Java Utililty Methods Boolean to String

if (values == null) {
    return null;
String[] results = new String[values.length];
for (int i = 0; i < values.length; i++) {
    results[i] = String.valueOf(values[i]);
return results;
...

if (boolVal != null) {
    if (boolVal.equalsIgnoreCase("true") || boolVal.equalsIgnoreCase("false")) {
        return boolVal.toLowerCase();
return null;

String result = "false";
if (bool) {
    result = "true";
return result;

if (str == null) {
    return "0";
if (str.equals("0")) {
    return "0";
str = str.toLowerCase();
if (str.equals("false")) {
...

if (Boolean.TRUE.equals(value)) {
    return YES;
return NO;

if (x)
    return "true";
else
    return "false";

return b ? "yes" : "no";

if (bValue == null)
    return "null";
return BoolToString(bValue);

return !flag ? "1" : "0";

if (booleanValue != null)
    return (booleanValue == 1) ? "true" : "false";
return null;