Java 从SwingWorker实时更新GUI
好的,这是我昨天问题的后续问题 考虑到Java 从SwingWorker实时更新GUI,java,swing,swingworker,event-dispatch-thread,invokelater,Java,Swing,Swingworker,Event Dispatch Thread,Invokelater,好的,这是我昨天问题的后续问题 考虑到SwingWorker
SwingWorker
的内部调用SwingUtilities#invokeAndWait()
可能还可以,我想进一步问:在后台线程内部调用SwingUtilities#invokeAndWait()
也可以吗?
另一个SSCCE用于说明:
public class NewClass extends javax.swing.JFrame {
public NewClass() {
jScrollPane1 = new javax.swing.JScrollPane();
atable = new javax.swing.JTable();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
atable.setModel(new javax.swing.table.DefaultTableModel(
new Object[][]{
{null, null},
{null, null},
{null, null},
{null, null}
},
new String[]{
"Title 1", "Title 2"
}
));
jScrollPane1.setViewportView(atable);
jButton1.setText("Go");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
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()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jButton1)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 228, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1)
.addContainerGap())
);
pack();
setLocationByPlatform(true);
setVisible(true);
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
new Task();
}
class Task extends javax.swing.SwingWorker<Void, Object[]> {
DeterminateLoadingFrame dlf;
public Task() {
dlf = new DeterminateLoadingFrame();
atable.setModel(new javax.swing.table.DefaultTableModel(
new Object[][]{},
new String[]{
"Title 1", "Title 2"
}
));
dlf.setMaximum(1000);
execute();
}
@Override
protected void process(java.util.List<Object[]> chunks) {
for (Object[] row : chunks) {
((javax.swing.table.DefaultTableModel) atable.getModel()).addRow(row);
}
}
@Override
protected Void doInBackground() throws Exception {
for (int i = 0; i < 1000; i++) {
final int j = i;
Object[] row = new Object[2];
row[0] = "row " + i;
row[1] = Math.round(Math.random() * 100);
publish(row);
javax.swing.SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
dlf.changeText("Processing " + j + " of " + 1000);
dlf.setValue(j);
}
});
Thread.sleep(100);
}
return null;
}
@Override
protected void done() {
if (!isCancelled()) {
try {
get();
} catch (java.util.concurrent.ExecutionException | InterruptedException e) {
e.printStackTrace();
}
}
dlf.dispose();
}
}
class DeterminateLoadingFrame extends javax.swing.JFrame {
javax.swing.JLabel jLabel1;
javax.swing.JProgressBar jProgressBar1;
public DeterminateLoadingFrame() {
jProgressBar1 = new javax.swing.JProgressBar();
jLabel1 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
setTitle("Loading");
jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel1.setText("Loading ...");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 182, Short.MAX_VALUE)
.addComponent(jProgressBar1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 182, Short.MAX_VALUE))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
setAlwaysOnTop(true);
setLocationRelativeTo(null);
setVisible(true);
setAlwaysOnTop(false);
}
public void changeText(String message) {
this.jLabel1.setText(message);
System.out.println(message);
}
public void setMaximum(int max) {
jProgressBar1.setMaximum(max);
}
public void setValue(int n) {
jProgressBar1.setValue(n);
}
}
public static void main(String args[]) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new NewClass();
}
});
}
private javax.swing.JTable atable;
private javax.swing.JButton jButton1;
private javax.swing.JScrollPane jScrollPane1;
}
公共类NewClass扩展了javax.swing.JFrame{
公共类(){
jScrollPane1=newjavax.swing.JScrollPane();
atable=newjavax.swing.JTable();
jButton1=newjavax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setModel(新的javax.swing.table.DefaultTableModel(
新对象[][]{
{null,null},
{null,null},
{null,null},
{null,null}
},
新字符串[]{
“标题1”、“标题2”
}
));
jScrollPane1.setViewportView(atable);
jButton1.setText(“Go”);
jButton1.addActionListener(新java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1,javax.swing.GroupLayout.DEFAULT\u SIZE,380,Short.MAX\u值)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addGap(0,0,短.MAX_值)
.addComponent(jButton1)))
.addContainerGap())
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1,javax.swing.GroupLayout.DEFAULT\u SIZE,228,Short.MAX\u值)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1)
.addContainerGap())
);
包装();
setLocationByPlatform(真);
setVisible(真);
}
私有void jButton1ActionPerformed(java.awt.event.ActionEvent evt){
新任务();
}
类任务扩展了javax.swing.SwingWorker{
确定帧dlf;
公共任务(){
dlf=新的确定框架();
setModel(新的javax.swing.table.DefaultTableModel(
新对象[][]{},
新字符串[]{
“标题1”、“标题2”
}
));
dlf.设定最大值(1000);
执行();
}
@凌驾
受保护的void进程(java.util.List块){
对于(对象[]行:块){
((javax.swing.table.DefaultTableModel)atable.getModel()).addRow(row);
}
}
@凌驾
受保护的Void doInBackground()引发异常{
对于(int i=0;i<1000;i++){
最终int j=i;
Object[]行=新对象[2];
行[0]=“行”+i;
行[1]=Math.round(Math.random()*100);
出版(世界其他地区);
javax.swing.SwingUtilities.invokeLater(新的Runnable(){
@凌驾
公开募捐{
dlf.changeText(“处理”+j+”或“+1000”);
dlf.设定值(j);
}
});
睡眠(100);
}
返回null;
}
@凌驾
受保护的void done(){
如果(!isCancelled()){
试一试{
get();
}catch(java.util.concurrent.ExecutionException | InterruptedException e){
e、 printStackTrace();
}
}
dlf.dispose();
}
}
类definiteLoadingFrame扩展了javax.swing.JFrame{
javax.swing.JLabel jLabel1;
javax.swing.jprogressbarjprogressbar1;
公共决策框架(){
jProgressBar1=newjavax.swing.JProgressBar();
jLabel1=newjavax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE\u ON\u CLOSE);
设置标题(“加载”);
jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel1.setText(“加载…”);
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.training)
.addComponent(jLabel1,javax.swing.GroupLayout.Alignment.LEADING,javax.swing.GroupLayout.DEFAULT\u SIZE,182,Short.MAX\u值)
.addComponent(jProgressBar1,javax.swing.GroupLayout.Alignment.LEADING,javax.swing.GroupLayout.DEFAULT\u SIZE,182,Short.MAX\u值))
.addContainerGap())
);
private static class Update {
private int counter;
private Object[] row;
// constructor, getters omitted for brevity
}
...
class Task extends SwingWorker<Void, Update> {
@Override
protected Void doInBackground() throws Exception {
for (int i = 0; i < 1000; i++) {
Object[] row = new Object[2];
row[0] = "row " + i;
row[1] = Math.round(Math.random() * 100);
publish(new Update(i, row);
Thread.sleep(100);
}
return null;
}
@Override
protected void process(java.util.List<Update> chunks) {
for (Update update : chunks) {
((DefaultTableModel) atable.getModel()).addRow(update.getRow());
}
int lastCounter = chunks.get(chunks.size() - 1).getCounter();
dlf.changeText("Processing " + lastCounter + " of " + 1000);
dlf.setValue(lastCounter);
}
...
}
class Task extends javax.swing.SwingWorker<Void, Object[]> {
public static final String ROW_COUNT = "row count";
DeterminateLoadingFrame dlf;
private int rowCount = 0;
public Task() {
dlf = new DeterminateLoadingFrame(); // and I would pass this in from the GUI
atable.setModel(new javax.swing.table.DefaultTableModel(
new Object[][] {}, new String[] { "Title 1", "Title 2" }));
dlf.setMaximum(1000);
// execute(); // I reserve this for the calling code.
}
public int getRowCount() {
return rowCount;
}
public void setRowCount(int newValue) {
int oldValue = this.rowCount;
this.rowCount = newValue;
firePropertyChange(ROW_COUNT, oldValue, newValue);
}
@Override
protected void process(java.util.List<Object[]> chunks) {
for (Object[] row : chunks) {
((javax.swing.table.DefaultTableModel) atable.getModel())
.addRow(row);
}
}
@Override
protected Void doInBackground() throws Exception {
for (int i = 0; i < 1000; i++) {
final int j = i;
Object[] row = new Object[2];
row[0] = "row " + i;
row[1] = Math.round(Math.random() * 100);
publish(row);
setRowCount(j);
Thread.sleep(100);
}
return null;
}
// .....
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
final Task task = new Task();
task.addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent evt) {
if (Task.ROW_COUNT.equals(evt.getPropertyName())) {
int rowCount = task.getRowCount();
// do what you need with rowCount here
}
}
});
task.execute(); // again I usually call this here
}