Java programming Exercises: Find and replace a word in a given string
Java Regular Expression: Exercise-13 with Solution
Write a Java program to find the word Python in a given string, if the word Python present in the string return Java otherwise return C++. Ignore case sensitive.
Sample Solution-1:
Java Code:
import java.util.*;
public class test {
public static void main(String[] args) {
String text = "python";
System.out.println("Original string: "+text);
System.out.println("New string: "+validate(text));
text = "JavaScript";
System.out.println("\nOriginal string: "+text);
System.out.println("New string: "+validate(text));
text = "PYTHON";
System.out.println("\nOriginal string: "+text);
System.out.println("New string: "+validate(text));
}
public static String validate(String text) {
String str = text.toLowerCase();
if (str.contains("python")) {
return "Java";
}
return "C++";
}
}
Sample Output:
Original string: python New string: Java Original string: JavaScript New string: C++ Original string: PYTHON New string: Java
Pictorial Presentation:
Flowchart :
Sample Solution-2:
Java Code:
public class test {
public static void main(String[] args) {
String text = "python";
System.out.println("Original string: "+text);
System.out.println("New string: "+validate(text));
text = "JavaScript";
System.out.println("\nOriginal string: "+text);
System.out.println("New string: "+validate(text));
text = "PYTHON";
System.out.println("\nOriginal string: "+text);
System.out.println("New string: "+validate(text));
}
public static String validate(String text) {
return text.matches("(?i).*(?<=python).*") ? "Java" : "C++";
}
}
Sample Output:
Original string: python New string: Java Original string: JavaScript New string: C++ Original string: PYTHON New string: Java
Flowchart :
Java Code Editor:
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