大连企业网站,网页设计及讲解多少钱,高端汽车,网页设计美食如果此流不为null#xff0c;则ofNullable(T)方法将返回包含单个元素的顺序Stream#xff0c;否则该方法将返回空Stream。它有助于处理空流和NullPointerException。用法:static Stream ofNullable(T t)参数#xff1a;此方法接受单个参数t#xff0c;该参数t是要返回其Str…如果此流不为null则ofNullable(T)方法将返回包含单个元素的顺序Stream否则该方法将返回空Stream。它有助于处理空流和NullPointerException。用法:static Stream ofNullable(T t)参数此方法接受单个参数t该参数t是要返回其Stream的单个元素。返回值如果指定的元素为非null则此方法返回带有单个元素的流否则为空。以下示例程序旨在说明ofNullable(T)方法示例1:// Java program to demonstrate// Stream.ofNullable() methodimport java.util.stream.Stream;public class GFG {public static void main(String[] args){// Create a stream with nullStream value Stream.ofNullable(null);// Print valuesSystem.out.println(Values of Stream:);value.forEach(System.out::println);}}IDE的控制台上打印的输出如下所示。输出示例2:// Java program to demonstrate// Stream.ofNullable methodimport java.util.ArrayList;import java.util.stream.Stream;public class GFG {public static void main(String[] args){// Create ArrayList containing namesArrayList list new ArrayList();list.add(Aman);list.add(Suraj);list.add(Zufaq);// create a stream with ArrayListStream value Stream.ofNullable(list);// print valuesSystem.out.println(Values of Stream:);value.forEach(System.out::println);}}控制台上打印的输出如下所示。输出
