* @return {@code true} if and only if the specified {@code Object} is a * {@code BigDecimal} whose value and scale are equal to this * {@code BigDecimal}'s. * @see #compareTo(java.math.BigDecimal) * @see #hashCode */ @Override public boolean equals(Object x) { // 比较对象...
This code would fail in a multi-threaded context. Multiple threads could call thegetInstance()method and end up creating multiple instances of the Singleton. This is undesired behaviour. Basic property of Singleton is that there should only be a single instance of the class in JVM. Advantages: ...
*/ public class ProductServiceImpl implements ProductService { @Override public Product getProductByCode(String productCode) { //query from DB system, more operation in here if (null == productCode || productCode.trim().isEmpty()) { return null; } else { return new Product("product001","...
* Returns the value of this {@code Double} as an {@code int} * after a narrowing primitive conversion. * @jls 5.1.3 Narrowing Primitive Conversions * * @return the {@code double} value represented by this object * converted to type {@code int} */publicintintValue(){return(int)value...
doubleValuein classNumber Returns: thedoublevalue represented by this object hashCode public static int hashCode(double value) Returns a hash code for adoublevalue; compatible withDouble.hashCode(). Parameters: value- the value to hash Returns: ...
...; double b = 100.12; double v = a / b; int i = new Double(v).intValue();...converted to type {@code int} */ public int intValue() { return (int)value; } 通过以上的官方源码可以发现...,这个方法需要创建Double对象,才能调用这个方法。...3、授之以渔 这个是官方源码的构造方法...
java.lang.Object org.bson.codecs.DoubleCodec All Implemented Interfaces:Codec<Double>, Decoder<Double>, Encoder<Double>public class DoubleCodec extends Object implements Codec<Double>Encodes and decodes Double objects.Since: 3.0Constructor Summary Constructors ConstructorDescription DoubleCodec() Method ...
*/ STRING, /** * A JSON number represented in this API by a Java {@code double}, {@code * long}, or {@code int}. */ NUMBER, /** * A JSON {@code true} or {@code false}. */ BOOLEAN, /** * A JSON {@code null}. */ NULL, /** * The end of the JSON stream. ...
a hash code value for adoublevalue. Attributes RegisterAttribute Remarks Returns a hash code for adoublevalue; compatible withDouble.hashCode(). Added in 1.8. Java documentation forjava.lang.Double.hashCode(double). Portions of this page are modifications based on work created and shared by theAn...
text/java {@code DoubleSummaryStatistics stats = people.stream() .collect(Collectors.summarizingDouble(Person::getWeight)); } This computes, in a single pass, the count of people, as well as the minimum, maximum, sum, and average of their weights. ...