我想做一个排序动画。我有一个带有 GridLayout(1,3)的 JFrame ,因为我有3个排序算法。在每个单元格中,我有 JPanel , BorderLayout()。在 JPanel 的中心中,我有数字,每个数字都有不同宽度的标尺(我将它们水平放置)。对于每种类型的排序,我需要一个线程来调用它们。所以我创建了类 SortThread ,它进行了我的排序(它扩展了 JThread )。每对数字和小节都在中间面板上绘制,类 StickNumber ,扩展 JLabel 。问题是当我启动线程时。 repaint()方法似乎无法正常工作。
此类为 SortThread :
public class SortThread extends Thread{
private JPanel sortPanel;
private StickNumber[] listOfNumbers;
public SortThread(JPanel sortPanel)
{
this.sortPanel = sortPanel;
Component[] components = sortPanel.getComponents();
listOfNumbers = new StickNumber[components.length];
for(int i = 0; i<components.length; i++)
listOfNumbers[i] = (StickNumber) components[i];
}
public SortThread(){}
public void bubbleSort()
{
boolean swapped = true;
int j = 0;
StickNumber tmp;
while (swapped) {
swapped = false;
j++;
for (int i = 0; i < listOfNumbers.length - j; i++) {
if (listOfNumbers[i].getValue() > listOfNumbers[i+1].getValue()) {
tmp = listOfNumbers[i];
listOfNumbers[i]=listOfNumbers[i+1];
listOfNumbers[i+1]=tmp;
swapped = true;
sortPanel.validate();
sortPanel.repaint();
}
}
}
}
public void run(){
bubbleSort();
}
这是我的按钮的监听器,它启动了线程:
ActionListener sortListener = new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(sortFlag == false)
{
sortFlag = true;
SortThread thread1= new SortThread(centerPanel1);
thread1.start();
appFrame.validate();
appFrame.repaint();
}
}
};
sortButton.addActionListener(sortListener);
StickNumber 类:
private void doDrawing(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
String number = Integer.toString(value);
if(dimension!=0)
setText(number);
g2.setStroke(new BasicStroke(5));
g2.draw(new Line2D.Float(dimension*10, 5, height+dimension*10, 5));
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
doDrawing(g);
}
答案 0 :(得分:0)
使用SwingWorker,假设您的代码完成了应有的操作,而您的问题是EDT被阻止了:
import java.awt.Component;
import java.util.List;
import javax.swing.*;
public class SortSwingWorker extends SwingWorker<Object, Object> {
private JPanel sortPanel;
private StickNumber[] listOfNumbers;
public SortSwingWorker(JPanel sortPanel) {
this.sortPanel = sortPanel;
Component[] components = sortPanel.getComponents();
listOfNumbers = new StickNumber[components.length];
for (int i = 0; i < components.length; i++) {
listOfNumbers[i] = (StickNumber) components[i];
}
}
@Override
protected Object doInBackground() throws Exception {
boolean swapped = true;
int j = 0;
StickNumber tmp;
while (swapped) {
swapped = false;
j++;
for (int i = 0; i < listOfNumbers.length - j; i++) {
if (listOfNumbers[i].getValue() > listOfNumbers[i + 1].getValue()) {
tmp = listOfNumbers[i];
listOfNumbers[i] = listOfNumbers[i + 1];
listOfNumbers[i + 1] = tmp;
swapped = true;
publish(null);
}
}
}
return null;
}
@Override
protected void process(List<Object> list) {
sortPanel.validate();
sortPanel.repaint();
}
//dummy class
private class StickNumber extends Component {
public Integer getValue() {
return null;
}
}
}