public class ScientificNotationConverter { public static void main(String[] args) { double number = 2500000; BigDecimal bigDecimal = new BigDecimal(number); String scientificNotationStr = bigDecimal.toEngineeringString(); double scientificNotationDouble = Double.parseDouble(scientificNotationStr); System....
// 显示double的科学计数法System.out.println("Scientific Notation: "+scientificNotation); 1. 2. 4. 测试实现 最后,我们可以编写一个测试方法来验证我们的实现是否正确。 publicstaticvoidmain(String[]args){doublemyDouble=1234567890.123456789;NumberFormatformatter=newDecimalFormat("0.###E0");StringscientificNo...
publicclassScientificNotationConverter{publicstaticvoidmain(String[]args){StringscientificNotation="1.23E6";doublenumber=Double.parseDouble(scientificNotation);System.out.println("科学计数法:"+scientificNotation);System.out.println("转换结果:"+number);}} 1. 2. 3. 4. 5. 6. 7. 8. 9. 在上面的代...
inta =0x2f;//小写十六进制(等价于0x002f) System.out.println(Integer.toBinaryString(a));//101111 intb =0x2F;//大写十六进制 System.out.println(Integer.toBinaryString(b));//101111 intc =10;//标准十进制 System.out.println(Integer.toBinaryString(c));//1010 intd =010;//以零开头,表示八...
public class BigDecimalToScientificNotation { public static void main(String[] args) { BigDecimal bigDecimal = new BigDecimal("12345678901234567890"); String scientificNotation = bigDecimal.toString(); //将BigDecimal转换为字符串 double doubleValue =Double.parseDouble(scientificNotation); //将字符串转换为...
Effective JavaItem 48: Avoid float and double if exact answers are required 对于精确计算不提倡使用float,double,因为会丢失精度,这是为什么呢? 让我细细说来 1. 什么是浮点数? 表示一个数字如100.2,可以是Fixed point也就是100.2,也可以是Floating point(也就是科学计数法scientific notation)1.002×102. ...
Java防止科学计数法 numnum=return
Ifmis less than 10-3or greater than or equal to 107, then it is represented in so-called "computerized scientific notation." Letnbe the unique integer such that 10n≤m< 10n+1; then letabe the mathematically exact quotient ofmand 10nso that 1 ≤a< 10. The magnitude is then represented...
sis regarded as representing an exact decimal value in the usual "computerized scientific notation" or as an exact hexadecimal value; this exact numerical value is then conceptually converted to an "infinitely precise" binary value that is then rounded to typedoubleby the usual round-to-nearest ...
If m is less than 10-3 or greater than or equal to 107, then it is represented in so-called "computerized scientific notation." Let n be the unique integer such that 10n ≤ m< 10n+1; then let a be the mathematically exact quotient of m and 10n so that 1 ≤ a< 10. ...