How Can I Decode Escaped Unicode Strings in Java?

Decoding Escaped Unicode Strings to Regular Letters

Encountering strings with escaped Unicode characters (uXXXX) can be problematic, especially when performing file searches where the encoded characters prevent locating files with accurate names.

To resolve this issue, Apache Commons Lang provides the convenient StringEscapeUtils.unescapeJava() method for decoding escaped Unicode sequences back to their corresponding letters.

Example

Consider the following escaped Unicode string:

"\u0048\u0065\u006C\u006C\u006F World"

Using StringEscapeUtils.unescapeJava(), we can decode it into the following regular Unicode string:

"Hello World"

Implementation

Here's how you can use StringEscapeUtils.unescapeJava():

import org.apache.commons.lang.StringEscapeUtils;

// Test the method
@Test
public void testUnescapeJava() {
    String sJava = "\u0048\u0065\u006C\u006C\u006F";
    System.out.println("StringEscapeUtils.unescapeJava(sJava):\n" + StringEscapeUtils.unescapeJava(sJava));
}

Output

When executing the above code, the output will be:

StringEscapeUtils.unescapeJava(sJava):
Hello

By leveraging StringEscapeUtils.unescapeJava(), you can easily convert escaped Unicode strings into their original letter forms, enabling accurate file searches and other operations that rely on properly decoded text data.

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