Task - String Programs - Secret Message

[akash-coded]

Breaking the Code

It's rudimentary, Watson!

In this program, we will be discussing various methods for replacing multiple characters in String. This can be done using the methods listed below:

• Using String.replace() method - returns a new string resulting from replacing all occurrences of old characters in the string with new characters.
  Syntax: public String replace(char oldch, char newch)
• Using replaceAll() method - replaces each substring of the string that matches the given regular expression with the given replace_str.
  Syntax: public String replaceAll(String regex, String replace_str)
• Using replaceFirst() method - replaces the first substring of this string that matches the given regular expression with the given replace_str.
  Syntax: public String replaceFirst(String regex, String replace_str)

The following string contains a secret message:

String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions"

In order to decipher the secret message, do the following in order:

1. Replace all occurrences of the letter 'z' with the letter 'e'. (Hint - You can use String.replace() function).
2. Replace all the digits with a space. (Hint - You can use the replaceAll() function to target and replace all the digits at once)
3. Replace the first occurrence of "java" with "obvious". (Hint - You can use replaceFirst() function)

WAP to decipher the coded message and print the decoded message in ALL CAPS.

[ratnadeepikavuddagiri]

`public class SecretMessage {

public static void main(String[] args) {
    String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
    System.out.println(secretMessage);
    String decodedMessage = (((secretMessage.replace('z','e')).replaceAll("[0-9]"," ")).replaceFirst("java","obvious")).toUpperCase();
    System.out.println(decodedMessage);
}    

}
`

[Batchusatyasri]

public class Stringfunctions {
public static void main(String[] args) {
String str = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
System.out.println(str);
String outputmsg = (((str.replace('z', 'e')).replaceAll("[0-9]", " ")).replaceFirst("java", "obvious"))
.toUpperCase();
System.out.println(outputmsg);

}

}

[Ashwesh09]

public class StringSecret {
    public static void main(String[] args) {
        String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        secretMessage = secretMessage.replace('z', 'e');
        secretMessage = secretMessage.replaceAll("[0-9]", " ");
        secretMessage = secretMessage.replaceFirst("java", "obvious");
        secretMessage = secretMessage.toUpperCase();
        System.out.println(secretMessage);
    }    
}

[lalit-ky]

public class SecretMessage {
    public static void main(String[] args) {
        String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        secretMessage = secretMessage.replace('z', 'e');
        secretMessage = secretMessage.replaceAll("[0-9]", " ");
        secretMessage = secretMessage.replaceFirst("java", "obvious");
        secretMessage = secretMessage.toUpperCase();
        System.out.println(secretMessage);
    }
}

[VigneshVishwa]

public class SecretMessage {
    public static void main(String[] args) {
        String str = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        str = str.replace('z', 'e');
        str = str.replaceAll("[0-9]", " ");
        str = str.replaceFirst("java", "obvious");
        str = str.toUpperCase();
        System.out.println(str);
    }
}

[Sarfinaa]

public class SecretMessage {

public static void main(String[] args) {
    String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
    System.out.println("Secret Message:"+secretMessage);
    String decodedMessage = (((secretMessage.replace('z','e')).replaceAll("[0-9]"," ")).replaceFirst("java","obvious")).toUpperCase();
    System.out.println("Decoded Message:"+decodedMessage);
}    
}

[Shubhi27]

package session13;

public class StringReplace {

    public static void main(String[] args) {
        String secretMsg = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        System.out.println(secretMsg);
        String decodedMsg = (((secretMsg.replace('z', 'e')).replaceAll("[0-9]", " ")).replaceFirst("java", "obvious"))
                .toUpperCase();
        System.out.println(decodedMsg);
    }
}

[shreiyarandive]

public class SecretMessage {
    public static void main(String[] args) {
        String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";

        String decodedSecretMessage = secretMessage.replace("z", "e").replaceAll("\\d", " ")
                .replaceFirst("java", "obvious").toUpperCase();

        System.out.println(decodedSecretMessage);
    }
}

[sruthi-15-sketch]

public class Main
{
public static void main(String[] args) {
String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
System.out.println("Decoded Message: "+secretMessage.replace('z','e').replaceAll("[0-9]"," ").replaceFirst("java","obvious").toUpperCase());
}
}

[Gaurav-Joshi-31]

public class SecretMessage {

public static void main(String[] args) {
    String inputMsg = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
    System.out.println(inputMsg);
    String outputMsg = (((inputMsg.replace('z', 'e')).replaceAll("[0-9]", " ")).replaceFirst("java", "obvious"))
            .toUpperCase();
    System.out.println(outputMsg);
}

}

[Khyati-tripathi]

package StringModule;

public class SecretString {

    public static void main(String[] args) {
        String str = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        str = str.replace('z', 'e');
        str = str.replaceAll("[0-9]", " ");
        str = str.replaceFirst("java", "obvious");
        System.out.println(str.toUpperCase());
    }

}

[PavanArvapally]

`import java.util.*;

public class SecretMessage {

public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);

    String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";

    System.out.println("Decoded message : " + secretMessage.replace('z', 'e').replaceAll("[0-9]", " ").replaceFirst("java", "obvious").toUpperCase());    
}

}
`

[preeti-max]

`package StringOperations;

public class StringReplace {
public static void main(String[] args) {
String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
System.out.println(secretMessage.replace('z','e').replaceAll("[0-9]", " ").replaceFirst("java", "obvious").toUpperCase());

}

}
`

[Amrit-Raj22]

package week3d3;

public class SecretMessage {

    public static void main(String[] args) {
        String msg = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        msg = msg.replace('z', 'e');
        msg = msg.replaceAll("[0-9]", " ");
        msg = msg.replaceFirst("java", "obvious");
        msg = msg.toUpperCase();
        System.out.println(msg);
    }

}

[Harshita-Joshi]

`package Strings;

public class DecodingMsg {

    public static void main(String[] args) {

        String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        secretMessage = secretMessage.replace('z', 'e');
        secretMessage = secretMessage.replaceAll("[0-9]+", " ");
        secretMessage = secretMessage.replaceFirst("java", "obvious");
        secretMessage = secretMessage.toUpperCase();
        System.out.println(secretMessage);    
    }
}
`

[aish955]

`public class StringFunctions {

public static void main(String[] args) {
    String str = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
    System.out.println(str);
    String encrypted = (((str.replace('z', 'e')).replaceAll("[0-9]", " ")).replaceFirst("java", "obvious"))
            .toUpperCase();
    System.out.println(encrypted);

}

}
`

[RohitN09]

package Week_4;

public class SecretMessage {
    public static void main(String[] args) {
        String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        secretMessage = secretMessage.replace('z', 'e');
        secretMessage = secretMessage.replaceAll("\\d+", " ");
        secretMessage = secretMessage.replaceFirst("java", "obvious");
        secretMessage = secretMessage.toUpperCase();
        System.out.println(secretMessage);
    }
}

[Snehil6197]

public class MyClass {
public static void main(String args[]) {
String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
System.out.println(secretMessage);
secretMessage=secretMessage.replace('z','e').replaceAll("\d"," ").replaceFirst("java","obvious").toUpperCase();
System.out.println(secretMessage);
}
}

[GantaGreeshma]

`public class SecreatMessage {
public static void main(String[] args) {
String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
System.out.println(secretMessage);
secretMessage = secretMessage.replace('z', 'e');
secretMessage = secretMessage.replaceAll("[0-9]", " ");
secretMessage = secretMessage.replaceFirst("java", "obvious");
System.out.println(secretMessage.toUpperCase());

}

}
`

[ShraddhaPenshanwar]

    public static void main(String[] args) {
        String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        secretMessage = secretMessage.replace('z', 'e');
        secretMessage = secretMessage.replaceAll("[0-9]", " ");
        secretMessage = secretMessage.replaceFirst("java", "obvious");
        secretMessage = secretMessage.toUpperCase();
        System.out.println(secretMessage);
    }    
}```

[rakeshGit419]

public class Secret {
    public static void main(String[] args) {
        String secretMsg = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9zssions";
        secretMsg= secretMsg.replace('z', 'e');
        secretMsg = secretMsg.replaceAll("[0-9]", " ");
        secretMsg = secretMsg.replaceFirst("java", "obvious");
        secretMsg= secretMsg.toUpperCase();
        System.out.println(secretMsg);
    }    
}

[mkaifahmed]

class Decode {
    public static void main(String[] args) {
        String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        System.out.println(secretMessage);
        String decodedMessage = secretMessage.replaceAll("z", "e").replaceAll("\\d", " ")
                .replaceFirst("java", "obvious").toUpperCase();
        System.out.println(decodedMessage);
    }
}

[Manvendra1097-eng]

package com.manvendra.message;

public class BreakingTheCode {

	public static void main(String[] args) {

		String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
		
		System.out.println("Secret Message : "+ secretMessage);
		
		String message = secretMessage.replace('z', 'e').replaceAll("[0-9]+", " ").replaceFirst("java", "obvious");
		
		System.out.println("\nActual message after decoding : "+message);
		
	}

}

[KanimozhiThandapani]

package com.src;

public class StringReplace {

	public static void main(String[] args) {
		String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
		String message = decodeMessage(secretMessage);
		System.out.println("The Secret Message is:"+message.toUpperCase());
	}

	private static String decodeMessage(String secretMessage) {
	        String regex = "\\d+";
		String decodedMessage = secretMessage.replace('z', 'e').replaceAll(regex, " ").replaceFirst("java", "obvious");
		System.out.println("decodedMessage:"+decodedMessage);
		return decodedMessage;
	}

}

[Trivikram-Sharma]

MessageDecode.java

package main;

import java.util.Scanner;

public class MessageDecode {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println("Please Enter the Secret Message:");
		Scanner sc = new Scanner(System.in);
		String secretMessage = sc.nextLine();
		secretMessage = secretMessage.replace('z', 'e');
		secretMessage = secretMessage.replaceAll("[0-9]", " ");
		secretMessage = secretMessage.replaceFirst("java","obvious");
		
		System.out.println("The Decoded Message is as shown below:");
		System.out.println(secretMessage.toUpperCase());
	}

}

[synghs67]

package com.breakingcode;

public class SecretMessage {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
         
		String sM = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
        System.out.println(sM);
      String dM = sM.replaceAll("z", "e").replaceAll("[0-9]", " ")
               .replaceFirst("java", "obvious").toUpperCase();
       System.out.println("After Decode" + "  " +dM);
        
        sM = sM.replace('z', 'e');
        sM = sM.replaceAll("[0-9]", " ");
        sM = sM.replaceAll("java", "obvious");
        sM = sM.toUpperCase();
        System.out.println("After Decode" + "  " +  sM);
        
        
		
	}

}

[Ishwar4342]

'''java
package com.example.replace;

public class Driven {
public static void main (String[] args) {
String secretMessage="Bzwarz!1It9is3java2whzn1you5arezusing3phonzs8during1thz9szssions";
System.out.println("Secret Message:"+ secretMessage);
String message=secretMessage.replace('z','e').replaceAll("[0-9]+","").replaceFirst("java","obvious");
System.out.println("\nDecoded Message:"+message);
}
}
'''

[Rahulupadhyay17]

'''java
package decipherproject;

public class Decipher {

public static void main(String[] args) {
	String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
	secretMessage = secretMessage.replace("z", "e");
	secretMessage = secretMessage.replaceAll("[0-9]", " ");
	secretMessage = secretMessage.replaceFirst("java", "obvious");
	secretMessage = secretMessage.toUpperCase();
	System.out.println(secretMessage);
	
}

}
'''

[SankalpHP]

package mypackage;

public class SecretMessage {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
 
		String crackit = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
	    System.out.println(crackit);
	    String decodedMessage = (crackit.replace('z', 'e').replaceAll("[0-9]"," ").replaceFirst("java","obvious")).toUpperCase();
	    System.out.println(decodedMessage);
		
	}

}
```java

[Jits1995]

package com.string.excercise;

public class MainApp {

	public static void main(String[] args) {
		
		String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
		String decodedMessage = secretMessage.replace('z', 'e').replaceAll("[0-9]", " ").replaceFirst("java", "obvious");
		System.out.println(decodedMessage.toUpperCase());

	}

}

[akshaychromule61]

package src.string.secret.program;

public class StringSecret {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String secretMessage = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
		System.out.println(secretMessage);
		System.out.println("Replace all occurrences of the letter 'z' with the letter 'e'");
		secretMessage = secretMessage.replace('z', 'e');
		System.out.println("Replace all the digits with a space");
		secretMessage = secretMessage.replaceAll("[0-9]", " ");
		System.out.println("Replace the first occurrence of \"java\" with \"obvious\".");
		secretMessage = secretMessage.replaceFirst("java", "obvious");
		System.out.println(secretMessage);
		
		//by using lambda expression
		String str1 = "Bzwarz!1It9is3java2whzn1you5arz4using3phonzs8during1thz9szssions";
		System.out.println((str1.replace("z", "e")).replaceAll("[0-9]", " ").replaceFirst("java", "obvious"));
	}

}