StringreplaceFirst(Stringregex,Stringreplacement); 2.String.replaceFirst()Example The following Java program replaces the first occurrence of“java”with an uppercase “JAVA” string. Stringstr="howtodoinjava";
在Java中,String类提供了replace方法来替换字符串中出现的所有匹配项。其基本用法如下: publicStringreplace(CharSequencetarget,CharSequencereplacement) 1. 其中,target表示要替换的目标字符串,replacement表示用于替换目标字符串的新字符串。调用replace方法将返回一个新的字符串,其中所有匹配的目标字符串都被替换为新字符...
welcome to the world of Java";Stringtarget="world";Stringreplacement="Java";Stringresult=replaceSecondOccurrence(str,target,replacement);System.out.println(result);}publicstaticStringreplaceSecondOccurrence(Stringstr,Stringtarget,Stringreplacement){intfirstIndex=str.indexOf(target);if(firstIndex==-1){ret...
public static void main(String[] args) { String str = "This is text"; // Find index within this string of the first occurrence 'i'. // ==> 2 int idx = str.indexOf('i'); System.out.println("- indexOf('i') = " + idx); // Find index within this string of the first occ...
String replace (char charToReplace, char replacementChar) In the above “replace” method format, each occurrence of a character ‘charToReplace’ in a string is replaced with the character ‘replacementChar’ and a new String object containing this character sequence is returned. ...
(1)publicStringreplace(char oldChar, char newChar):把字符串中的oldChar替换为newChar (2)publicStringreplace(String oldStr, String newString):把字符串中的oldStr替换为newStr <五>、拆分功能 publicString[]split(Stringregex):根据给定正则表达式的匹配拆分字符串 ...
Thereplace()method is an overloaded method and comes in two versions: publicStringreplace(charoldChar,charnewChar);publicStringreplace(CharSequencetarget,CharSequencereplacement); The first method accepts thechartypes. It searches the string for specifiedoldCharand replaces each occurrence ofoldCharwith...
The replace() method replaces each matching occurrence of a character/text in the string with the new character/text. Example class Main { public static void main(String[] args) { String str1 = "bat ball"; // replace b with c System.out.println(str1.replace('b', 'c')); } }...
ReplaceFirst(String) Replaces the first subsequence of the input sequence that matches the pattern with the given replacement string. C# [Android.Runtime.Register("replaceFirst","(Ljava/lang/String;)Ljava/lang/String;","")]publicstringReplaceFirst(stringreplacement); ...
StringBuffer 上的主要操作是 append 和insert 方法,可重载这些方法,以接受任意类型的数据。每个方法都能有效地将给定的数据转换成字符串,然后将该字符串的字符添加或插入到字符串缓冲区中。append 方法始终将这些字符添加到缓冲区的末端;而 insert 方法则在指定的点添加字符。 例如,如果 z 引用一个当前内容是“st...