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Escaping quotes in Java

September 11th, 2008 No comments

Here is a simple tip to replace a quote with a backslash and a quote :
‘ ==> \’

public static String echappeApostrophe(String s) {
String temp;
temp = s.replaceAll(“‘”,”\\\\'”);
return temp;
}

I needed 4 backslashes

To better understand what is happening here, i printed out a few values :

String a = “\'”;
String b = “\\'”;
String c = “\\\'”;
String d = “\\\\'”;

System.out.println(a);
System.out.println(b);
System.out.println(c);
System.out.println(d);

output :

\’
\’
\\’

This is useful if for instance you need to pass, from a Java program, a string with a quote inside as a parameter to a dynamically generated
JavaScript function.

Else you get a Javascript error because the quote is not escaped.

More info here :

http://java.developpez.com/faq/java/?page=langage_chaine#LANGAGE_STRING_antislash

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Hug a developer today :)

September 1st, 2008 No comments
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