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...
*将List<String>按逗号连接成一个字符串。 *@paramlist待处理的List<String>*@return连接后的字符串 */publicstaticStringjoinStrings(List<String>list){if(list==null||list.isEmpty()){return"";}returnString.join(",",list);}publicstaticvoidmain(String[]args){List<String>names=List.of("Alice","...
public static String join(CharSequence delimiter, Iterable<? extends CharSequence> elements)作用:将elements用指定的字符串delimeter连接起来,返回这个新组成的字符串使用举例:List<String> strings = List.of("Java", "is", "cool"); String message = String.join(" ", strings); // message returned ...
Stringmessage=String.join("-","Java","is","cool"); //messagereturned is:"Java-is-cool"List<String> strings = new LinkedList<>(); strings.add("Java");strings.add("is"); strings.add("cool");Stringmessage=String.join(" ", strings); //messagereturned is:"Java is cool"Set<String> ...
message = String.join(" ", strings);// message returned is: "Java is cool"Set<String> strings = new LinkedHashSet<>(List.of("Java", "is", "very", "cool"));String message = String.join("-", strings);// message returned is: "Java-is-very-cool"参考资料：[1] jdk15.0.2 ...
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 ...
text.add("is"); text.add("fun"); String result; result = String.join("-", text); System.out.println(result);// Java-is-fun} } Run Code Here, anArrayListofStringtype is created. The elements of array list are joined using the-delimiter....
List<String>ages=Stream.of(17,22,35,12,37).filter(age->{System.out.println("filter1 处理:"+age);returnage>18;}).filter(age->{System.out.println("filter2 处理:"+age);returnage<35;}).map(age->{System.out.println("map 处理:"+age);returnage+"岁";}).collect(Collectors.toList()...
var joined = String.join("/", "2024", "7", "1"); A date is concatenated with theString.joinmethod. $ java Main.java 2016/8/5 Joining list The third example concatenates elements of a list. Main.java import java.util.List;
将一个List或者数组中的值拼接到一个字符串里并以逗号分隔开,这个场景相信大家都不陌生吧? 如果通过for循环和StringBuilder去循环拼接,还得考虑下最后一个逗号如何处理的问题,很繁琐: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 public void testForJoinStrings() { List<String> ids = Arrays.asList("...