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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		String maxValue  = "81";
		int    maxLength = maxValue.length();
 
		String v1 = "1";
		String v2 = "   " + v1;
 
		System.out.printf("%" + maxLength + "d", v2, v2.substring()-maxLength);
 
	}
}

Main.java:19: error: no suitable method found for substring(no arguments)
		System.out.printf("%" + maxLength + "d", v2, v2.substring()-maxLength);
		                                               ^
    method String.substring(int) is not applicable
      (actual and formal argument lists differ in length)
    method String.substring(int,int) is not applicable
      (actual and formal argument lists differ in length)
1 error

Standard output is empty