ToLongFunction<T>:接受一个类型为T的参数,返回一个长整数值。 ToDoubleFunction<T>:接受一个类型为T的参数,返回一个双精度浮点数值。 代码示例 以下是一个使用map函数将字符串转换为大写的示例: importjava.util.Arrays;importjava.util.List;importjava.util.stream.Collectors;publicclassMapFunctionExample{public...
Java Examples The following examples show how to use org.apache.flink.api.common.functions.RichFlatMapFunction. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may ...
6. Java 8 Map functional Example: Convert String to uppercase and Join them with comaSo far, we have seen examples of the only the filter() method, in this example, we will learn how to use the map() function. List<String> G7 = Arrays.asList("USA", "Japan", "France", "...
That's why the Stream.map(Function mapper) takes a function as an argument. For example, by using the map() function, you can convert a list of String into a List of Integer by applying theInteger.valueOf()method to each String on the input list. All you need is a mapping function ...
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associates it with the given non-null value. Otherwise, replaces the associated value with the results of the given remapping function, or removes if the result isnull. This method may be of use when combining multiple mapped values for a key. For example, to either create or append aString...
其中,key表示要合并值的键,value表示要合并的值,remappingFunction用于定义合并逻辑的函数。该函数接受两个参数:原始值和要合并的新值,并返回合并后的值。 以下是一个示例代码,演示如何使用merge方法: importjava.util.HashMap;importjava.util.Map;publicclassMergeExample{publicstaticvoidmain(String[] args){ ...
现在,我们将使用Map、Predicate和Function来重写这段逻辑: importjava.util.HashMap;importjava.util.Map;importjava.util.function.Function;importjava.util.function.Predicate;publicclassIfReplacementExample {publicstaticvoidmain(String[] args) {String input= "someValue";String result=processInput(input);System...
import java.util.HashMap; import java.util.Map; public class HashMapExample { public static void main(String[] args) { Map<String, Integer> vehicles = new HashMap<>(); // Add some vehicles. vehicles.put("BMW", 5); vehicles.put("Mercedes", 3); vehicles.put("Audi", 4); vehicles...
Example 1: Multiplication Operation Code Snippet: importjava.util.*;classDemo{// Here, we write the driver codepublicstaticvoidmain(String[] args){ System.out.println("The method will generate a new stream after using "+"the function : ");// Here, we create a list of integersList<Intege...