java - How to convert a string with Unicode encoding to a string of letters

Question

I have a string with escaped Unicode characters, uXXXX, and I want to convert it to regular Unicode letters. For example:

"u0048u0065u006Cu006Cu006F World"

should become

"Hello World"

I know that when I print the first string it already shows Hello world. My problem is I read file names from a file, and then I search for them. The files names in the file are escaped with Unicode encoding, and when I search for the files, I can't find them, since it searches for a file with uXXXX in its name.

Answer 1

The Apache Commons Lang StringEscapeUtils.unescapeJava() can decode it properly.

import org.apache.commons.lang.StringEscapeUtils;

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


 output:
 StringEscapeUtils.unescapeJava(sJava):
 Hello