Java Utililty Methods String Difference

List of utility methods to do String Difference

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Description

The list of methods to do String Difference are organized into topic(s).

Method

Stringdifference(String s1, String s2)
Compare two strings, and return the portion where they differ. 
int at = differenceAt(s1, s2);
if (at == -1) {
    return "";
return s2.substring(at);
intdifference(String str1, String str2)
Returns the number of characters in the two Strings that are the same. 
if (str1 == null || str2 == null) {
    return 0;
int lengthToMatch = Math.min(str1.length(), str2.length());
int diff = 0;
for (int i = 0; i < lengthToMatch; i++) {
    if (str1.charAt(i) == str2.charAt(i)) {
        diff++;
...
Stringdifference(String str1, String str2)
difference 
if (str1 == null) {
    return str2;
if (str2 == null) {
    return str1;
int at = indexOfDifference(str1, str2);
if (at == -1) {
...
Stringdifference(String str1, String str2)
difference 
if (str1 == null) {
    return str2;
if (str2 == null) {
    return str1;
int at = indexOfDifference(str1, str2);
if (at == -1) {
...
Stringdifference(String str1, String str2)
difference 
if (str1 == null) {
    return str2;
if (str2 == null) {
    return str1;
int at = indexOfDifference(str1, str2);
if (at == INDEX_NOT_FOUND) {
...
Stringdifference(String str1, String str2)

Compares two Strings, and returns the portion where they differ. 

if (str1 == null)
    return str2;
if (str2 == null)
    return str1;
int at = indexOfDifference(str1, str2);
if (at == -1)
    return EMPTY;
return str2.substring(at);
...
booleandifference(String string1, String string2)
difference 
boolean res = false;
if (string1 != null && string2 == null) {
    res = true;
} else if (string1 == null && string2 != null) {
    res = true;
} else if (string1 != null && string2 != null) {
    if (!string1.equalsIgnoreCase(string2)) {
        res = true;
...
Stringdifference(String xpath1, String xpath2)
difference 
String[] paths1 = split(xpath1);
String[] paths2 = split(xpath2);
int length = Math.min(paths1.length, paths2.length);
int index = 0;
while (index < length && paths1[index].equals(paths2[index])) {
    index++;
StringBuffer b = new StringBuffer();
...
intdifferenceAt(String s1, String s2)
Compare two strings, and return the index at which the strings begin to differ. 
int i;
for (i = 0; (i < s1.length()) && (i < s2.length()); ++i) {
    if (s1.charAt(i) != s2.charAt(i)) {
        break;
if ((i < s2.length()) || (i < s1.length())) {
    return i;
...
intdifferenceEncoded(String es1, String es2)
Returns the number of characters in the two Soundex encoded Strings that are the same. 
if (es1 == null || es2 == null) {
    return 0;
int lengthToMatch = Math.min(es1.length(), es2.length());
int diff = 0;
for (int i = 0; i < lengthToMatch; i++) {
    if (es1.charAt(i) == es2.charAt(i)) {
        diff++;
...