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 ...
println("Double value: "+doubleVal); } } Output: Double value: 22.2345 Further reading: Java BigDecimal to String Read more → BigDecimal round Read more → BigDecimal to double with 2 decimal places If you want to restrict double to 2 decimal places, you can use BigDecimal’s set...
The easiest way to convert a string to a decimal number in Java is by using theDouble.parseDouble()method. This method takes a string as input and returns the corresponding decimal value. Here’s an example: Stringstr="3.14";doublevalue=Double.parseDouble(str);System.out.println(value);//...
区分大小写,如class不等于Class static String s1="你好";//类的属性=全局变量(成员变量) public First_ZhuLeiJieGou1() {//公开名字 // TODO Auto-generated constructor stub } public static void main(String[] args) {//程序开始执行的位置 //主类(主方法),权限修饰符,静态...
BigDecimal大小的比较都需要使用compareTo,如果需要返回更大的数或更小的数可以使用max、min。还要注意在BigDecimal中慎用equals。public static void main(String[] args) { BigDecimal a = BigDecimal.valueOf(12.3); BigDecimal b = BigDecimal.valueOf(12.32); System.out.println(a.compareTo(b)); // -1 ...
public classJavaDoublePrecision {/* Print Java double to 2 decimals of precision. */public static voidmain(String[] args) {doublebig= 1234.12345;floatsmall= 1234.12345f;System.out.printf("%,.2f :: %,.3f",big,small);/* Example prints:1,234.12 :: 1234.123*/}} ...
4,如果你非得用一个double变量来构造一个BigDecimal,没问题,我们贴心的提供了静态方法valueOf(double),这个方法跟new Decimal(Double.toString(double))效果是一样的。 说白了就是别直接拿double变量做参数,最好使用String类型做参数或者使用静态方法valueOf(double),我写了个例子试了一下: ...
3,BigDecimal(String val)构造是靠谱的,BigDecimal(“0.1”)就是妥妥的等于0.1,推荐大家用这个构造。 4,如果你非得用一个double变量来构造一个BigDecimal,没问题,我们贴心的提供了静态方法valueOf(double),这个方法跟new Decimal(Double.toString(double))效果是一样的。
2.Double.parseDouble We can convert aStringto adoubleusing theDouble.parseDoublemethod: 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...
publicstaticvoidmain(String[]args){ doublerandom=Math.random(); BigDecimalbd=newBigDecimal(random); BigDecimalroundOff=bd.setScale(2,RoundingMode.FLOOR); System.out.println(roundOff); } } DownloadRun Code That’s all about rounding up a float with 2 decimal places in Java. ...