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給段最簡(jiǎn)單的java代碼 讓我新手看一下
最簡(jiǎn)單的java代碼肯定就是這個(gè)了，如下：
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public class MyFirstApp
{
public static void main(String[] args)
{
System.out.print("Hello world");
}
}
“hello world”就是應(yīng)該是所有學(xué)java的新手看的第一個(gè)代碼了。如果是零基礎(chǔ)的新手朋友們可以來(lái)我們的java實(shí)驗(yàn)班試聽(tīng)，有免費(fèi)的試聽(tīng)課程幫助學(xué)習(xí)java必備基礎(chǔ)知識(shí)，有助教老師為零基礎(chǔ)的人提供個(gè)人學(xué)習(xí)方案，學(xué)習(xí)完成后有考評(píng)團(tuán)進(jìn)行專(zhuān)業(yè)測(cè)試，幫助測(cè)評(píng)學(xué)員是否適合繼續(xù)學(xué)習(xí)java，15天內(nèi)免費(fèi)幫助來(lái)報(bào)名體驗(yàn)實(shí)驗(yàn)班的新手快速入門(mén)java，更好的學(xué)習(xí)java！
Java寫(xiě)一套漂亮的代碼，哪些設(shè)計(jì)模式比較常用
對(duì)于代碼結(jié)構(gòu)上，看起來(lái)漂亮起作用的模式，常用的策略模式，工廠模式，裝飾模式和觀察者模式吧。但也看情景，生搬硬套會(huì)顯得不夠簡(jiǎn)潔的。
求java代碼怎么做一個(gè)好看的貪吃蛇
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
public class GreedSnake implements KeyListener{
JFrame mainFrame;
Canvas paintCanvas;
JLabel labelScore;
SnakeModel snakeModel = null;
public static final int canvasWidth = 200;
public static final int canvasHeight = 300;
public static final int nodeWidth = 10;
public static final int nodeHeight = 10;
public GreedSnake() {
mainFrame = new JFrame("GreedSnake");
Container cp = mainFrame.getContentPane();
labelScore = new JLabel("Score:");
cp.add(labelScore, BorderLayout.NORTH);
paintCanvas = new Canvas();
paintCanvas.setSize(canvasWidth+1,canvasHeight+1);
paintCanvas.addKeyListener(this);
cp.add(paintCanvas, BorderLayout.CENTER);
JPanel panelButtom = new JPanel();
panelButtom.setLayout(new BorderLayout());
JLabel labelHelp;
labelHelp = new JLabel("PageUp, PageDown for speed;", JLabel.CENTER);
panelButtom.add(labelHelp, BorderLayout.NORTH);
labelHelp = new JLabel("ENTER or R or S for start;", JLabel.CENTER);
panelButtom.add(labelHelp, BorderLayout.CENTER);
labelHelp = new JLabel("SPACE or P for pause",JLabel.CENTER);
panelButtom.add(labelHelp, BorderLayout.SOUTH);
cp.add(panelButtom,BorderLayout.SOUTH);
mainFrame.addKeyListener(this);
mainFrame.pack();
mainFrame.setResizable(false);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setVisible(true);
begin();
}
public void keyPressed(KeyEvent e){
int keyCode = e.getKeyCode();
if (snakeModel.running)
switch(keyCode){
case KeyEvent.VK_UP:
snakeModel.changeDirection(SnakeModel.UP);
break;
case KeyEvent.VK_DOWN:
snakeModel.changeDirection(SnakeModel.DOWN);
break;
case KeyEvent.VK_LEFT:
snakeModel.changeDirection(SnakeModel.LEFT);
break;
case KeyEvent.VK_RIGHT:
snakeModel.changeDirection(SnakeModel.RIGHT);
break;
case KeyEvent.VK_ADD:
case KeyEvent.VK_PAGE_UP:
snakeModel.speedUp();
break;
case KeyEvent.VK_SUBTRACT:
case KeyEvent.VK_PAGE_DOWN:
snakeModel.speedDown();
break;
case KeyEvent.VK_SPACE:
case KeyEvent.VK_P:
snakeModel.changePauseState();
break;
default:
}
if (keyCode == KeyEvent.VK_R ||
keyCode == KeyEvent.VK_S ||
keyCode == KeyEvent.VK_ENTER){
snakeModel.running = false;
begin();
}
}
public void keyReleased(KeyEvent e){
}
public void keyTyped(KeyEvent e){
}
void repaint(){
Graphics g = paintCanvas.getGraphics();
//draw background
g.setColor(Color.WHITE);
g.fillRect(0,0,canvasWidth,canvasHeight);
// draw the snake
g.setColor(Color.BLACK);
LinkedList na = snakeModel.nodeArray;
Iterator it = na.iterator();
while(it.hasNext()){
Node n = (Node)it.next();
drawNode(g,n);
}
// draw the food
g.setColor(Color.RED);
Node n = snakeModel.food;
drawNode(g,n);
updateScore();
}
private void drawNode(Graphics g, Node n){
g.fillRect(n.x*nodeWidth,
n.y*nodeHeight,
nodeWidth-1,
nodeHeight-1);
}
public void updateScore(){
String s = "Score: " + snakeModel.score;
labelScore.setText(s);
}
void begin(){
if (snakeModel == null || !snakeModel.running){
snakeModel = new SnakeModel(this,
canvasWidth/nodeWidth,
canvasHeight/nodeHeight);
(new Thread(snakeModel)).start();
}
}
public static void main(String[] args){
GreedSnake gs = new GreedSnake();
}
}
///////////////////////////////////////////////////
// 文件2
///////////////////////////////////////////////////
import java.util.*;
import javax.swing.*;
class SnakeModel implements Runnable{
GreedSnake gs;
boolean[][] matrix;
LinkedList nodeArray = new LinkedList();
Node food;
int maxX;
int maxY;
int direction = 2;
boolean running = false;
int timeInterval = 200;
double speedChangeRate = 0.75;
boolean paused = false;
int score = 0;
int countMove = 0;
// UP and DOWN should be even
// RIGHT and LEFT should be odd
public static final int UP = 2;
public static final int DOWN = 4;
public static final int LEFT = 1;
public static final int RIGHT = 3;
public SnakeModel(GreedSnake gs, int maxX, int maxY){
this.gs = gs;
this.maxX = maxX;
this.maxY = maxY;
// initial matirx
matrix = new boolean[maxX][];
for(int i=0; imaxX; ++i){
matrix = new boolean[maxY];
Arrays.fill(matrix,false);
}
// initial the snake
int initArrayLength = maxX 20 ? 10 : maxX/2;
for(int i = 0; i initArrayLength; ++i){
int x = maxX/2+i;
int y = maxY/2;
nodeArray.addLast(new Node(x, y));
matrix[x][y] = true;
}
food = createFood();
matrix[food.x][food.y] = true;
}
public void changeDirection(int newDirection){
if (direction % 2 != newDirection % 2){
direction = newDirection;
}
}
public boolean moveOn(){
Node n = (Node)nodeArray.getFirst();
int x = n.x;
int y = n.y;
switch(direction){
case UP:
y--;
break;
case DOWN:
y++;
break;
case LEFT:
x--;
break;
case RIGHT:
x++;
break;
}
if ((0 = x x maxX) (0 = y y maxY)){
if (matrix[x][y]){
if(x == food.x y == food.y){
nodeArray.addFirst(food);
int scoreGet = (10000 - 200 * countMove) / timeInterval;
score += scoreGet 0? scoreGet : 10;
countMove = 0;
food = createFood();
matrix[food.x][food.y] = true;
return true;
}
else
return false;
}
else{
nodeArray.addFirst(new Node(x,y));
matrix[x][y] = true;
n = (Node)nodeArray.removeLast();
matrix[n.x][n.y] = false;
countMove++;
return true;
}
}
名稱(chēng)欄目：Java好看的代碼,java最浪漫的編程代碼
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