Java 如何使重绘变慢?
我正在制作一个Java应用程序,我想知道是否有办法让jframe上的重绘速度变慢。让我详细说明一下,该应用程序有一个jframe,并调用另一个jframe来显示一个图形,该图形必须从一侧移动到另一侧,但它的速度可以让您实际看到移动 编辑* 为了让自己清楚,我添加了一段代码Java 如何使重绘变慢?,java,swing,jframe,repaint,Java,Swing,Jframe,Repaint,我正在制作一个Java应用程序,我想知道是否有办法让jframe上的重绘速度变慢。让我详细说明一下,该应用程序有一个jframe,并调用另一个jframe来显示一个图形,该图形必须从一侧移动到另一侧,但它的速度可以让您实际看到移动 编辑* 为了让自己清楚,我添加了一段代码 import javax.swing.JFrame; import javax.swing.JLabel; public class NewJFrame extends javax.swing.JFrame {
import javax.swing.JFrame;
import javax.swing.JLabel;
public class NewJFrame extends javax.swing.JFrame {
/**
* Creates new form NewJFrame
*/
public NewJFrame() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("Start");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jScrollPane1.setViewportView(jTextArea1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1)
.addContainerGap())
.addGroup(layout.createSequentialGroup()
.addGap(152, 152, 152)
.addComponent(jButton1)
.addContainerGap(191, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(47, 47, 47)
.addComponent(jButton1)
.addGap(18, 18, 18)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 149, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(63, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String position="";
JFrame frame1=new JFrame();
JLabel label1=new JLabel();
label1.setText("Hello!");
frame1.add(label1);
frame1.setSize(400,300);
frame1.setVisible(true);
for(int i=1;i<20;i++){
label1.setLocation(i, i);
frame1.repaint();
position+="The label is at position: "+label1.getLocation()+"\n";
jTextArea1.setText(position);
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
NewJFrame frame= new NewJFrame();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextArea jTextArea1;
// End of variables declaration
}
import javax.swing.JFrame;
导入javax.swing.JLabel;
公共类NewJFrame扩展了javax.swing.JFrame{
/**
*创建新表单NewJFrame
*/
公共NewJFrame(){
初始化组件();
}
/**
*从构造函数中调用此方法来初始化表单。
*警告:不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告(“未选中”)
//
私有组件(){
jButton1=newjavax.swing.JButton();
jScrollPane1=newjavax.swing.JScrollPane();
jTextArea1=newjavax.swing.JTextArea();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText(“开始”);
jButton1.addActionListener(新java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
jButton1ActionPerformed(evt);
}
});
jTextArea1.设置列(20);
jTextArea1.设置行(5);
jScrollPane1.setViewportView(jTextArea1);
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1)
.addContainerGap())
.addGroup(layout.createSequentialGroup()
.addGap(152152152)
.addComponent(jButton1)
.addContainerGap(191,简称最大值))
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(47,47,47)
.addComponent(jButton1)
.addGap(18,18,18)
.addComponent(jScrollPane1,javax.swing.GroupLayout.PREFERRED\u SIZE,149,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addContainerGap(63,简称最大值))
);
包装();
}//
私有void jButton1ActionPerformed(java.awt.event.ActionEvent evt){
字符串位置=”;
JFrame frame1=新JFrame();
JLabel label1=新的JLabel();
标签1.setText(“你好!”);
框架1.添加(标签1);
框架1.设置尺寸(400300);
frame1.setVisible(true);
对于(int i=1;i
应严格禁止EDT上的睡眠
如果你想使用睡眠
,你应该直接考虑摆动计时器
现在,如果你想看一个如何轻松改变移动元件速度的例子,你不需要改变摆动计时器的频率,但实际上要改变移动元件的速度。50Hz的频率通常对人来说就足够了
下面是一个小的演示代码:
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.MalformedURLException;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class TestAnimation2 {
private static final int NB_OF_IMAGES_PER_SECOND = 50;
private static final int WIDTH = 800;
private static final int HEIGHT = 600;
private static final int MIN = 0;
private static final int MAX = 100;
private double speed = convert(50);
private double dx;
private double dy;
private double x = WIDTH / 2;
private double y = HEIGHT / 2;
private JFrame frame;
private CirclePanel circle;
private Runnable job;
private long lastMove = System.currentTimeMillis();
protected void initUI() throws MalformedURLException {
frame = new JFrame(TestAnimation2.class.getSimpleName());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(null);
circle = new CirclePanel();
circle.setSize(20, 20);
frame.add(circle);
frame.setSize(WIDTH, HEIGHT);
dx = speed;
dy = speed;
final JSlider slider = new JSlider(MIN, MAX);
slider.addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
speed = convert(slider.getValue());
if (dx > 0) {
dx = speed;
} else {
dx = -speed;
}
if (dy > 0) {
dy = speed;
} else {
dy = -speed;
}
}
});
slider.setValue(50);
slider.setLocation(0, 0);
slider.setSize(slider.getPreferredSize());
frame.add(slider);
frame.setVisible(true);
Timer t = new Timer(1000 / NB_OF_IMAGES_PER_SECOND, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
move();
}
});
t.start();
}
protected double convert(double sliderValue) {
return sliderValue + 1;
}
protected void move() {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
x += dx;
y += dy;
if (x + circle.getWidth() > frame.getContentPane().getWidth()) {
x = frame.getContentPane().getWidth() - circle.getWidth();
dx = -speed;
} else if (x < 0) {
x = 0;
dx = speed;
}
if (y + circle.getHeight() > frame.getContentPane().getHeight()) {
y = frame.getContentPane().getHeight() - circle.getHeight();
dy = -speed;
} else if (y < 0) {
y = 0;
dy = speed;
}
circle.setLocation((int) x, (int) y);
circle.repaint();
}
});
}
public static class CirclePanel extends JPanel {
public CirclePanel() {
super();
setOpaque(false);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.RED);
g.fillOval(0, 0, getWidth(), getHeight());
}
}
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException,
UnsupportedLookAndFeelException {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
try {
new TestAnimation2().initUI();
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
});
}
}
导入java.awt.Color;
导入java.awt.Graphics;
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java.net.MalformedURLException;
导入javax.swing.JFrame;
导入javax.swing.JPanel;
导入javax.swing.JSlider;
导入javax.swing.SwingUtilities;
导入javax.swing.Timer;
导入javax.swing.UnsupportedLookAndFeelException;
导入javax.swing.event.ChangeEvent;
导入javax.swing.event.ChangeListener;
公共类测试2{
每秒图像的私有静态最终int NB_=50;
专用静态最终整数宽度=800;
专用静态最终内部高度=600;
私有静态最终int MIN=0;
专用静态最终整数最大值=100;
专用双速=转换(50);
私人双dx;
私人双重身份;
专用双x=宽度/2;
私人双y=高度/2;
私有JFrame;
专用电路板电路;
私人经营性工作;
private long lastMove=System.currentTimeMillis();
受保护的void initUI()引发错误的FormedUrlexception{
frame=newjframe(TestAnimation2.class.getSimpleName());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(空);
圆圈=新的圆圈面板();
圆形。设置尺寸(20,20);
框架。添加(圆圈);
框架尺寸(宽度、高度);
dx=速度;
dy=速度;
最终JSlider滑块=新JSlider(最小、最大);
slider.addChangeListener(新的ChangeListener(){
@凌驾
公共无效状态已更改(更改事件e){
速度=转换(slider.getValue());
如果(dx>0){
dx=速度;
}否则{
dx=速度;
}
如果(dy>0){
dy=速度;
}否则{
dy=速度;
}
}
});
滑块设置值(50);
滑块。设置位置(0,0);
slider.setSize(slider.getPreferredSize());
frame.add(滑块);
frame.setVisible(true);
定时器t=新定时器(每秒1000个/NB\u个图像,新ActionListener(){
@凌驾
已执行的公共无效操作(操作事件e){
move();
}
});
t、 start();
}
受保护的双转换(双滑动值){
返回sliderValue+1;
}
受保护的无效移动(){
SwingUtilities.invokeLater(新的Runnable(){
@凌驾
公开募捐{
x+=dx;