Java method for random Minecraft coordinate generation

RandomCoordGen.java

// This is a basic program on Java
//
// Try to modify and run it and check out
// the output in the terminal below
//
// Happy coding! :-)
import java.util.Random;

public class App {
	public int min;
	public int max;
	public Random r = new Random();
	
	//X:73728 - Z:36864
	//Max +/- for X = 36864
	//Max +/- for Z = 18432
	public static void main(String[] args) {
      App a = new App();
      int in = 73728;
      double c = 0.15;
      int low = 1000;
      int i = 10000;
      while (i >= 0) {
        System.out.println(a.randCoordGen(in,low,c));
        i--;
        }
    }
  
	public double randCoordGen(int axisSum, int lowerBound, double constraintPercentage) {
		int max = axisSum;
      	int lower = lowerBound;
		double constraint = constraintPercentage;
      	double vaildRange = 0;
		if(constraint != 0.0 && constraint >= 0.15 && lower != 0) {
			double bufferRange = max * constraint;
			double baseVaildRange = max - bufferRange;
			double curb = Math.round(Math.sqrt(bufferRange));
        	vaildRange = baseVaildRange - curb;
		} else {
			return 0; 
        }
		int min = (int)vaildRange / 2;
		int out = r.nextInt((int)vaildRange)-min;
      	if(out <= lower){
          out = out + lower;
        }
		double result = out;
		return result;
	}
  
}
      
		//double constraint = .5;
		//int max = 73728;
		//double bufferRange = max * constraint;
		//double baseVaildRange = max - bufferRange;
		//double curb = Math.round(Math.sqrt(bufferRange));
        //double vaildRange = baseVaildRange - curb;
		
		//System.out.println("Constraint = " + constraint);
		//System.out.println("Max = " + max);
		//System.out.println("Buffer Range = " + 	bufferRange);
		//System.out.println("Base Vaild Range = " + baseVaildRange);
		//System.out.println("curb = " + curb);
		//System.out.println("Vaild Range = " + vaildRange);
	

	
	
	
	/**
	 * Time: 3:54:07 PM | Date: 07-09-2021
	 * @author Galactic
	 * The method randCoordGen generates acceptable value ranges for Minecraft's coordinate system.
	 * In order to return proper values for use, axisSum must be the total length of the target axis. (max positive axis length * 2) 
	 * This method returns both positive and negative values.
	 * If useConstraint is true and 
	 * @see java.util.Random
	 * @param axisSum
	 * @param constraintPercentage
	 * @return result
	 */
	/**
  public static double randCoordGen(int axisSum, double constraintPercentage) {
		int max = axisSum;
		double constraint = constraintPercentage;
		if(constraint != 0.0 && constraint <= 0.15) {
			double bufferRange = max * constraint;
			double baseVaildRange = max - bufferRange;
			double curb = Math.round(Math.sqrt(bufferRange));
        	double vaildRange = baseVaildRange - curb;
		} else {
			return 0;
        }
		double min = vaildRange / 2;
		int out = r.nextInt(vaildRange)-min;
		double result = (double)out;
		return result;
	}
  **/


//int l = 10000;
//while (l >= 0) {
//	l--;
//	//System.out.println("xCords: " + randXCordGen(73728) + " zCords: " + randXCordGen(36864));
//}