Integer value;

    if (currentLine.matches("\\d+"))
    {
        value = Integer.parseInt(currentLine);
    }
    else if (currentLine.matches("\\w+"))
    {
        value = wordValueMap.get(currentLine);

        if(value == null)
        {
            int binaryValue = wordValue++;
            wordValueMap.put(currentLine, binaryValue);
            /*
             * This is just there to ensure that the print statement below doesn't have a 
             * null value.
             */
            value = binaryValue;
        }
    }
    else
    {
        System.out.println("Invalid input");
        break;
    }

    System.out.println(Integer.toBinaryString(value));
}

As a side note, I hope you know that this will fail in the event of a number followed by a words, like sentences. But if your input will never have any of that, it's a non-issue.

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