29: 2月 2015

// resize image + make imagebutton
JPanel panel = new JPanel();
panel.setLayout(null); // set 了layout是null後必需調用setBounds
panel.setBounds(0, 0, 200 , 200); // 參數1: x座標; 2:y座標; 3:width; 4:height
ImageIcon img = new ImageIcon(getClass().getResource("/lam/images/1.jpg"));
// resize img width and height to 100,100
Image image = img.getImage();
Image newimg = image.getScaledInstance(100, 100, java.awt.Image.SCALE_SMOOTH);
img = new ImageIcon(newimg);
// add image to button
JButton btn = new JButton();
btn.setBorder(LineBorder.createGrayLineBorder());
btn.setIcon(img);
btn.setBounds(0, 0, 150, 120);
panel.add(btn);

字母貪食蛇小遊戲－ Object、GUI、KeyListener的應用。

/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package snakegui;
/**
*
* @author kongyinlam
*/
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
public class SnakeGUI {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
SnakeGame sg = new SnakeGame(20,30);
sg.play('w');
}
}
class SnakeGame implements KeyListener{
Board b;
ArrayList<Token> tokens;
int py, px;
boolean isEaten=false;
public SnakeGame(int h, int w){
b = new Board(h, w, this);
tokens = new ArrayList<>();
for(int i=0; i<4; i++){
Token token = new Token(this, b, tokens.size());
token.setInitPos();
tokens.add(token);
}
}
public void play(char key){
b.clearBoard();
if(isEaten) eaten();
for(Token tokenss: tokens)
tokenss.MoveToken(key);
b.paintBoard();
}
public void eaten(){
isEaten = false;
Token token = new Token(this, b, tokens.size());
token.y = tokens.get(tokens.size()-1).y;
token.x = tokens.get(tokens.size()-1).x;
token.c = tokens.get(0).c;
tokens.add(token);
tokens.get(0).y = new Random().nextInt(b.h-3)+1;
tokens.get(0).x = new Random().nextInt(b.w-3)+1;
tokens.get(0).c = (char)(new Random().nextInt(26)+97);
}
@Override
public void keyTyped(KeyEvent e) {
try{
char key = (""+e.getKeyChar()).toLowerCase().charAt(0);
if(key=='w'||key=='s'||key=='a'||key=='d')
play(key);
}
catch(Exception ee){}
}
@Override
public void keyPressed(KeyEvent e) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void keyReleased(KeyEvent e) {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
}
class Token{
SnakeGame sg;
Board b;
int id;
int y,x;
char c;
public Token(SnakeGame sg, Board b, int id){
this.sg = sg;
this.b = b;
this.id = id;
c = (char)(new Random().nextInt(26)+97);
}
public void setInitPos(){
if(id==0){
y = 10;
x = 10;
}
else {
y = b.h-4+id;
x = b.w-4;
}
}
public void MoveToken(char k){
if(id!=0){
if(id==1){
sg.py = y;
sg.px = x;
switch(k){
case 'w' : y-=1; break;
case 's' : y+=1; break;
case 'd' : x+=1; break;
case 'a' : x-=1; break;
}
if(b.layout[y][x]=='*') JOptionPane.showMessageDialog(null, "GameOver", "Result", JOptionPane.INFORMATION_MESSAGE);
else if(y==sg.tokens.get(0).y&&x==sg.tokens.get(0).x){
sg.isEaten=true;
}
}
else{
int ty = y;
int tx = x;
y = sg.py;
x = sg.px;
sg.py = ty;
sg.px = tx;
}
}
b.layout[y][x] = c;
}
}
class Board{
JFrame f;
int h,w;
char[][] layout;
public Board(int h, int w, SnakeGame sg){
this.h = h;
this.w = w;
f = new JFrame();
f.setSize(w*20, h*30);
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
f.setLocation(dim.width/2-f.size().width/2, dim.height/2-f.size().height/2);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLayout(new GridBagLayout());
f.addKeyListener(sg);
layout = new char [h][w];
}
public void clearBoard(){
f.getContentPane().removeAll();
for(int i=0; i<h; i++){
for(int j=0; j<w; j++){
if(i==0||i==h-1||j==0||j==w-1) layout[i][j]='*';
else layout[i][j]=' ';
}
}
}
public void paintBoard(){
for(int i=0; i<h; i++){
for(int j=0; j<w; j++){
GridBagConstraints gbc = new GridBagConstraints();
JLabel lb = new JLabel(""+layout[i][j]);
gbc.gridx = j;
gbc.gridy = i;
gbc.ipadx = 10;
gbc.ipady = 2;
gbc.anchor = GridBagConstraints.CENTER;
f.add(lb, gbc);
}
}
f.getContentPane().repaint();
f.setVisible(true);
}
}

29

2015年2月19日星期四

[Java] resize image + imagebutton

2015年2月9日星期一

[java] 字母貪食蛇小遊戲－ Object、GUI、keylistener的應用

2015年2月19日 星期四

[Java] resize image + imagebutton

2015年2月9日 星期一

[java] 字母貪食蛇小遊戲 － Object、GUI、keylistener的應用

2015年2月19日星期四

2015年2月9日星期一

[java] 字母貪食蛇小遊戲－ Object、GUI、keylistener的應用