为什么不是我的Java动画的工作? [英] Why isn't my java animation working?
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问题描述
一切仍是当我想要的雨滴在屏幕上,直到他们见底向下移动,然后再做一遍。我用实现Runnable并有重绘其run方法。任何人都知道我缺少的是什么?
进口的javax.swing *。
进口java.awt中的*。
进口的java.util。*;公共类屏保继承JPanel实现Runnable {
私人最终静态INT FRAME_HEIGHT = 600;
私人最终静态INT FRAME_WIDTH = 600;
INT阴雨= 100;
INT rainGo = 1;
公共静态无效的主要(字串[] args){
JFrame的帧=新的JFrame();
frame.setSize(FRAME_WIDTH,FRAME_HEIGHT);
frame.add(新屏保());
frame.setVisible(真); }
公共屏幕(){
彩色背景;
背景=新的色彩(212202115);
的setBackground(背景);
}
保护无效paintComponent(图形G){
super.paintComponent方法(G);
彩色树;
颜色的叶子;
彩色的云;
颜色雨;
雨=新的色彩(0128255);
云计算=新的色彩(160160160);
叶=新的色彩(0,204,0);
树=新的色彩(102,0,0); g.setColor(树);
//g.drawLine(400,375,360,340);
g.fillRect(400,250,80,320);
g.setColor(叶子)
g.fillOval(340150,200,160);
g.setColor(云);
g.fillOval(10,5,550,100); 随机随机=新的随机();
INT rainX1 = random.nextInt(500)+ 40;
INT rainW1 = random.nextInt(30)+ 10;
INT rainX2 = random.nextInt(500)+ 40;
INT rainW2 = random.nextInt(30)+ 10;
INT rainX3 = random.nextInt(500)+ 40;
INT rainW3 = random.nextInt(30)+ 10;
INT rainX4 = random.nextInt(500)+ 40;
INT rainW4 = random.nextInt(30)+ 10; g.setColor(雨);
g.fillOval(rainX1,阴雨+ rainGo,rainW1,rainW1);
g.fillOval(rainX2,阴雨+ rainGo,rainW2,rainW2);
g.fillOval(rainX3,阴雨+ rainGo,rainW3,rainW3);
g.fillOval(rainX4,阴雨+ rainGo,rainW4,rainW4);
}
公共无效的run(){
而(真){
changeRain();
重绘();
}
}
公共无效changeRain(){
如果(雨季+ rainGo< FRAME_HEIGHT){
rainGo ++;
}
其他{
rainGo = 1;
}
}
}
解决方案
简短的回答:你没有启动发
来开始你的动画
完整的答案:使用的秋千并发机制之一,如秋千定时器动画。秋千计时器被设计成与Swing组件正确交互。
Everything is still when I want the raindrops to move down the screen until they hit the bottom and then do it again. I used implements runnable and have a run method that repaints it. Anyone know what I am missing?
import javax.swing.*;
import java.awt.*;
import java.util.*;
public class Screensaver extends JPanel implements Runnable{
private final static int FRAME_HEIGHT = 600;
private final static int FRAME_WIDTH = 600;
int rainY = 100;
int rainGo = 1;
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(FRAME_WIDTH,FRAME_HEIGHT);
frame.add(new Screensaver());
frame.setVisible(true);
}
public Screensaver(){
Color background;
background = new Color(212,202,115);
setBackground(background);
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Color tree;
Color leaves;
Color cloud;
Color rain;
rain = new Color(0,128,255);
cloud = new Color(160,160,160);
leaves = new Color(0,204,0);
tree = new Color(102,0,0);
g.setColor(tree);
//g.drawLine(400, 375, 360, 340);
g.fillRect(400, 250,80, 320 );
g.setColor(leaves);
g.fillOval(340,150 , 200, 160);
g.setColor(cloud);
g.fillOval(10,5,550,100);
Random random = new Random();
int rainX1 = random.nextInt(500) + 40;
int rainW1 = random.nextInt(30) + 10;
int rainX2 = random.nextInt(500) + 40;
int rainW2 = random.nextInt(30) + 10;
int rainX3 = random.nextInt(500) + 40;
int rainW3 = random.nextInt(30) + 10;
int rainX4 = random.nextInt(500) + 40;
int rainW4 = random.nextInt(30) + 10;
g.setColor(rain);
g.fillOval(rainX1, rainY + rainGo, rainW1, rainW1);
g.fillOval(rainX2, rainY+ rainGo, rainW2, rainW2);
g.fillOval(rainX3, rainY+ rainGo, rainW3, rainW3);
g.fillOval(rainX4, rainY+ rainGo, rainW4, rainW4);
}
public void run(){
while(true){
changeRain();
repaint();
}
}
public void changeRain(){
if(rainY+rainGo< FRAME_HEIGHT){
rainGo++;
}
else{
rainGo = 1;
}
}
}
解决方案
Short answer: You didn't start a Thread
to start your animation.
Full answer: Use one of Swings concurrency mechanisms such as a Swing Timer for animation. Swing Timers are designed to interact correctly with Swing components.
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