public class ConvertUtil {

//把String轉化為float

public static float convertToFloat(String number, float defaultValue) {

if (TextUtils.isEmpty(number)) {

return defaultValue;

}

try {

return Float.parseFloat(number);

} catch (Exception e) {

return defaultValue;

}

}

//把String轉化為double

public static double convertToDouble(String number, double defaultValue) {

if (TextUtils.isEmpty(number)) {

return defaultValue;

}

try {

return Double.parseDouble(number);

} catch (Exception e) {

return defaultValue;

}

}

//把String轉化為int

public static int convertToInt(String number, int defaultValue) {

if (TextUtils.isEmpty(number)) {

return defaultValue;

}

try {

return Integer.parseInt(number);

} catch (Exception e) {

return defaultValue;

}

}

---------------------

使用時只需調用上面的方法即可（第二個參數是默認值）：

int yeatInt = ConvertUtil.convertToInt("2017",2015);