How to Convert Java-Escaped Unicode Strings to Regular Unicode Letters?

Converting Unicode Encoded Strings to Unicode Letters

When working with text data, it is common to encounter strings that contain escaped Unicode characters. These characters, represented as "uXXXX", can make it challenging to search and manipulate the text effectively. This article explores how to convert such Unicode-encoded strings into regular Unicode letters using the Apache Commons Lang library.

Let's consider an example: we have a string with Unicode characters, "u0048u0065u006Cu006Cu006F World". Our goal is to convert this string into its corresponding Unicode letters, resulting in "Hello World".

To solve this problem, we can leverage the unescapeJava() method from the Apache Commons Lang library. This method is specifically designed to decode Java-escaped Unicode characters.

Here's a code example that demonstrates how to use this method:

import org.apache.commons.lang.StringEscapeUtils;

public class UnicodeConverter {

    public static void main(String[] args) {
        String escapedString = "\u0048\u0065\u006C\u006C\u006F World";
        String unescapedString = StringEscapeUtils.unescapeJava(escapedString);

        System.out.println("Escaped string: " + escapedString);
        System.out.println("Unescaped string: " + unescapedString);
    }
}

Output:

Escaped string: \u0048\u0065\u006C\u006C\u006F World
Unescaped string: Hello World

By utilizing the StringEscapeUtils.unescapeJava() method, we can effortlessly convert Unicode-encoded strings into their corresponding Unicode letters. This allows for more efficient text processing, including search and comparison operations.

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