The 15 Puzzle, also called Game of Fifteen, is a sliding puzzle that consists of a frame of numbered square tiles in random order with one tile missing. To solve the puzzle, the players must place the tiles in order by making sliding moves that use the empty space.
import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
get link:https://bit.ly/34W6bNO