消除"\ u3000"Java中的错误 [英] Eliminate the "\u3000" error in java

问题描述

当我尝试编译Java文件时，编译器会说非法字符\ u3000"，

When I try to compile a java file, the compiler said "illegal character \u3000",

搜索后，我发现它是 中日韩统一表意文字 中文韩文和日文的SPACE.我决定不编写手动删除特殊Java空格的代码，而是决定编写一个简单的搜索和删除Java文件以消除它.

after searching, I find it is CJK Unified Ideographs Chinese Korean and Japanese's SPACE. Instead of deleting the special SPACE manually, I decide to code a simple search-and-deleting java file to eliminate it.

但是它没有指出索引错误.那么如何编写代码来消除这种特殊的SPACE

However It doesnot point out the index error. So how to write a code to eliminate this special SPACE

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.File;
import java.io.IOException;
import java.util.*;
public class BufferReadAFile {
    public static void main(String[] args) {

        //BufferedReader br = null;
        String sCurrentLine;
        String message = "";
        try {

            /*br = new BufferedReader(new FileReader("/Users/apple/Test/Instance1.java"));

            while ((sCurrentLine = br.readLine()) != null) {
                message += sCurrentLine;
            }
            */
            String content = new Scanner(new File("/Users/apple/Coding/Instance1.java")).useDelimiter("\\Z").next();
            //System.out.println(content);
            searchSubString(content.toCharArray(),"\\u3000".toCharArray());

        } catch (IOException e) {
            e.printStackTrace();
        } 

    }


    public static void searchSubString(char[] text, char[] ptrn) {
        int i = 0, j = 0;
        // pattern and text lengths
        int ptrnLen = ptrn.length;
        int txtLen = text.length;

        // initialize new array and preprocess the pattern
        int[] b = preProcessPattern(ptrn);

        while (i < txtLen) {
            while (j >= 0 && text[i] != ptrn[j]) {
                j = b[j];
            }
            i++;
            j++;

            // a match is found
            if (j == ptrnLen) {
                System.out.println("found substring at index:" + (i - ptrnLen));
                j = b[j];
            }
        }
    }


    public static int[] preProcessPattern(char[] ptrn) {
        int i = 0, j = -1;
        int ptrnLen = ptrn.length;
        int[] b = new int[ptrnLen + 1];

        b[i] = j;
        while (i < ptrnLen) {            
                while (j >= 0 && ptrn[i] != ptrn[j]) {
                // if there is mismatch consider the next widest border
                // The borders to be examined are obtained in decreasing order from 
                //  the values b[i], b[b[i]] etc.
                j = b[j];
            }
            i++;
            j++;
            b[i] = j;
        }
    return b;
    }


}

推荐答案

我不认为"\\ u3000" 是您想要的.您可以打印出字符串并自己查看内容.您应该改用"\ u3000" .请注意单反斜杠.

I don't think "\\u3000" is what you want. You can print out the string and see the content yourself. You should use "\u3000" instead. Note the single back slash.

System.out.println("\\u3000"); // This prints out \u3000
System.out.println("\u3000");  // This prints out the CJK space

或者，您可以直接在 CheckEmpty 类中的 if 检查中直接使用实际的CJK空格字符.

Alternatively, you could just use the actual CJK space character directly as in one of the if checks in your CheckEmpty class.

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