Java String Exercises: Concatenate a given string with itself of a given number of times
Java String: Exercise-106 with Solution
Write a Java program to concatenate a given string with itself of a given number of times.
Sample Solution:
Java Code:
import java.util.Arrays;
public class Main {
public static void main(String[] args) {
String str1 = "PHP";
System.out.println("Original string: "+str1);
String resultV1 = repeat_str(str1, 7);
System.out.println("\nAfter repeating 7 times: "+resultV1);
}
public static String repeat_str(String str1, int n) {
if (str1 == null || str1.isEmpty()) {
return "";
}
if (n <= 0) {
return str1;
}
if (Integer.MAX_VALUE / n < str1.length()) {
throw new OutOfMemoryError("Maximum size of a String will be exceeded");
}
StringBuilder x = new StringBuilder(str1.length() * n);
for (int i = 1; i <= n; i++) {
x.append(str1);
}
return x.toString();
}
}
Sample Output:
Original string: PHP After repeating 7 times: PHPPHPPHPPHPPHPPHPPHP
Pictorial Presentation:
Flowchart:
Java Code Editor:
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
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