本文整理了Java中org.apache.spark.api.java.Optional.ofNullable()方法的一些代码示例，展示了Optional.ofNullable()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。Optional.ofNullable()方法的具体详情如下：
包路径：org.apache.spark.api.java.Optional
类名称：Optional
方法名：ofNullable

Optional.ofNullable介绍

暂无

代码示例

代码示例来源：origin: org.apache.spark/spark-core_2.11

/**
 * @param value value to wrap, which may be null
 * @return {@code Optional} wrapping this value, which may be empty
 */
public static <T> Optional<T> fromNullable(T value) {
 return ofNullable(value);
}

代码示例来源：origin: org.apache.spark/spark-core_2.10

/**
 * @param value value to wrap, which may be null
 * @return {@code Optional} wrapping this value, which may be empty
 */
public static <T> Optional<T> fromNullable(T value) {
 return ofNullable(value);
}

代码示例来源：origin: org.apache.spark/spark-core

/**
 * @param value value to wrap, which may be null
 * @return {@code Optional} wrapping this value, which may be empty
 */
public static <T> Optional<T> fromNullable(T value) {
 return ofNullable(value);
}

代码示例来源：origin: org.apache.spark/spark-core_2.11

@Test
public void testOfNullable() {
 Assert.assertTrue(Optional.ofNullable(1).isPresent());
 Assert.assertNotNull(Optional.ofNullable(1).orNull());
 Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).get());
 Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).or(2));
 Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).orElse(2));
 Assert.assertFalse(Optional.ofNullable(null).isPresent());
 Assert.assertNull(Optional.ofNullable(null).orNull());
 Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>ofNullable(null).or(2));
 Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>ofNullable(null).orElse(2));
}

代码示例来源：origin: org.apache.spark/spark-core

@Test
public void testOfNullable() {
 Assert.assertTrue(Optional.ofNullable(1).isPresent());
 Assert.assertNotNull(Optional.ofNullable(1).orNull());
 Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).get());
 Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).or(2));
 Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).orElse(2));
 Assert.assertFalse(Optional.ofNullable(null).isPresent());
 Assert.assertNull(Optional.ofNullable(null).orNull());
 Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>ofNullable(null).or(2));
 Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>ofNullable(null).orElse(2));
}

代码示例来源：origin: org.apache.spark/spark-core_2.10

@Test
public void testOfNullable() {
 Assert.assertTrue(Optional.ofNullable(1).isPresent());
 Assert.assertNotNull(Optional.ofNullable(1).orNull());
 Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).get());
 Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).or(2));
 Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).orElse(2));
 Assert.assertFalse(Optional.ofNullable(null).isPresent());
 Assert.assertNull(Optional.ofNullable(null).orNull());
 Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>ofNullable(null).or(2));
 Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>ofNullable(null).orElse(2));
}

代码示例来源：origin: seznam/euphoria

private static <T> Optional<T> opt(T val) {
 return Optional.ofNullable(val);
}