Java Exercises: 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.
Pictorial Presentation:

Sample Solution:
Java Code:
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Input the string:");
String str1 = br.readLine();
str1 = str1.replaceAll("java", "py_thon");
str1 = str1.replaceAll("python", "java");
str1 = str1.replaceAll("py_thon", "python");
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:
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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.
What is the difficulty level of this exercise?
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Java: Tips of the Day
Java: Anagrams
Generates all anagrams of a string.
public static List<String> anagrams(String input) { if (input.length() <= 2) { return input.length() == 2 ? Arrays.asList(input, input.substring(1) + input.substring(0, 1)) : Collections.singletonList(input); } return IntStream.range(0, input.length()) .mapToObj(i -> new SimpleEntry<>(i, input.substring(i, i + 1))) .flatMap(entry -> anagrams(input.substring(0, entry.getKey()) + input.substring(entry.getKey() + 1)) .stream() .map(s -> entry.getValue() + s)) .collect(Collectors.toList()); }
Ref: https://bit.ly/3rvAdAK
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