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Thread: Replace function

  1. #1
    Junior Member
    Join Date
    Apr 2021
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    Post Replace function

    Hey guys, Im quite new to Java and I do try to learn a bit and try to solve it by myself and I came across this questions regarding replacement strings. Can you guys help me with that please

    So here is the question:-

    The global replace function is a string-processing algorithm found in every word processor. Write a method that takes three String arguments: a document, a target string, and a replacement string. The method should replace every occurrence of the target string in the document with the replacement string.

    So, basically it needs to find a target string where the user put the sentence in and the user input the word that want to be replace and input what to change the word into.

    And here is the code I try and I couldn't figure it out

    public class Question1 {
    public static void Document(){


    public static final String targetString(String str){

    public static void replacementString(char oldString, char newString){
    oldString =

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
    Thanked 2,710 Times in 2,660 Posts

    Default Re: Replace function

    public static void replacementString(char oldString, char newString){
    A problem with the variables in that code is the a char is not a String. It is a single character. So oldString is not a String, it is a single character.

    I couldn't figure it out
    What is the replacement method supposed to do? Add some comments to the code describing what it is supposed to do. It is important that the description be in the code so that they are there when the code is being read.

    Please edit your post and wrap your code with code tags:


    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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