Java 按计划时间更改对象颜色
我试图模拟一个十字路口,到目前为止,我已经画了我的十字路口。现在我要开红绿灯。问题是我不能使我的圆圈每X秒将其颜色从绿色变为红色。 请帮帮我Java 按计划时间更改对象颜色,java,swing,graphics,jpanel,Java,Swing,Graphics,Jpanel,我试图模拟一个十字路口,到目前为止,我已经画了我的十字路口。现在我要开红绿灯。问题是我不能使我的圆圈每X秒将其颜色从绿色变为红色。 请帮帮我 import java.awt.Color; import javax.jws.Oneway; import javax.swing.JFrame; public class Main { public static void main(String[] args) { MyMap map = new MyMap();
import java.awt.Color;
import javax.jws.Oneway;
import javax.swing.JFrame;
public class Main {
public static void main(String[] args) {
MyMap map = new MyMap();
JFrame f = new JFrame("Broadway Intersection");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
map.setBackground(Color.white);
f.add(map);
f.setSize(1366,738);
f.setVisible(true);
}
}
My Map class
import java.awt.Color;
import java.awt.Graphics;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JPanel;
public class MyMap extends JPanel {
public void paintComponent(final Graphics g) {
super.paintComponent(g);
g.setColor(Color.GREEN);
g.fillRect(0, 0, 500, 250); // stanga sus
g.fillRect(900, 0, 500, 250); // dreapta sus
g.fillRect(0, 500, 500, 250);// stanga jos
g.fillRect(900, 500, 500, 250); // dreapta jos
g.setColor(Color.GRAY);
g.fillRect(500, 0, 400, 900);
g.fillRect(0, 250, 500, 250);
g.fillRect(900, 250, 500, 250);
g.setColor(Color.WHITE);
g.fillRect(695, 0, 5, 100);// linii verticale
g.fillRect(695, 150, 5, 100);
g.fillRect(695, 500, 5, 100);
g.fillRect(695, 650, 5, 50);
g.fillRect(0, 370, 50, 5);
g.fillRect(100, 370, 100, 5); // linii orizontale
g.fillRect(250, 370, 100, 5);
g.fillRect(400, 370, 100, 5);
g.fillRect(900, 370, 100, 5);
g.fillRect(1050, 370, 100, 5);
g.fillRect(1200, 370, 100, 5);
Timer timer = new Timer();
boolean semaphore =true;
timer.schedule(new TimerTask() {
@Override
public void run() {
g.setColor(Color.RED);
g.fillOval(700, 400, 20, 20);
System.out.println("tic tac");
}
}, 0, 5000);
g.setColor(Color.GREEN);
g.fillOval(700, 400, 20, 20);
}
}
我在中间有一个圆圈,我想改变它的颜色,然后我将开始画我的交通灯:D感谢所有帮助我的人。尝试将
计时器
放在油漆组件()之外
并将颜色
对象作为类成员,以便可以在计时器
和绘图组件
中访问该对象。当计时器达到其标记时,它会更改颜色,然后调用repaint
。尝试类似的方法(未测试)
编辑2:保持交替
编辑3:不同的时间延迟
看看Swing计时器:
import java.awt.Color;
import java.awt.Graphics;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JPanel;
public class MyMap extends JPanel {
Color color = Color.GREEN; <-- class member
public MyMap(){
Timer timer = new Timer();
boolean semaphore =true; <-- not sure what this is for so I left it
timer.schedule(new TimerTask() {
@Override
public void run() {
color = Color.RED; <-- change color
repaint(); <-- repaint();
System.out.println("tic tac");
}
}, 0, 5000);
}
public void paintComponent(final Graphics g) {
super.paintComponent(g);
g.setColor(Color.GREEN);
g.fillRect(0, 0, 500, 250); // stanga sus
g.fillRect(900, 0, 500, 250); // dreapta sus
g.fillRect(0, 500, 500, 250);// stanga jos
g.fillRect(900, 500, 500, 250); // dreapta jos
g.setColor(Color.GRAY);
g.fillRect(500, 0, 400, 900);
g.fillRect(0, 250, 500, 250);
g.fillRect(900, 250, 500, 250);
g.setColor(Color.WHITE);
g.fillRect(695, 0, 5, 100);// linii verticale
g.fillRect(695, 150, 5, 100);
g.fillRect(695, 500, 5, 100);
g.fillRect(695, 650, 5, 50);
g.fillRect(0, 370, 50, 5);
g.fillRect(100, 370, 100, 5); // linii orizontale
g.fillRect(250, 370, 100, 5);
g.fillRect(400, 370, 100, 5);
g.fillRect(900, 370, 100, 5);
g.fillRect(1050, 370, 100, 5);
g.fillRect(1200, 370, 100, 5);
g.setColor(color); <--- just use your color variable
g.fillOval(700, 400, 20, 20);
}
}
Timer timer = new Timer(5000, new ActionListener(){
public void actionPerformed(ActionEvent e){
color = Color.GREEN;
repaint();
}
});
timer.setRepeats(false);
timer.start();
Timer timer = new Timer(5000, new ActionListener(){
public void actionPerformed(ActionEvent e){
if (color.equals(Color.GREEN){
color = Color.RED;
} else {
color = Color.GREEN;
}
repaint();
}
});
timer.start();
Color color = Color.GREEN;
Timer timer;
public MyMap() {
timer = null;
timer = new Timer(5000, new ActionListener(){
public void actionPerformed(ActionEvent e) {
if (color.equals(Color.GREEN)) {
color = Color.RED;
timer.setDelay(2000);
} else {
color = Color.GREEN;
timer.setDelay(8000);
}
repaint();
}
});
timer.start();
}