package 중력구현; import java.awt.Color; import java.awt.Graphics; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.JButton; import javax.swing.JFrame; public class Gravitys extends JFrame{ private final int MAX_HEIGHT = 670; private int height = MAX_HEIGHT; private int velocity = 0; private int accel = 1; private int gravity = 1; private boolean isClicked = ..