如何在Applet画布上制作彩绘对象？
import java.awt.*;
import java.applet.*;
public class rain extends Applet
{
int i=0,j=0,k=0;
AudioClip ac;
public void init()
{
ac=getAudioClip(getCodeBase(),"rain.wav");
ac.play();
}
public void paint(Graphics g)
{
setBackground(Color.darkGray);
g.setColor(Color.gray);
g.fillOval(100,100,75,25);
g.fillOval(115,115,75,25);
g.fillOval(115,85,75,25);
g.fillOval(165,75,75,25);
g.fillOval(165,125,75,25);
g.fillOval(205,115,75,25);
g.fillOval(205,85,75,25);
g.fillOval(220,100,75,25);
g.fillOval(160,95,80,35);
g.setColor(Color.gray);
g.fillOval(300,100,75,25);
g.fillOval(315,115,75,25);
g.fillOval(315,85,75,25);
g.fillOval(365,75,75,25);
g.fillOval(365,125,75,25);
g.fillOval(405,115,75,25);
g.fillOval(405,85,75,25);
g.fillOval(420,100,75,25);
g.fillOval(360,95,80,35);
g.setColor(Color.gray);
g.fillOval(500,100,75,25);
g.fillOval(515,115,75,25);
g.fillOval(515,85,75,25);
g.fillOval(565,75,75,25);
g.fillOval(565,125,75,25);
g.fillOval(605,115,75,25);
g.fillOval(605,85,75,25);
g.fillOval(620,100,75,25);
g.fillOval(560,95,80,35);
g.setColor(Color.gray);
g.fillOval(700,100,75,25);
g.fillOval(715,115,75,25);
g.fillOval(715,85,75,25);
g.fillOval(765,75,75,25);
g.fillOval(765,125,75,25);
g.fillOval(805,115,75,25);
g.fillOval(805,85,75,25);
g.fillOval(820,100,75,25);
g.fillOval(760,95,80,35);
enter code here
g.setColor(Color.cyan);
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,160,100+i,180);
repaint();
}
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,200,100+i,220);
}
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,240,100+i,260);
}
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,280,100+i,300);
}
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,320,100+i,340);
}
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,360,100+i,380);
}
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,400,100+i,420);
}
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,440,100+i,460);
}
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,480,100+i,500);
}
for(int i=0;i<=820;i=i+50)
{
g.drawLine(100+i,520,100+i,540);
}
g.setColor(Color.black);
g.fillRect(0,590,1000,100);
g.setColor(Color.white);
for(i=0;i<=900;i=i+150)
{
g.fillRect(30+i,625,100,25);
}
g.setColor(new Color(139,69,19));
g.fillOval(100,600,35,15);
g.fillOval(300,600,30,10);
g.fillOval(500,600,25,10);
g.fillOval(700,600,35,15);
g.fillOval(125,650,35,15);
g.fillOval(175,650,35,15);
g.fillOval(230,670,35,15);
g.fillOval(280,640,35,15);
g.fillOval(340,630,35,9);
g.fillOval(400,650,35,19);
g.fillOval(450,610,35,10);
g.fillOval(500,610,35,18);
g.fillOval(600,675,35,17);
g.fillOval(700,675,25,15);
g.fillOval(710,675,30,15);
g.fillOval(770,623,40,15);
g.fillOval(690,655,25,15);
g.fillOval(830,660,25,15);
g.fillOval(810,670,23,15);
g.fillOval(880,613,29,15);
}
}
/*<applet code=rain height=1000 width=1000>
</applet>*/
如何使程序中只有for循环部分闪烁？我想闪烁各种for循环中包含的行。或者请告诉任何其他方式闪烁程序的一部分..任何帮助将非常感谢。
1 个答案:
答案 0 :(得分：0)
让我们从Applet开始被弃用，有关详细信息，请参阅Java Plugin support deprecated和Moving to a Plugin-Free Web。
下一个等价物是Swing，就像大多数GUI框架一样，Swing是单线程的而且不是线程安全的，这意味着，你不能在他们的事件线程中执行阻塞或长时间运行的操作，也不应该尝试从外部更新他们的状态他们的事件线程
有关详细信息，请参阅Concurrency in Swing。
在Swing中，您可以选择一些选项，最简单的可能是Swing Timer，有关详细信息，请参阅How to use Swing Timers
现在，严格地说，这将改变循环中绘制的对象的线条颜色，使它们闪烁
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private int count = 0;
private Color lineColor = Color.DARK_GRAY;
private Color[] lineColors = new Color[]{Color.CYAN, Color.DARK_GRAY};
public TestPane() {
Timer timer = new Timer(500, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
count++;
lineColor = lineColors[count % 2];
repaint();
}
});
timer.start();
}
@Override
public Dimension getPreferredSize() {
return new Dimension(1000, 1000);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
setBackground(Color.darkGray);
g2d.setColor(Color.gray);
g2d.fillOval(100, 100, 75, 25);
g2d.fillOval(115, 115, 75, 25);
g2d.fillOval(115, 85, 75, 25);
g2d.fillOval(165, 75, 75, 25);
g2d.fillOval(165, 125, 75, 25);
g2d.fillOval(205, 115, 75, 25);
g2d.fillOval(205, 85, 75, 25);
g2d.fillOval(220, 100, 75, 25);
g2d.fillOval(160, 95, 80, 35);
g2d.setColor(Color.gray);
g2d.fillOval(300, 100, 75, 25);
g2d.fillOval(315, 115, 75, 25);
g2d.fillOval(315, 85, 75, 25);
g2d.fillOval(365, 75, 75, 25);
g2d.fillOval(365, 125, 75, 25);
g2d.fillOval(405, 115, 75, 25);
g2d.fillOval(405, 85, 75, 25);
g2d.fillOval(420, 100, 75, 25);
g2d.fillOval(360, 95, 80, 35);
g2d.setColor(Color.gray);
g2d.fillOval(500, 100, 75, 25);
g2d.fillOval(515, 115, 75, 25);
g2d.fillOval(515, 85, 75, 25);
g2d.fillOval(565, 75, 75, 25);
g2d.fillOval(565, 125, 75, 25);
g2d.fillOval(605, 115, 75, 25);
g2d.fillOval(605, 85, 75, 25);
g2d.fillOval(620, 100, 75, 25);
g2d.fillOval(560, 95, 80, 35);
g2d.setColor(Color.gray);
g2d.fillOval(700, 100, 75, 25);
g2d.fillOval(715, 115, 75, 25);
g2d.fillOval(715, 85, 75, 25);
g2d.fillOval(765, 75, 75, 25);
g2d.fillOval(765, 125, 75, 25);
g2d.fillOval(805, 115, 75, 25);
g2d.fillOval(805, 85, 75, 25);
g2d.fillOval(820, 100, 75, 25);
g2d.fillOval(760, 95, 80, 35);
g2d.setColor(lineColor);
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 160, 100 + i, 180);
}
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 200, 100 + i, 220);
}
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 240, 100 + i, 260);
}
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 280, 100 + i, 300);
}
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 320, 100 + i, 340);
}
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 360, 100 + i, 380);
}
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 400, 100 + i, 420);
}
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 440, 100 + i, 460);
}
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 480, 100 + i, 500);
}
for (int i = 0; i <= 820; i = i + 50) {
g2d.drawLine(100 + i, 520, 100 + i, 540);
}
g2d.setColor(Color.black);
g2d.fillRect(0, 590, 1000, 100);
g2d.setColor(Color.white);
for (int i = 0; i <= 900; i = i + 150) {
g2d.fillRect(30 + i, 625, 100, 25);
}
g2d.setColor(new Color(139, 69, 19));
g2d.fillOval(100, 600, 35, 15);
g2d.fillOval(300, 600, 30, 10);
g2d.fillOval(500, 600, 25, 10);
g2d.fillOval(700, 600, 35, 15);
g2d.fillOval(125, 650, 35, 15);
g2d.fillOval(175, 650, 35, 15);
g2d.fillOval(230, 670, 35, 15);
g2d.fillOval(280, 640, 35, 15);
g2d.fillOval(340, 630, 35, 9);
g2d.fillOval(400, 650, 35, 19);
g2d.fillOval(450, 610, 35, 10);
g2d.fillOval(500, 610, 35, 18);
g2d.fillOval(600, 675, 35, 17);
g2d.fillOval(700, 675, 25, 15);
g2d.fillOval(710, 675, 30, 15);
g2d.fillOval(770, 623, 40, 15);
g2d.fillOval(690, 655, 25, 15);
g2d.fillOval(830, 660, 25, 15);
g2d.fillOval(810, 670, 23, 15);
g2d.fillOval(880, 613, 29, 15);
g2d.dispose();
}
}
}
但是，看起来更好看的是，你可以为雨水制作动画......
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private final int limit = 100;
private List<DropLet> droplets = new ArrayList<>(limit);
public TestPane() {
for (int index = 0; index < limit; index++) {
droplets.add(new DropLet(150, 675));
}
Timer timer = new Timer(5, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
Iterator<DropLet> it = droplets.iterator();
while (it.hasNext()) {
DropLet dropLet = it.next();
if (dropLet.update(675)) {
it.remove();
}
}
while (droplets.size() < limit) {
droplets.add(new DropLet(150, 150));
}
repaint();
}
});
timer.start();
}
@Override
public Dimension getPreferredSize() {
return new Dimension(1000, 1000);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
setBackground(Color.darkGray);
g2d.setColor(Color.gray);
g2d.fillOval(100, 100, 75, 25);
g2d.fillOval(115, 115, 75, 25);
g2d.fillOval(115, 85, 75, 25);
g2d.fillOval(165, 75, 75, 25);
g2d.fillOval(165, 125, 75, 25);
g2d.fillOval(205, 115, 75, 25);
g2d.fillOval(205, 85, 75, 25);
g2d.fillOval(220, 100, 75, 25);
g2d.fillOval(160, 95, 80, 35);
g2d.setColor(Color.gray);
g2d.fillOval(300, 100, 75, 25);
g2d.fillOval(315, 115, 75, 25);
g2d.fillOval(315, 85, 75, 25);
g2d.fillOval(365, 75, 75, 25);
g2d.fillOval(365, 125, 75, 25);
g2d.fillOval(405, 115, 75, 25);
g2d.fillOval(405, 85, 75, 25);
g2d.fillOval(420, 100, 75, 25);
g2d.fillOval(360, 95, 80, 35);
g2d.setColor(Color.gray);
g2d.fillOval(500, 100, 75, 25);
g2d.fillOval(515, 115, 75, 25);
g2d.fillOval(515, 85, 75, 25);
g2d.fillOval(565, 75, 75, 25);
g2d.fillOval(565, 125, 75, 25);
g2d.fillOval(605, 115, 75, 25);
g2d.fillOval(605, 85, 75, 25);
g2d.fillOval(620, 100, 75, 25);
g2d.fillOval(560, 95, 80, 35);
g2d.setColor(Color.gray);
g2d.fillOval(700, 100, 75, 25);
g2d.fillOval(715, 115, 75, 25);
g2d.fillOval(715, 85, 75, 25);
g2d.fillOval(765, 75, 75, 25);
g2d.fillOval(765, 125, 75, 25);
g2d.fillOval(805, 115, 75, 25);
g2d.fillOval(805, 85, 75, 25);
g2d.fillOval(820, 100, 75, 25);
g2d.fillOval(760, 95, 80, 35);
g2d.setColor(Color.black);
g2d.fillRect(0, 590, 1000, 100);
g2d.setColor(Color.white);
for (int i = 0; i <= 900; i = i + 150) {
g2d.fillRect(30 + i, 625, 100, 25);
}
g2d.setColor(new Color(139, 69, 19));
g2d.fillOval(100, 600, 35, 15);
g2d.fillOval(300, 600, 30, 10);
g2d.fillOval(500, 600, 25, 10);
g2d.fillOval(700, 600, 35, 15);
g2d.fillOval(125, 650, 35, 15);
g2d.fillOval(175, 650, 35, 15);
g2d.fillOval(230, 670, 35, 15);
g2d.fillOval(280, 640, 35, 15);
g2d.fillOval(340, 630, 35, 9);
g2d.fillOval(400, 650, 35, 19);
g2d.fillOval(450, 610, 35, 10);
g2d.fillOval(500, 610, 35, 18);
g2d.fillOval(600, 675, 35, 17);
g2d.fillOval(700, 675, 25, 15);
g2d.fillOval(710, 675, 30, 15);
g2d.fillOval(770, 623, 40, 15);
g2d.fillOval(690, 655, 25, 15);
g2d.fillOval(830, 660, 25, 15);
g2d.fillOval(810, 670, 23, 15);
g2d.fillOval(880, 613, 29, 15);
for (DropLet dropLet : droplets) {
dropLet.paint(g2d);
}
g2d.dispose();
}
public class DropLet {
private Point location;
private int yDelta;
public DropLet(int from, int to) {
location = new Point(100 + (int)(Math.random() * 800), from + (int)(Math.random() * (to - from)));
yDelta = (int)(Math.random() * 5) + 1;
}
public boolean update(int range) {
location.y += yDelta;
return location.y > range;
}
public void paint(Graphics2D g2d) {
g2d.setColor(Color.CYAN);
g2d.fillOval(location.x - 3, location.y - 3, 6, 6);
}
}
}
}
虽然这可能看起来有些复杂，但这个概念非常基础。您有List DroplLet个DropLet，代表update的位置及其下降的速度。您基本上会遍历列表并DropLet .trx的位置，直到它们超出您想要的范围，此时它们将被删除。
“主循环”保持恒定数量的液滴，在这种情况下为100，以便它继续下雨。
为了简单起见，液滴的位置和速度是随机的
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