static doubletoDouble(String str): Convert a String to a double, returning 0.0d if the conversion fails. static doubletoDouble(String str, double defaultValue): Convert a String to a double, returning a default value if the conversion fails. static DoublecreateDouble(String str): Convert a St...
下面是一个示例代码,演示了如何使用BigDecimal类来将字符串转换为double类型并保留指定的精度: importjava.math.BigDecimal;publicclassStringToDouble{publicstaticvoidmain(String[]args){Stringstr="3.1415926";BigDecimalbd=newBigDecimal(str);doublenum=bd.doubleValue();System.out.println(num);// 输出:3.1415926}}...
public class StringToDoubleWithTwoDecimals { public static void main(String[] args) { String str = "3.14159"; double num = convertStringToDoubleWithTwoDecimals(str); if (num != 0.0) { // 假设0.0表示转换失败或异常处理 System.out.println("保留两位小数后的值为: " + num); } } public ...
publicclassStringToDoubleExample{publicstaticvoidmain(String[]args){StringnumberStr="123.45";// 有效的数字字符串try{doublenumber=Double.parseDouble(numberStr);// 转换为doubleSystem.out.println("Converted number: "+number);}catch(NumberFormatExceptione){System.err.println("Invalid number format: "+nu...
3.Double.valueOf Similarly, we can convert aStringinto aboxedDoubleusing theDouble.valueOfmethod: Note that the returned value ofDouble.valueOfis a boxedDouble. Since Java 5, this boxedDoubleis converted by the compiler to a primitivedoublewhere needed. ...
class StringToDouble { public static void main(String[] args) { String str = "123.45...
在Java中处理字符串转换为double可能引发的异常，通常采用try-catch块捕获`NumberFormatException`。当字符串包含非数字字符、空白或特殊符号，转换失败时，此异常会抛出。示例代码如下：java public class Main { public static void main(String[] args) { String strToConvert = "123.45abc"; // 包含...
String strToConvert = "123.45abc"; // 包含非数字字符的字符串 try { double result =Double....
String toDouble=newDecimalFormat(type).format(Double.parseDouble(money));returntoDouble; } } 十六进制字符串高低位转换(“dc45fd45”转化成“45fd45dc”) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
publicclassStringToDoubleExample{publicstaticvoidmain(String[]args){Stringstr="abc";doublenum=convertToDouble(str);System.out.println("转换后的数字为: "+num);}publicstaticdoubleconvertToDouble(Stringstr){doubleresult=0;try{result=Double.parseDouble(str);}catch(NumberFormatExceptione){System.out.prin...