java.lang.Double.valueOf()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.lang.Double.valueOf()方法的一些代码示例，展示了Double.valueOf()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Double.valueOf()方法的具体详情如下：
包路径：java.lang.Double
类名称：Double
方法名：valueOf

Double.valueOf介绍

[英]Returns a Double instance for the specified double value.
[中]

代码示例

代码示例来源：origin: google/guava

@Override
protected Double doForward(String value) {
 return Double.valueOf(value);
}

代码示例来源：origin: spring-projects/spring-framework

@Override
protected Double doParse(String parameter) throws NumberFormatException {
  return Double.valueOf(parameter);
}

代码示例来源：origin: apache/incubator-dubbo

public static Double boxed(double v) {
  return Double.valueOf(v);
}

代码示例来源：origin: apache/incubator-dubbo

public static Double boxed(double v) {
  return Double.valueOf(v);
}

代码示例来源：origin: square/retrofit

@Override public Double convert(ResponseBody value) throws IOException {
  return Double.valueOf(value.string());
 }
}

代码示例来源：origin: apache/incubator-dubbo

/**
   * check if the environment is java 8 or beyond
   *
   * @return if on java 8
   */
  private static boolean isJava8() {
    String javaVersion = System.getProperty("java.specification.version");
    return Double.valueOf(javaVersion) >= 1.8;
  }
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Append a double field value.
 * @param fieldName the name of the field, usually the member variable name
 * @param value the field value
 * @return this, to support call-chaining
 */
public ToStringCreator append(String fieldName, double value) {
  return append(fieldName, Double.valueOf(value));
}

代码示例来源：origin: google/guava

/**
 * A reference implementation for {@code tryParse} that just catches the exception from {@link
 * Double#valueOf}.
 */
private static Double referenceTryParse(String input) {
 if (input.trim().length() < input.length()) {
  return null;
 }
 try {
  return Double.valueOf(input);
 } catch (NumberFormatException e) {
  return null;
 }
}

代码示例来源：origin: hankcs/HanLP

private static Matrix read_vector(IOUtil.LineIterator lineIterator)
{
  int rows = Integer.valueOf(lineIterator.next());
  double[][] valueArray = new double[rows][1];
  String[] args = lineIterator.next().split("\t");
  for (int i = 0; i < rows; i++)
  {
    valueArray[i][0] = Double.valueOf(args[i]);
  }
  return new Matrix(valueArray);
}

代码示例来源：origin: google/guava

public void testForMapWildCardWithDefault() {
 Map<String, Integer> map = Maps.newHashMap();
 map.put("One", 1);
 map.put("Three", 3);
 Number number = Double.valueOf(42);
 Function<String, Number> function = Functions.forMap(map, number);
 assertEquals(1, function.apply("One").intValue());
 assertEquals(number, function.apply("Two"));
 assertEquals(3L, function.apply("Three").longValue());
}

代码示例来源：origin: google/guava

public void testCompare() {
 for (double x : VALUES) {
  for (double y : VALUES) {
   // note: spec requires only that the sign is the same
   assertEquals(x + ", " + y, Double.valueOf(x).compareTo(y), Doubles.compare(x, y));
  }
 }
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void convertDoubleToBigInteger() {
  Double decimal = Double.valueOf(3.14d);
  assertEquals(new BigInteger("3"), NumberUtils.convertNumberToTargetClass(decimal, BigInteger.class));
}

代码示例来源：origin: google/guava

@GwtIncompatible // Doubles.tryParse
private static void checkTryParse(double expected, String input) {
 assertEquals(Double.valueOf(expected), Doubles.tryParse(input));
 assertThat(input)
   .matches(
     Pattern.compile(
       Doubles.FLOATING_POINT_PATTERN.pattern(), Doubles.FLOATING_POINT_PATTERN.flags()));
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void testStringToDouble() {
  assertEquals(Double.valueOf("1.0"), conversionService.convert("1.0", Double.class));
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void testDoubleToString() {
  assertEquals("1.0", conversionService.convert(Double.valueOf("1.0"), String.class));
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parseNumberUsingNumberFormat() {
  NumberFormat nf = NumberFormat.getNumberInstance(Locale.US);
  String aByte = "" + Byte.MAX_VALUE;
  String aShort = "" + Short.MAX_VALUE;
  String anInteger = "" + Integer.MAX_VALUE;
  String aLong = "" + Long.MAX_VALUE;
  String aFloat = "" + Float.MAX_VALUE;
  String aDouble = "" + Double.MAX_VALUE;
  assertEquals("Byte did not parse", Byte.valueOf(Byte.MAX_VALUE), NumberUtils.parseNumber(aByte, Byte.class, nf));
  assertEquals("Short did not parse", Short.valueOf(Short.MAX_VALUE), NumberUtils.parseNumber(aShort, Short.class, nf));
  assertEquals("Integer did not parse", Integer.valueOf(Integer.MAX_VALUE), NumberUtils.parseNumber(anInteger, Integer.class, nf));
  assertEquals("Long did not parse", Long.valueOf(Long.MAX_VALUE), NumberUtils.parseNumber(aLong, Long.class, nf));
  assertEquals("Float did not parse", Float.valueOf(Float.MAX_VALUE), NumberUtils.parseNumber(aFloat, Float.class, nf));
  assertEquals("Double did not parse", Double.valueOf(Double.MAX_VALUE), NumberUtils.parseNumber(aDouble, Double.class, nf));
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parseNumberRequiringTrimUsingNumberFormat() {
  NumberFormat nf = NumberFormat.getNumberInstance(Locale.US);
  String aByte = " " + Byte.MAX_VALUE + " ";
  String aShort = " " + Short.MAX_VALUE + " ";
  String anInteger = " " + Integer.MAX_VALUE + " ";
  String aLong = " " + Long.MAX_VALUE + " ";
  String aFloat = " " + Float.MAX_VALUE + " ";
  String aDouble = " " + Double.MAX_VALUE + " ";
  assertEquals("Byte did not parse", Byte.valueOf(Byte.MAX_VALUE), NumberUtils.parseNumber(aByte, Byte.class, nf));
  assertEquals("Short did not parse", Short.valueOf(Short.MAX_VALUE), NumberUtils.parseNumber(aShort, Short.class, nf));
  assertEquals("Integer did not parse", Integer.valueOf(Integer.MAX_VALUE), NumberUtils.parseNumber(anInteger, Integer.class, nf));
  assertEquals("Long did not parse", Long.valueOf(Long.MAX_VALUE), NumberUtils.parseNumber(aLong, Long.class, nf));
  assertEquals("Float did not parse", Float.valueOf(Float.MAX_VALUE), NumberUtils.parseNumber(aFloat, Float.class, nf));
  assertEquals("Double did not parse", Double.valueOf(Double.MAX_VALUE), NumberUtils.parseNumber(aDouble, Double.class, nf));
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parseNumber() {
  String aByte = "" + Byte.MAX_VALUE;
  String aShort = "" + Short.MAX_VALUE;
  String anInteger = "" + Integer.MAX_VALUE;
  String aLong = "" + Long.MAX_VALUE;
  String aFloat = "" + Float.MAX_VALUE;
  String aDouble = "" + Double.MAX_VALUE;
  assertEquals("Byte did not parse", Byte.valueOf(Byte.MAX_VALUE), NumberUtils.parseNumber(aByte, Byte.class));
  assertEquals("Short did not parse", Short.valueOf(Short.MAX_VALUE), NumberUtils.parseNumber(aShort, Short.class));
  assertEquals("Integer did not parse", Integer.valueOf(Integer.MAX_VALUE), NumberUtils.parseNumber(anInteger, Integer.class));
  assertEquals("Long did not parse", Long.valueOf(Long.MAX_VALUE), NumberUtils.parseNumber(aLong, Long.class));
  assertEquals("Float did not parse", Float.valueOf(Float.MAX_VALUE), NumberUtils.parseNumber(aFloat, Float.class));
  assertEquals("Double did not parse", Double.valueOf(Double.MAX_VALUE), NumberUtils.parseNumber(aDouble, Double.class));
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void parseNumberRequiringTrim() {
  String aByte = " " + Byte.MAX_VALUE + " ";
  String aShort = " " + Short.MAX_VALUE + " ";
  String anInteger = " " + Integer.MAX_VALUE + " ";
  String aLong = " " + Long.MAX_VALUE + " ";
  String aFloat = " " + Float.MAX_VALUE + " ";
  String aDouble = " " + Double.MAX_VALUE + " ";
  assertEquals("Byte did not parse", Byte.valueOf(Byte.MAX_VALUE), NumberUtils.parseNumber(aByte, Byte.class));
  assertEquals("Short did not parse", Short.valueOf(Short.MAX_VALUE), NumberUtils.parseNumber(aShort, Short.class));
  assertEquals("Integer did not parse", Integer.valueOf(Integer.MAX_VALUE), NumberUtils.parseNumber(anInteger, Integer.class));
  assertEquals("Long did not parse", Long.valueOf(Long.MAX_VALUE), NumberUtils.parseNumber(aLong, Long.class));
  assertEquals("Float did not parse", Float.valueOf(Float.MAX_VALUE), NumberUtils.parseNumber(aFloat, Float.class));
  assertEquals("Double did not parse", Double.valueOf(Double.MAX_VALUE), NumberUtils.parseNumber(aDouble, Double.class));
}

代码示例来源：origin: spring-projects/spring-framework

@Test
public void testDefaultFormattersOn() throws Exception {
  FormattingConversionServiceFactoryBean factory = new FormattingConversionServiceFactoryBean();
  factory.afterPropertiesSet();
  FormattingConversionService fcs = factory.getObject();
  TypeDescriptor descriptor = new TypeDescriptor(TestBean.class.getDeclaredField("pattern"));
  LocaleContextHolder.setLocale(Locale.GERMAN);
  try {
    Object value = fcs.convert("15,00", TypeDescriptor.valueOf(String.class), descriptor);
    assertEquals(15.0, value);
    value = fcs.convert(15.0, descriptor, TypeDescriptor.valueOf(String.class));
    assertEquals("15", value);
  }
  finally {
    LocaleContextHolder.resetLocaleContext();
  }
}

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