Java Utililty Methods String Translate

if (str == null || str.length() == 0) {
    return str;
StringBuffer buffer = new StringBuffer(str.length());
char[] chrs = str.toCharArray();
char[] withChrs = replaceChars.toCharArray();
int sz = chrs.length;
int withMax = replaceChars.length() - 1;
...

Translate characters in a String.

if (str == null || str.length() == 0) {
    return str;
StringBuffer buffer = new StringBuffer(str.length());
char[] chrs = str.toCharArray();
char[] withChrs = replaceChars.toCharArray();
int sz = chrs.length;
int withMax = replaceChars.length() - 1;
...

if (str == null)
    throw new IllegalArgumentException("Input string cannot be null");
if (searchChars == null)
    throw new IllegalArgumentException("Search character string cannot be null");
if (searchChars.length() == 0)
    throw new IllegalArgumentException("Search character string cannot be empty");
if (searchChars.length() != replaceStrings.length)
    throw new IllegalArgumentException("Length of search characters (" + searchChars.length() + ") and "
...

String s = str.toUpperCase();
char[] outc = new char[s.length()];
for (int i = 0; i < s.length(); i++) {
    char c = s.charAt(i);
    int j = string_in.indexOf(c);
    outc[i] = string_out.charAt(j);
String outs = new String(outc);
...

if (ids != null) {
    for (String id : ids) {
        if (id.indexOf(alias) != -1) {
            return id;
    return null;
return alias;

Each character from[i] in sb is translated to to[i] .

For example translate (sb, "ab", "xy" converts abc to xyc .

for (int i = 0; i < sb.length(); i++) {
    for (int j = 0; j < from.length() && j < to.length(); j++) {
        if (sb.charAt(i) == from.charAt(j)) {
            sb.setCharAt(i, to.charAt(j));