Java String的join()方法 String关于join()有两个重载的方法 public static String join(CharSequence delimiter, CharSequence... elements) 作用:将elements用指定的字符串delimeter连接
使用String.join进行拼接 Java 8引入了String.join方法,可以更方便地对多个字符串进行拼接。 importjava.util.List;importjava.util.ArrayList;publicclassStringConcatenation{publicstaticStringconcatenateStrings(List<String>strings){returnString.join("",strings);}publicstaticvoidmain(String[]args){List<String>strings...
对于新的Stream Api,我们也可以同时使用Join Collector。 List<Person>list=Arrays.asList(newPerson("John","Smith"),newPerson("Anna","Martinez"),newPerson("Paul","Watson "));String joinedFirstNames=list.stream().map(Person::getFirstName).collect(Collectors.joining(", "));// "John, Anna, P...
而由list/tuple转换为str,则需要借助join()函数来实现。join()函数是这样描述的: """ S.join(iterable) -> str Return a string which is the concatenation of the strings in the iterable. The separator between elements is S. """ join()函数使用时,传入一个可迭代对象,返回一个可迭代的字符串,该...
1.2. Joining Array or List of Strings We can use this method to join the string items in the array to produce a joined string. String[]strArray={"How","To","Do","In","Java"};StringjoinedString=String.join(",",strArray);//How,To,Do,In,Java ...
public void testJoin() { List<String> list = new ArrayList<String>(); long ts = System.currentTimeMillis(); for (int i = 0; i < 10000; i++) { list.add(String.valueOf(i)); } StringUtils.join(list, ""); long te = System.currentTimeMillis(); ...
2.String.join()Example Let us see the example of both variations of the method. First, we will concatenate the strings passed asvarargs. Stringjoined=String.join("/","usr","local","bin"); The program output. usr/local/bin Next, we are joining aListof strings. ...
String s; char [] arr = s.toCharArray();//将String 转array String.valueOf(arr);//将array转String 集合<> string 1、集合转字符串 Set<String> set1 = new HashSet<>(); set1.add("a"); set1.add("b"); System.out.println(StringUtils.join(set1.toArray(), ","));//a,b List<St...
// 创建一个字符串列表List<String>fruits=Arrays.asList("Apple","Banana","Cherry");// 使用逗号作为分隔符,将列表中的字符串连接起来StringjoinedString=String.join(",",fruits);// 输出连接后的字符串System.out.println(joinedString);// 输出:Apple,Banana,Cherry ...
The third example concatenates elements of a list. Main.java import java.util.List; void main() { var words = List.of("Today", "is", "a", "beautiful", "day"); var joined = String.join(" ", words); System.out.println(joined); ...