How do I create a string search and replace using regex?

In this example you’ll see how we can create a small search and replace program using the regular expression classes in Java. The code below will replace all the brown word and change the color to red.

package org.kodejava.example.regex;

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

public class StringReplace {
    public static void main(String[] args) {
        String source = "The quick brown fox jumps over the brown lazy dog.";
        String find = "brown";
        String replace = "red";

        // Compiles the given regular expression into a pattern
        Pattern pattern = Pattern.compile(find);

        // Creates a matcher that will match the given input against the pattern
        Matcher matcher = pattern.matcher(source);

        // Replaces every subsequence of the input sequence that matches the
        // pattern with the given replacement string
        String output = matcher.replaceAll(replace);

        System.out.println("Source = " + source);
        System.out.println("Output = " + output);

Wayan Saryada

A programmer, runner, recreational diver, currently living in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, JPA, etc. If you need help on Java programming you can hire me on Fiverr.

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