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

java unicode encoding
SharonBL picture SharonBL · Jun 21, 2012 · Viewed 240.6k times · Source

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

"\u0048\u0065\u006C\u006C\u006F 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

Tony picture Tony · Jan 16, 2013

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):\n" + StringEscapeUtils.unescapeJava(sJava));
}


 output:
 StringEscapeUtils.unescapeJava(sJava):
 Hello

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