Java Utililty Methods String to

int convertString(char firstCharacter, String value)
convert String

int result = 0;
for (int i = 0; i < value.length(); i++) {
 result = result * LETTER_BASE + value.charAt(i) - firstCharacter;
return result;

String convertString(Object obj, String nullTo)
convert String

return obj == null ? nullTo : obj.toString();

String convertString(String label)
Escape all occurences of newline chars '\n', quotes \", etc.

char[] ch = label.toCharArray();
StringBuffer buf = new StringBuffer();
for (int i = 0; i < ch.length; i++) {
 switch (ch[i]) {
 case '\n':
 buf.append("\\n");
 break;
 case '\r':
...

String convertString(String s)
convert String

if (s == null) {
 return "";
return s;

Object convertString(String s, Class cls)
Convert a string into an object of given type.

if (cls == Integer.class) {
 return Integer.valueOf(s);
} else if (cls == String.class) {
 return s;
} else {
 throw new IllegalArgumentException("Don't know how to convert string to " + cls.getName());

String convertString(String strValue)
convert String

return (strValue == null || strValue.equals("")) ? "" : strValue;

T convertString(String value, Class type)
convert String

if (type.equals(Long.class))
 return (T) Long.valueOf(value);
if (type.equals(Double.class))
 return (T) Double.valueOf(value);
if (type.equals(Integer.class))
 return (T) Integer.valueOf(value);
if (type.equals(Boolean.class))
 return (T) Boolean.valueOf(value);
...

byte[] convertString2Bytes(String str)
convert String Bytes

byte[] result = new byte[str.length()];
for (int i = 0; i < str.length(); i++) {
 result[i] = (byte) str.charAt(i);
return result;

String convertString2GSonString(String str)
convert String G Son String

str = str.replace("\"", "\\\"").replace("\n", "\\\n"); 
StringBuffer ostr = new StringBuffer();
for (int i = 0; i < str.length(); i++) {
 char ch = str.charAt(i);
 if ((ch >= 0x0020) && (ch <= 0x007e)) {
 ostr.append(ch);
 } else {
 ostr.append("\\u"); 
...

float[] convertStringArrayToFloatArray(String[] num)
Convert array of strings to array of float

if (num != null) {
 float fArray[] = new float[num.length];
 for (int i = 0; i < num.length; i++) {
 fArray[i] = Float.parseFloat(num[i]);
 return fArray;
return null;
...