Android Utililty Methods String to Float Convert

List of utility methods to do String to Float Convert

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Description

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

Method

doubleString2AmountFloat(String str)
String Amount Float 
try {
    String tempStr = NumberFormat.getNumberInstance()
            .format(Long.parseLong(str, 10)).replace(",", "");
    return Long.parseLong(tempStr) / 100.00;
} catch (Exception e) {
    e.printStackTrace();
    return 0.00;
booleanisFloat(String str)
is Float 
if (isLong(str)) {
    return true;
Pattern pattern = Pattern.compile("\\d*\\.{1}\\d+");
Matcher isNum = pattern.matcher(str);
if (!isNum.matches()) {
    return false;
return true;
booleanisFloat(String str, int precision)
is Float 
String regStr = "\\d*\\.{1}\\d{" + precision + "}";
Pattern pattern = Pattern.compile(regStr);
Matcher isNum = pattern.matcher(str);
if (!isNum.matches()) {
    return false;
return true;
doublegetFloatValue(double val, int len)
get Float Value 
if (len <= 0) {
    return val;
int lastVal = (int) (val * (Math.pow(10, len + 1)))
        - ((int) (val * (Math.pow(10, len)))) * 10;
if (lastVal < 5) {
    return ((int) (val * (Math.pow(10, len))))
            / (Math.pow(10, len));
...
floatparseFloat(String string, float defValue)
Parses string to float 
try {
    return Float.parseFloat(string);
} catch (NumberFormatException nfe) {
    return defValue;
floatTryParse(String str, float defaultFloat)
Try Parse 
try {
    float f = Float.parseFloat(str);
    return f;
} catch (NumberFormatException ex) {
    return defaultFloat;
floatparseFloat(String value)
parse Float 
float result = (float) 0.00;
if (value.length() > 0) {
    try {
        result = round(Float.parseFloat(value), 1);
    } catch (Exception e) {
        return (float) 0.00;
return result;