How to replace multiple words in a single string in Java?

Question

I'm writing a program that will replace multiple words in a single string. I'm using this code but it is replacing word but giving result in two different lines. I want multiple words replaced and output in one single line.

import java.util.*;
public class ReplaceString {
    public static void main(String[] args) {
        new ReplaceString().run();
    }

    public void run()
    {

        System.out.println("Input String:\n");////
        Scanner keyboardScanner = new Scanner(System.in);/////
        String inString = keyboardScanner.nextLine();/////
        String strOutput = inString.replace("call me","cm");
        System.out.println(strOutput);

        String strOutput1 = inString.replace("as soon as possible","asap");
        System.out.println(strOutput1);      

    }
}

Answer 1

If you want to do it in a single statement you can use:

String strOutput = inString.replace("call me","cm").replace("as soon as possible","asap");

Alternatively, if you have many such replacements, it might be wiser to store them in some kind of data structure such as a 2d-array. For example:

//array to hold replacements
String[][] replacements = {{"call me", "cm"}, 
                           {"as soon as possible", "asap"}};

//loop over the array and replace
String strOutput = inString;
for(String[] replacement: replacements) {
    strOutput = strOutput.replace(replacement[0], replacement[1]);
}

System.out.println(strOutput);

Answer 2

Of course it prints two lines: you have two print statements. Use this code:

import java.util.*;

public class ReplaceString {
    public static void main(String[] args) {
        new ReplaceString().run();
    }

    public void run()
    {

        System.out.println("Input String:\n");////
        Scanner keyboardScanner = new Scanner(System.in);/////
        String inString = keyboardScanner.nextLine();/////
        String shortMessage = shortifyMessage(inString);
        System.out.println(shortMessage);
    }

    public String shortifyMessage(String str)
    {
        String s = str;
        s = s.replace("call me", "cm");
        s = s.replace("as soon as possible", "asap");
        // Add here some other replacements

        return s;
    }
}

Answer 3

Now you can use StringUtils in commons-lang3 package.

<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
  <groupId>org.apache.commons</groupId>
  <artifactId>commons-lang3</artifactId>
  <version>3.7</version>
</dependency>

Code like below:

strOutput = StringUtils.replaceEach(inString, new String[]{"call me", "as soon as possible"}, new String[]{"cm", "asap"});