StringEscapeUtils Java Methods to escape Java control chars ,quotes and unescape

StringEscapeUtils.escapeJava()

Escapes the characters in a String using Java String rules.

Deals correctly with quotes and control-chars (tab, backslash, cr, ff, etc.)

So a tab becomes the characters '\\' and 't'.

The only difference between Java strings and JavaScript strings is that in JavaScript, a single quote and forward-slash (/) are escaped.

Example:

input string: He didn't say, "Stop!"

output string: He didn't say, \"Stop!\"

StringEscapeUtils.unescapeJava()

Unescapes any Java literals found in the String. For example,

it will turn a sequence of '\' and 'n' into a newline character,

unless the '\' is preceded by another '\'.

Example Program:

package com.nagaraju.simplejson;

import org.apache.commons.text.StringEscapeUtils;

public class EscapeJavaSpecialChars {

public static void main(String[] args) {

//Case 1: Here we will see the out put as same as input

String string1 = StringEscapeUtils.escapeJava("\n");

System.out.println(string1);

//Case 2: Here we will see that the input \n becomes th new line

String string2 = StringEscapeUtils.unescapeJava("\n");

System.out.println(string2);

String string21="\n";

//Same as Case 2

System.out.println(string21);

//The Case 2 becomes Case 1 because we have used same method.

String string3 = StringEscapeUtils.escapeJava(string2);

System.out.println(string3);

}

}

Output:

\n

\n