How do I print escape characters in Java?

Solution 1:

Use the method "StringEscapeUtils.escapeJava" in Java lib "org.apache.commons.lang"

String x = "hello\nworld";
System.out.print(StringEscapeUtils.escapeJava(x));

Solution 2:

One way to do this is:

public static String unEscapeString(String s){
    StringBuilder sb = new StringBuilder();
    for (int i=0; i<s.length(); i++)
        switch (s.charAt(i)){
            case '\n': sb.append("\\n"); break;
            case '\t': sb.append("\\t"); break;
            // ... rest of escape characters
            default: sb.append(s.charAt(i));
        }
    return sb.toString();
}

and you run System.out.print(unEscapeString(x)).