Thejoin()method returns a newstringwith the given elements joined with the specified delimiter. Example classMain{publicstaticvoidmain(String[] args){ String str1 ="I"; String str2 ="love"; String str3 ="Java";
This tutorial contains Java examples to join orconcatenate a string array to produce a single string using comma delimiterwhere items will be separated by a given separator. This code can be used toconvert an array to a comma-separated string in Java. We may need this information many times ...
StringJoineris used to construct a sequence of characters separated by a delimiter and optionally starting with a supplied prefix and ending with a supplied suffix. StringJoineris also used internally by thejoinmethod of theStringclass. Using StringJoiner The following example joins numbers with theStri...
第一步:了解string.join方法的语法和参数 在介绍具体的使用方法之前,我们需要先了解string.join方法的用法。在Java编程语言中,我们可以使用以下语法调用该方法: Stringjoin(CharSequence delimiter, CharSequence... elements) 其中,delimiter参数指定了元素之间的分隔符,而elements参数是一个可变参数,表示要连接的字符串数...
15:ldc#4// String 沉默 17:invokespecial#5// Method java/lang/String."<init>":(Ljava/lang/String;)V 20:astore_3 21:ldc#6// String 王二 23:astore4 25:aload_1 26:aload_3 27:aload4 29:invokedynamic#7,0// InvokeDynamic #0:makeConcatWithConstants:(Ljava/lang/String;Ljava/lang/String;...
public static void main(String[] args) { String str = "java"; System.out.println(str.equalsIgnoreCase("JAVA")); } } 1. 2. 3. 4. 5. 6. true 真正 indexOf()方法 (indexOf()method) StringindexOf()method returns the index of first occurrence of a substring or a character. indexOf(...
String staticStr3 = String.format("Hello,%s","World"); System.out.println(staticStr3); //join(CharSequence delimiter, CharSequence... elements) 返回一个新的字符串,由 CharSequence elements的副本组成,并附有指定的delimiter的 delimiter 。
Since Java 8, we can use String.join() method to concatenate strings with a specified delimiter. For advanced usages, use StringJoiner class.
String14:dup15:ldc #4// String 沉默17:invokespecial #5// Method java/lang/String."<init>":(Ljava/lang/String;)V20:astore_321:ldc #6// String 王二23:astore425:aload_126:aload_327:aload429:invokedynamic #7,0// InvokeDynamic #0:makeConcatWithConstants:(Ljava/lang/String;Ljava/lang/...
System.out.println(staticStr4);//join(CharSequence delimiter, Iterable<? extends CharSequence> elements)ArrayList<String> text =newArrayList<>(); text.add("Java"); text.add("is"); text.add("fun"); String staticStr5= String.join("-",text); ...