Java Matcher replaceAll() Method

❮ RegEx Methods

import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class Main {
  public static void main(String[] args) {
    Pattern pattern = Pattern.compile("[0-9]+");
    Matcher matcher = pattern.matcher("The binary representation of 5 is 101.");
    System.out.println(matcher.replaceAll("#"));
  }
}

Definition and Usage

The replaceAll() method replaces every match of the pattern with a new text, and returns the result as a new string. The original text is not changed.

In the example, [0-9]+ means "one or more digits from 0 to 9", so each number is replaced with #.

Note: The characters $ and \ have a special meaning in the replacement text. For example, $1 inserts the text of group 1. Use Matcher.quoteReplacement() to make them normal characters.

Syntax

public String replaceAll(String replacement)

Parameter Values

Technical Details

Related Pages

Java RegEx Tutorial