For instance, to replace all occurrences of a single character:<\/strong><\/p>\npublic class TechVidvanReplaceAll{ \r\npublic static void main(String args[]){ \r\nString s1=\"Good things takes time\"; \r\nString replaceString=s1.replaceAll(\"o\",\"e\");\r\nSystem.out.println(replaceString); \r\n}\r\n}<\/pre>\nOutput:<\/strong>
\nGood things takes time<\/p>\nExample:<\/h4>\n
For example, to replace all occurrences of a single word or collection of terms:<\/strong><\/p>\npublic class TechVidvanReplaceAll{ \r\npublic static void main(String args[]){ \r\nString s1=\"My name is Jaanu, her name is Nithu.\"; \r\nString replaceString=s1.replaceAll(\"is\",\"was\"); \r\nSystem.out.println(replaceString); \r\n}\r\n}<\/pre>\nOutput:<\/strong>
\nMy name was Jaanu, her name was Nithu.<\/p>\nExample:<\/h4>\n
Inserting spaces between characters was done by using the replaceAll() method:<\/strong><\/p>\npublic class ReplaceAllExample5 \r\n{ \r\n\/\/ main method \r\npublic static void main(String argvs[]) \r\n{ \r\n \r\n\/\/ input string \r\nString str = \"Cricket\"; \r\nSystem.out.println(str); \r\n \r\nString regex = \"\"; \r\n\/\/ adding a white space before and after every character of the input string. \r\nstr = str.replaceAll(regex, \" \"); \r\n \r\nSystem.out.println(str); \r\n \r\n} \r\n}<\/pre>\nOutput:<\/strong>
\nCricket
\nC r i c k e t<\/p>\nEscaping Characters in replaceAll()<\/h3>\n
Whether it is a regex or a regular string, the first argument to the replaceAll() method is up to you, mainly because a regular expression is a typical string.<\/p>\n
Regex contains characters with special meanings.<\/p>\n
The metacharacters are as follows:<\/strong><\/p>\n\\ ^ $ . | ? * + {} [] ()<\/pre>\nUse either the method or the replace() method to match the substring that contains metacharacters.<\/p>\n
Difference between replaceAll() and replace()<\/h3>\n\n- The ReplaceAll() method substitutes a new value for every occurrence of a supplied substring. On the other hand, the Replace() function is used to replace particular characters in a string with a new value. It merely swaps out the substring’s first “n” occurrences.<\/li>\n
- While the replace() method substitutes a single character, the replaceAll() function replaces a pattern (using regex). On the other hand, the replace() method uses a String as a replacement.<\/li>\n<\/ul>\n
How to replace all characters?<\/h3>\n\n- String.prototype.replaceAll(): <\/strong>A new string is produced by the replaceAll() method of the String data type, and it contains replacements for all pattern matches.<\/li>\n
- The replacement can be a string or a function that is called for each match, and the pattern can be either a string or a RegExp. The first string is not altered.<\/li>\n<\/ul>\n
Special Characters<\/h3>\n
![\"Internal](\"https:\/\/techvidvan.com\/tutorials\/wp-content\/uploads\/sites\/2\/2023\/11\/Internal-implementation.webp\")
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