Matcher replaceAll(String) method in Java with Examples
Last Updated :
01 Jul, 2020
The replaceAll(String) method of Matcher Class behaves as a append-and-replace method. This method reads the input string and replace it with the matched pattern in the matcher string.
Syntax:
public String replaceAll(String stringToBeReplaced)
Parameters: This method takes a parameter stringToBeReplaced which is the String to be replaced in the matcher.
Return Value: This method returns a String with the target String constructed by replacing the String.
Below examples illustrate the Matcher.replaceAll() method:
Example 1:
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
String regex = "(Geeks)";
Pattern pattern = Pattern.compile(regex);
String stringToBeMatched
= "GeeksForGeeks Geeks for For Geeks Geek";
Matcher matcher
= pattern.matcher(stringToBeMatched);
System.out.println("Before Replacement: "
+ stringToBeMatched);
String stringToBeReplaced = "GFG";
StringBuilder builder
= new StringBuilder();
System.out.println("After Replacement: "
+ matcher
.replaceAll(stringToBeReplaced));
}
}
|
Output:
Before Replacement: GeeksForGeeks Geeks for For Geeks Geek
After Replacement: GFGForGFG GFG for For GFG Geek
Example 2:
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
String regex = "(FGF)";
Pattern pattern = Pattern.compile(regex);
String stringToBeMatched
= "GFGFGFGFGFGFGFGFGFG FGF GFG GFG FGF";
Matcher matcher
= pattern.matcher(stringToBeMatched);
String stringToBeReplaced = "GFG";
StringBuilder builder
= new StringBuilder();
System.out.println("After Replacement: "
+ matcher
.replaceAll(stringToBeReplaced));
}
}
|
Output:
After Replacement: GGFGGGFGGGFGGGFGGFG GFG GFG GFG GFG
Reference: https://docs.oracle.com/javase/9/docs/api/java/util/regex/Matcher.html#replaceAll-java.lang.String-
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