src/main/java/org/jfree/graphics2d/svg/SVGUtils.java
public static String escapeForXML(String source) {
        Args.nullNotPermitted(source, "source");
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < source.length(); i++) {
            char c = source.charAt(i);
            switch (c) {
                case '<' : {
                    sb.append("&lt;");
                    break;
                } 
                case '>' : {
                    sb.append("&gt;");
                    break;
                } 
                case '&' : {
                    String next = source.substring(i, Math.min(i + 6, 
                            source.length()));
                    if (next.startsWith("&lt;") || next.startsWith("&gt;") 
                            || next.startsWith("&amp;") 
                            || next.startsWith("&apos;")
                            || next.startsWith("&quot;")) {
                        sb.append(c); 
                    } else {
                        sb.append("&amp;");
                    }
                    break;
                } 
                case '\'' : {
                    sb.append("&apos;");
                    break;
                } 
                case '\"' : {
                    sb.append("&quot;");
                    break;
                } 
                default : sb.append(c);
            }
        }
        return sb.toString();
    }
public static String escapeForXML(String source) {
        Args.nullNotPermitted(source, "source");
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < source.length(); i++) {
            char c = source.charAt(i);
            switch (c) {
                case '<' : {
                    sb.append("&lt;");
                    break;
                } 
                case '>' : {
                    sb.append("&gt;");
                    break;
                } 
                case '&' : {
                    String next = source.substring(i, Math.min(i + 6, 
                            source.length()));
                    if (next.startsWith("&lt;") || next.startsWith("&gt;") 
                            || next.startsWith("&amp;") 
                            || next.startsWith("&apos;")
                            || next.startsWith("&quot;")) {
                        sb.append(c); 
                    } else {
                        sb.append("&amp;");
                    }
                    break;
                } 
                case '\'' : {
                    sb.append("&apos;");
                    break;
                } 
                case '\"' : {
                    sb.append("&quot;");
                    break;
                } 
                default : sb.append(c);
            }
        }
        return sb.toString();
    }
public static String escapeForXML ( String source ) { Args . nullNotPermitted ( source , "source" ) ; StringBuilder sb = new StringBuilder ( ) ; for ( int i = 0 ; i < source . length ( ) ; i ++ ) { char c = source . charAt ( i ) ; switch ( c ) { case ' ' : { sb . append ( "&lt;" ) ; break ; } case ' ' : { sb . append ( "&gt;" ) ; break ; } case ' ' : { String next = source . substring ( i , Math . min ( i + 6 , source . length ( ) ) ) ; if ( next . startsWith ( "&lt;" ) || next . startsWith ( "&gt;" ) || next . startsWith ( "&amp;" ) || next . startsWith ( "&apos;" ) || next . startsWith ( "&quot;" ) ) { sb . append ( c ) ; } else { sb . append ( "&amp;" ) ; } break ; } case ' ' : { sb . append ( "&apos;" ) ; break ; } case ' ' : { sb . append ( "&quot;" ) ; break ; } default : sb . append ( c ) ; } } return sb . toString ( ) ; }
Returns a new string where any special characters in the source string
have been encoded.

@param source  the source string ({@code null} not permitted).

@return A new string with special characters escaped for XML.

@since 1.5
Returns a new string where any special characters in the source string have been encoded .