Java: Replace a string "python" with "java" and "java" with "python" in a given string

Java Basic: Exercise-230 with Solution

Write a Java program to replace a string "python" with "java" and "java" with "python" in a given string.

Input:

English letters (including single byte alphanumeric characters, blanks, symbols) are given on one line. The length of the input character string is 1000 or less.

Visual Presentation:

Sample Solution:

Java Code:

// Importing necessary classes for input/output operations
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;

// Main class named "Main"
class Main {
    
    // Main method to execute the program
    public static void main(String[] args) throws IOException {
        // Creating BufferedReader object to read input from the user
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        // Prompting the user to input a string
        System.out.println("Input the string:");
        
        // Reading the input string
        String str1 = br.readLine();
 
        // Replacing occurrences of "java" with "py_thon"
        str1 = str1.replaceAll("java", "py_thon");
        
        // Replacing occurrences of "python" with "java"
        str1 = str1.replaceAll("python", "java");
        
        // Replacing occurrences of "py_thon" with "python"
        str1 = str1.replaceAll("py_thon", "python");
        
        // Outputting the new string
        System.out.println("New string:");
        System.out.println(str1);
    }
} 

Sample Output:

Input the string:
python is more popular than java
New string:
java is more popular than python

Flowchart:

Java Code Editor:

Contribute your code and comments through Disqus.

Previous:Write a Java program that reads n digits (given) chosen from 0 to 9 and prints the number of combinations where the sum of the digits equals to another given number (s). Do not use the same digits in a combination.
Next: Write a Java program to find the difference between the largest integer and the smallest integer which are created by 8 numbers from 0 to 9. The number that can be rearranged shall start with 0 as in 00135668.