[Java first game] JFrame text box under the snake

Just touch the Java text box drawing knowledge point, and then can follow the teacher's reminders to do some simple game, to jframe deepen, the following on the greedy snake give some source code, in fact, the implementation of the code is not much, just a little processing can be understood, the following code has comments!

First Class Shake class

Import Java.awt.Color;

Import Java.awt.Graphics;

Import Java.util.Random;

public class Snake {

public int w;// radius

public int x, y;// spherical coordinates

Color co;// Colors

public int dir = 4;

Public Snake (int w,int x, int y, Color col) {

THIS.W = W;

this.x = x;

This.y = y;

this.co = col;

}

public void Draw (Graphics g) {

G.setcolor (CO);// Set the color of the fill

G.fillarc (Snakegame.off_w+x*w, Snakegame.off_h+y*w, W, w,0,360);// set Rectangle,4 parameters,xy coordinates, high heel width

}

}

The second class of Snakegame

Import java.awt.*;

Import Java.awt.event.KeyAdapter;

Import java.awt.event.KeyEvent;

Import java.util.*;

Import Javax.swing.JFrame;

public class Snakegame extends jframe{

Public final static int screen_w = 800,screen_h = 600;// set screen size

Public final static int off_w = 200,off_h = 100;// Sets the width height of the edit box from the edge of the screen

int key;// record up and down key keycode

Boolean ispress;// determine if the button is pressed

Graphics offg;// Brushes

Image img;// Canvas

arraylist<snake> Snakes = new arraylist<snake> ();// container for storing snakes

private static final Snakegame g = new Snakegame ();

public static Snakegame Get_game () {

return g;

}

Private Snakegame () {

SetBounds (100,100,screen_w,screen_h);// set screen size and start coordinates

Settitle ("Snakegame");// Set caption

SetVisible (TRUE);// Whether the setting is displayed

Setdefaultcloseoperation (exit_on_close);// Set small red fork

Addkeylistener (New Keyadapter () {// keyboard listener

@Override

public void keypressed (KeyEvent e) {// press keyboard event

TODO auto-generated Method Stub

Ispress = true;

Key = E.getkeycode ();

}

@Override

public void keyreleased (KeyEvent e) {// loose keyboard event

TODO auto-generated Method Stub

Ispress = false;

key =-1;

}

});

}

public int snakew = (screen_w-2*off_w)/40;// Set the size of a snake

Snake food;// Food

Snake head;// Snake head

public Random rd = new random ();

public void Paint (Graphics g) {

if (img = = null) {

img = createimage (screen_w,screen_h);

OFFG = Img.getgraphics ();

int xx = Rd.nextint ((screen_w-2*off_w)/snakew);

int yy = Rd.nextint ((screen_w-2*off_w)/snakew);

Food = new Snake (Snakew, XX, yy, color.red);// randomly produce foods

Head = new Snake (snakew, 0, 0, Color.yellow);

Snakes.add (head);// Add a snake head

}

Offg.setcolor (Color.White);

Offg.fillrect (0, 0, Screen_w, screen_h);

Offg.setcolor (Color.Black);

Offg.fillrect (Off_w,off_h, (Screen_w-2*off_w), (Screen_h-2*off_h));

judging the key press down to take effect

if (ispress) {

Snake head = snakes.get (0);// get a snake head

Switch (key) {// snake Head Direction change, up or down

Case 38:

if (head.dir! = 2) {

Head.dir = 1;

}

Break

Case 40:

if (head.dir! = 1) {

Head.dir = 2;

}

Break

Case 37:

if (head.dir! = 4) {

Head.dir = 3;

}

Break

Case 39:

if (head.dir! = 3) {

Head.dir = 4;

}

Break

}

}

Snake head = snakes.get (0);

after eating food, produce a food at random

if (head.x = = Food.x && Head.y = = food.y) {

Food.x = Rd.nextint ((screen_w-2*off_w)/snakew);

Food.y = Rd.nextint ((screen_w-2*off_w)/snakew);

Snakes.add (New Snake (Snakew, Head.x, Head.y, Color.Blue));

}// First Snake and then snake head

for (int i = Snakes.size ()-1; i > 0; i--) {

Snakes.get (i). x = Snakes.get (i-1). x;

Snakes.get (i). y = Snakes.get (i-1). Y;

}

Switch (head.dir) {

Case 1:

head.y--;

Break

Case 2:

head.y++;

Break

Case 3:

head.x--;

Break

Case 4:

head.x++;

Break

}

if (Head.x > 39) {

head.x = 0;

}else if (head.x < 0) {

Head.x = 39;

}

if (Head.y > 39) {

HEAD.Y = 0;

}else if (Head.y < 0) {

Head.y = 39;

}

Food.draw (OFFG);

for (int i = 0; i < snakes.size (); i++) {

Snakes.get (i). Draw (OFFG);

}

G.drawimage (Img,0,0,null);

Repaint ();/ /Redraw

try {

Thread.Sleep (150);

} catch (Interruptedexception e) {

TODO auto-generated Catch block

E.printstacktrace ();

}

}

}

The third class of Test class Maintest

public class Maintest {
public static void Main (string[] args) {
Snakegame g = Snakegame.get_game ();
}
}

[Java first game] JFrame text box under the snake