repeat a particual function in java code example

Example 1: java repeat loop cycle for

for(int  i = 0; i < 10; i++) {
  	//your code
	if(random.nextInt(5) == 0) { i--; } //1 in 5 chance to repeat loop cycle
}

Example 2: how to write a method that returns a string that copies itself times n

public static String repeat(String s, int n) {    StringBuilder sb = new StringBuilder(str.length() * n);    for (int i = 0; i < n; i++)        sb.append(s);    return sb.toString();} public static void main(String[] args) {    System.out.println(repeat("ha", 5));}