Java drawString()不是';I don’我的游戏没有结果
我正在使用Java drawString()不是';I don’我的游戏没有结果,java,swing,graphics,Java,Swing,Graphics,我正在使用drawString()在字符串上写入文本,但没有显示任何内容。我将颜色设置为白色,并将坐标设置为(100100)。还有什么是我做错的吗 import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.util.ArrayList; impor
drawString()
在字符串上写入文本,但没有显示任何内容。我将颜色设置为白色,并将坐标设置为(100100)。还有什么是我做错的吗
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.util.Random;
import javax.swing.JPanel;
public class Screen extends JPanel implements Runnable {
private static final long serialVersionUID = 1L;
public static final int WIDTH = 800, HEIGHT = 800;
private Thread thread;
private boolean running = false;
private BodyPart b;
private ArrayList<BodyPart> snake;
private Apple apple;
private ArrayList<Apple> apples;
private Random r;
private int xCoor = 20, yCoor = 20;
private int size = 10;
private int score = 0;
private boolean right = true, left = false, up = false, down = false;
private int ticks = 0;
private Key key;
public Screen() {
setFocusable(true);
key = new Key();
addKeyListener(key);
setPreferredSize(new Dimension(WIDTH, HEIGHT));
r = new Random();
snake = new ArrayList<BodyPart>();
apples = new ArrayList<Apple>();
start();
}
public void reset() {
snake.clear();
apples.clear();
xCoor = 20;
yCoor = 20;
size = 10;
score = 0;
running = true;
}
public void tick() {
if(snake.size() == 0) {
b = new BodyPart(xCoor, yCoor, 20);
snake.add(b);
}
if(apples.size() == 0) {
int xCoor = r.nextInt(40);
int yCoor = r.nextInt(40);
apple = new Apple(xCoor, yCoor, 20);
apples.add(apple);
}
for(int i = 0; i < apples.size(); i++) {
if(xCoor == apples.get(i).getxCoor() && yCoor == apples.get(i).getyCoor()) {
size++;
apples.remove(i);
score += 10;
i--;
}
}
for(int i = 0; i < snake.size(); i++) {
if(xCoor == snake.get(i).getxCoor() && yCoor == snake.get(i).getyCoor()) {
if(i != snake.size() - 1) {
reset();
}
}
}
if(xCoor < 0) xCoor = 40;
if(xCoor > 40) xCoor = 0;
if(yCoor < 0) yCoor = 40;
if(yCoor > 40) yCoor = 0;
ticks++;
if(ticks > 250000) {
if(right) xCoor++;
if(left) xCoor--;
if(up) yCoor--;
if(down) yCoor++;
ticks = 185000;
b = new BodyPart(xCoor, yCoor, 20);
snake.add(b);
if(snake.size() > size) {
snake.remove(0);
}
}
}
public void paint(Graphics g) {
g.clearRect(0, 0, WIDTH, HEIGHT);
g.drawString("Score: " + score, 100, 100);
g.setColor(Color.WHITE);
g.setColor(new Color(20, 50, 0));
g.fillRect(0, 0, WIDTH, HEIGHT);
g.setColor(Color.BLACK);
for(int i = 0; i < WIDTH / 20; i++) {
g.drawLine(i * 20, 0, i * 20, HEIGHT);
}
for(int i = 0; i < HEIGHT / 20; i++) {
g.drawLine(0, i * 20, WIDTH, i * 20);
}
for(int i = 0; i < snake.size(); i++) {
snake.get(i).draw(g);
}
for(int i = 0; i < apples.size(); i++) {
apples.get(i).draw(g);
}
}
public void start() {
running = true;
thread = new Thread(this, "Game Loop");
thread.start();
}
public void stop() {
running = false;
try {
thread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public void run() {
while(running) {
tick();
repaint();
}
}
private class Key implements KeyListener {
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
if(key == KeyEvent.VK_RIGHT && !left) {
up = false;
down = false;
right = true;
}
if(key == KeyEvent.VK_LEFT && !right) {
up = false;
down = false;
left = true;
}
if(key == KeyEvent.VK_UP && !down) {
left = false;
right = false;
up = true;
}
if(key == KeyEvent.VK_DOWN && !up) {
left = false;
right = false;
down = true;
}
}
}
导入java.awt.Color;
导入java.awt.Dimension;
导入java.awt.Graphics;
导入java.awt.event.KeyEvent;
导入java.awt.event.KeyListener;
导入java.util.ArrayList;
导入java.util.Random;
导入javax.swing.JPanel;
公共类屏幕扩展JPanel实现可运行{
私有静态最终长serialVersionUID=1L;
公共静态最终内部宽度=800,高度=800;
私有线程;
私有布尔运行=false;
私人机构乙部;
私家蛇;
私人苹果;
私人ArrayList苹果;
私有随机r;
私有int xCoor=20,yCoor=20;
私有整数大小=10;
私人智力得分=0;
私有布尔右=真,左=假,上=假,下=假;
私有整数=0;
私钥;
公共屏幕(){
设置聚焦(真);
键=新键();
addKeyListener(键);
setPreferredSize(新尺寸(宽度、高度));
r=新随机数();
snake=newarraylist();
苹果=新的ArrayList();
start();
}
公共无效重置(){
snake.clear();
苹果;
xCoor=20;
yCoor=20;
尺寸=10;
得分=0;
运行=真;
}
公共空白勾号(){
if(snake.size()==0){
b=新车身部件(xCoor,yCoor,20);
蛇.加入(b);
}
if(apples.size()==0){
int xCoor=r.nextInt(40);
int yCoor=r.nextInt(40);
苹果=新苹果(xCoor,yCoor,20);
苹果。添加(苹果);
}
对于(int i=0;i40)xCoor=0;
如果(yCoor<0)yCoor=40;
如果(yCoor>40)yCoor=0;
ticks++;
如果(滴答声>250000){
if(右)xCoor++;
如果(左)xCoor--;
如果(向上)yCoor--;
如果(向下)yCoor++;
蜱=185000;
b=新车身部件(xCoor,yCoor,20);
蛇.加入(b);
if(snake.size()>size){
snake.remove(0);
}
}
}
公共空间涂料(图g){
g、 clearRect(0,0,宽度,高度);
g、 抽绳(“分数:+分数,100,100);
g、 setColor(Color.WHITE);
g、 setColor(新颜色(20,50,0));
g、 fillRect(0,0,宽度,高度);
g、 设置颜色(颜色为黑色);
对于(int i=0;i
有些东西的顺序不正确。在绘制时,需要按正确的顺序绘制,否则会在其他对象的顶部绘制
因此,在代码中,paint()
方法的前5行应该是这样的…(注意相同的代码,但顺序不同)
你需要先画背景色。然后你可以在上面画字符串。你做事的顺序非常重要,记住,在Swing中画画就像在纸上画画,如果你先画文本,然后在上面画画,它将不再可见
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(new Color(20, 50, 0));
g.fillRect(0, 0, WIDTH, HEIGHT);
g.setColor(Color.BLACK);
for (int i = 0; i < WIDTH / 20; i++) {
g.drawLine(i * 20, 0, i * 20, HEIGHT);
}
for (int i = 0; i < HEIGHT / 20; i++) {
g.drawLine(0, i * 20, WIDTH, i * 20);
}
for (int i = 0; i < snake.size(); i++) {
snake.get(i).draw(g);
}
for (int i = 0; i < apples.size(); i++) {
apples.get(i).draw(g);
}
g.setColor(Color.WHITE);
g.drawString("Score: " + score, 100, 100);
}
@覆盖
受保护组件(图形g){
超级组件(g);
g、 setColor(新颜色(20,50,0));
g、 fillRect(0,0,宽度,高度);
g、 设置颜色(颜色为黑色);
对于(int i=0;i
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(new Color(20, 50, 0));
g.fillRect(0, 0, WIDTH, HEIGHT);
g.setColor(Color.BLACK);
for (int i = 0; i < WIDTH / 20; i++) {
g.drawLine(i * 20, 0, i * 20, HEIGHT);
}
for (int i = 0; i < HEIGHT / 20; i++) {
g.drawLine(0, i * 20, WIDTH, i * 20);
}
for (int i = 0; i < snake.size(); i++) {
snake.get(i).draw(g);
}
for (int i = 0; i < apples.size(); i++) {
apples.get(i).draw(g);
}
g.setColor(Color.WHITE);
g.drawString("Score: " + score, 100, 100);
}