Generate the experience tables on Minecraft Wiki

Test.java

package com.comphenix.testing;

class Test {
    private static int[] xpRequiredForNextLevel;
    private static int[] xpTotalToReachLevel;
    
    public static void main(String[] args) {
        initLookupTables(50);
        
        for (int i = 1; i < 41; i++) {
            System.out.println(xpTotalToReachLevel[i] + "," + xpRequiredForNextLevel[i - 1]);
        }
    }
    
    // Based on desht excellent ExperienceManager
    // https://github.com/desht/dhutils/blob/master/Lib/src/main/java/me/desht/dhutils/ExperienceManager.java
    private static void initLookupTables(int maxLevel) {
        xpRequiredForNextLevel = new int[maxLevel];
        xpTotalToReachLevel = new int[maxLevel];

        xpTotalToReachLevel[0] = 0;

        // Valid for MC 1.3 and later
        int incr = 17;
        for (int i = 1; i < xpTotalToReachLevel.length; i++) {
            xpRequiredForNextLevel[i - 1] = incr;
            xpTotalToReachLevel[i] = xpTotalToReachLevel[i - 1] + incr;
            if (i >= 30) {
                incr += 7;
            } else if (i >= 16) {
                incr += 3;
            }
        }
        xpRequiredForNextLevel[xpRequiredForNextLevel.length - 1] = incr;
    }
}