SwingUtilitiesのinvokeLater、invokeAndWaitはいつつかうべき？
2006/06/26
2006/11/26
Swingを使ったプログラミングででてくる
SwingUtilities.invokeLater(...)
をどのようなときに使えばよいのだろうか。
実はよくわかっていない。
こういったコードをみかける。
SwingUtilities.invokeAndWait(new Runnable() {
public void run() {
button.setEnabled(false);
}
});
Javadocには下記のように説明されています。
invokeLaterを試してみるサンプルをつくる試み。
未完です。
import javax.swing.SwingUtilities;
import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import java.awt.GridBagConstraints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TestFrame extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JMenuBar jJMenuBar = null;
private JMenu jMenu = null;
private JMenuItem jMenuItem = null;
private JMenu jMenu1 = null;
private JPanel jPanel = null;
private JButton jButton = null;
private JButton jButton1 = null;
private JButton jButton2 = null;
private JMenuItem jMenuItem1 = null;
private JMenuItem jMenuItem2 = null;
private TestFrame.ExecuteActionCommand executeActionCommand = null; // @jve:decl-index=0:visual-constraint="463,138"
private JMenuBar getJJMenuBar() {
if (jJMenuBar == null) {
jJMenuBar = new JMenuBar();
jJMenuBar.add(getJMenu());
}
return jJMenuBar;
}
private JMenu getJMenu() {
if (jMenu == null) {
jMenu = new JMenu();
jMenu.setText("menu");
jMenu.add(getJMenu1());
}
return jMenu;
}
private JMenuItem getJMenuItem() {
if (jMenuItem == null) {
jMenuItem = new JMenuItem();
jMenuItem.setText("take long time..");
jMenuItem.setActionCommand("act1");
jMenuItem.addActionListener(getExecuteActionCommand());
}
return jMenuItem;
}
/**
* This method initializes jMenu1
*
* @return javax.swing.JMenu
*/
private JMenu getJMenu1() {
if (jMenu1 == null) {
jMenu1 = new JMenu();
jMenu1.setText("menu");
jMenu1.add(getJMenuItem());
jMenu1.add(getJMenuItem1());
jMenu1.add(getJMenuItem2());
}
return jMenu1;
}
private JPanel getJPanel() {
if (jPanel == null) {
GridBagConstraints gridBagConstraints2 = new GridBagConstraints();
gridBagConstraints2.gridx = 0;
gridBagConstraints2.gridy = 2;
GridBagConstraints gridBagConstraints1 = new GridBagConstraints();
gridBagConstraints1.gridx = 0;
gridBagConstraints1.gridy = 1;
GridBagConstraints gridBagConstraints = new GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 0;
jPanel = new JPanel();
jPanel.setLayout(new GridBagLayout());
jPanel.add(getJButton(), gridBagConstraints);
jPanel.add(getJButton1(), gridBagConstraints1);
jPanel.add(getJButton2(), gridBagConstraints2);
}
return jPanel;
}
private JButton getJButton() {
if (jButton == null) {
jButton = new JButton();
jButton.setActionCommand("act1");
jButton.setText("take long time..");
jButton.addActionListener(getExecuteActionCommand());
}
return jButton;
}
private JButton getJButton1() {
if (jButton1 == null) {
jButton1 = new JButton();
jButton1.setText("act2");
jButton1.setActionCommand("act2");
jButton1.addActionListener(getExecuteActionCommand());
}
return jButton1;
}
private JButton getJButton2() {
if (jButton2 == null) {
jButton2 = new JButton();
jButton2.setText("act3");
jButton2.setActionCommand("act3");
jButton2.addActionListener(getExecuteActionCommand());
}
return jButton2;
}
private JMenuItem getJMenuItem1() {
if (jMenuItem1 == null) {
jMenuItem1 = new JMenuItem();
jMenuItem1.setText("act2");
jMenuItem1.setActionCommand("act2");
jMenuItem1.addActionListener(getExecuteActionCommand());
}
return jMenuItem1;
}
private JMenuItem getJMenuItem2() {
if (jMenuItem2 == null) {
jMenuItem2 = new JMenuItem();
jMenuItem2.setText("act2");
jMenuItem2.setActionCommand("act2");
jMenuItem2.addActionListener(getExecuteActionCommand());
}
return jMenuItem2;
}
private TestFrame.ExecuteActionCommand getExecuteActionCommand() {
if (executeActionCommand == null) {
executeActionCommand = new TestFrame.ExecuteActionCommand();
}
return executeActionCommand;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
TestFrame thisClass = new TestFrame();
thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
thisClass.setVisible(true);
}
});
}
public TestFrame() {
super();
initialize();
}
private void initialize() {
this.setSize(300, 200);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setJMenuBar(getJJMenuBar());
this.setContentPane(getJContentPane());
this.setTitle("JFrame");
}
private JPanel getJContentPane() {
if (jContentPane == null) {
jContentPane = new JPanel();
jContentPane.setLayout(new BorderLayout());
jContentPane.add(getJPanel(), BorderLayout.CENTER);
}
return jContentPane;
}
class ExecuteActionCommand implements ActionListener {
public void actionPerformed(ActionEvent e) {
String actionCommand = e.getActionCommand();
action(actionCommand);
}
public void action(String actionCommand) {
if (eq(actionCommand, "act1")) {
try {
System.out.println("take long time action...");
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
System.out.println("wake up!!");
}
return;
}
if (eq(actionCommand, "act2")) {
System.out.println(Thread.currentThread());
SwingUtilities.invokeLater(new Runnable() {
public void run() {
jButton.setEnabled(false);
System.out.println("@_@!!" + Thread.currentThread());
}
});
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
jButton2.setEnabled(false);
System.out.println("take long time action...");
System.out.println(Thread.currentThread());
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
System.out.println("wake up!!");
}
}
});
System.out.println("==== THIS LINE");
return;
}
if (eq(actionCommand, "act3")) {
System.out.println("act3...");
Runnable runnable = new Runnable() {
public void run() {
try {
System.out.println("Hoooo "
+ Thread.currentThread().getName());
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
System.out.println("wake up["
+ Thread.currentThread().getName() + "]");
}
}
};
Thread thread = new Thread(runnable);
thread.start();
return;
}
}
}
protected static boolean eq(Object object, Object object2) {
return object == null ? object2 == null : object.equals(object2);
}
}
SwingUtilities.invokeLater(...)
をどのようなときに使えばよいのだろうか。
実はよくわかっていない。
こういったコードをみかける。
SwingUtilities.invokeAndWait(new Runnable() {
public void run() {
button.setEnabled(false);
}
});
Javadocには下記のように説明されています。
保留中のすべての AWT イベントが処理されたあとに発生します。
Javadoc 日本語版
invokeLaterを試してみるサンプルをつくる試み。
未完です。
import javax.swing.SwingUtilities;
import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import java.awt.GridBagConstraints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TestFrame extends JFrame {
private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JMenuBar jJMenuBar = null;
private JMenu jMenu = null;
private JMenuItem jMenuItem = null;
private JMenu jMenu1 = null;
private JPanel jPanel = null;
private JButton jButton = null;
private JButton jButton1 = null;
private JButton jButton2 = null;
private JMenuItem jMenuItem1 = null;
private JMenuItem jMenuItem2 = null;
private TestFrame.ExecuteActionCommand executeActionCommand = null; // @jve:decl-index=0:visual-constraint="463,138"
private JMenuBar getJJMenuBar() {
if (jJMenuBar == null) {
jJMenuBar = new JMenuBar();
jJMenuBar.add(getJMenu());
}
return jJMenuBar;
}
private JMenu getJMenu() {
if (jMenu == null) {
jMenu = new JMenu();
jMenu.setText("menu");
jMenu.add(getJMenu1());
}
return jMenu;
}
private JMenuItem getJMenuItem() {
if (jMenuItem == null) {
jMenuItem = new JMenuItem();
jMenuItem.setText("take long time..");
jMenuItem.setActionCommand("act1");
jMenuItem.addActionListener(getExecuteActionCommand());
}
return jMenuItem;
}
/**
* This method initializes jMenu1
*
* @return javax.swing.JMenu
*/
private JMenu getJMenu1() {
if (jMenu1 == null) {
jMenu1 = new JMenu();
jMenu1.setText("menu");
jMenu1.add(getJMenuItem());
jMenu1.add(getJMenuItem1());
jMenu1.add(getJMenuItem2());
}
return jMenu1;
}
private JPanel getJPanel() {
if (jPanel == null) {
GridBagConstraints gridBagConstraints2 = new GridBagConstraints();
gridBagConstraints2.gridx = 0;
gridBagConstraints2.gridy = 2;
GridBagConstraints gridBagConstraints1 = new GridBagConstraints();
gridBagConstraints1.gridx = 0;
gridBagConstraints1.gridy = 1;
GridBagConstraints gridBagConstraints = new GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 0;
jPanel = new JPanel();
jPanel.setLayout(new GridBagLayout());
jPanel.add(getJButton(), gridBagConstraints);
jPanel.add(getJButton1(), gridBagConstraints1);
jPanel.add(getJButton2(), gridBagConstraints2);
}
return jPanel;
}
private JButton getJButton() {
if (jButton == null) {
jButton = new JButton();
jButton.setActionCommand("act1");
jButton.setText("take long time..");
jButton.addActionListener(getExecuteActionCommand());
}
return jButton;
}
private JButton getJButton1() {
if (jButton1 == null) {
jButton1 = new JButton();
jButton1.setText("act2");
jButton1.setActionCommand("act2");
jButton1.addActionListener(getExecuteActionCommand());
}
return jButton1;
}
private JButton getJButton2() {
if (jButton2 == null) {
jButton2 = new JButton();
jButton2.setText("act3");
jButton2.setActionCommand("act3");
jButton2.addActionListener(getExecuteActionCommand());
}
return jButton2;
}
private JMenuItem getJMenuItem1() {
if (jMenuItem1 == null) {
jMenuItem1 = new JMenuItem();
jMenuItem1.setText("act2");
jMenuItem1.setActionCommand("act2");
jMenuItem1.addActionListener(getExecuteActionCommand());
}
return jMenuItem1;
}
private JMenuItem getJMenuItem2() {
if (jMenuItem2 == null) {
jMenuItem2 = new JMenuItem();
jMenuItem2.setText("act2");
jMenuItem2.setActionCommand("act2");
jMenuItem2.addActionListener(getExecuteActionCommand());
}
return jMenuItem2;
}
private TestFrame.ExecuteActionCommand getExecuteActionCommand() {
if (executeActionCommand == null) {
executeActionCommand = new TestFrame.ExecuteActionCommand();
}
return executeActionCommand;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
TestFrame thisClass = new TestFrame();
thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
thisClass.setVisible(true);
}
});
}
public TestFrame() {
super();
initialize();
}
private void initialize() {
this.setSize(300, 200);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setJMenuBar(getJJMenuBar());
this.setContentPane(getJContentPane());
this.setTitle("JFrame");
}
private JPanel getJContentPane() {
if (jContentPane == null) {
jContentPane = new JPanel();
jContentPane.setLayout(new BorderLayout());
jContentPane.add(getJPanel(), BorderLayout.CENTER);
}
return jContentPane;
}
class ExecuteActionCommand implements ActionListener {
public void actionPerformed(ActionEvent e) {
String actionCommand = e.getActionCommand();
action(actionCommand);
}
public void action(String actionCommand) {
if (eq(actionCommand, "act1")) {
try {
System.out.println("take long time action...");
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
System.out.println("wake up!!");
}
return;
}
if (eq(actionCommand, "act2")) {
System.out.println(Thread.currentThread());
SwingUtilities.invokeLater(new Runnable() {
public void run() {
jButton.setEnabled(false);
System.out.println("@_@!!" + Thread.currentThread());
}
});
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
jButton2.setEnabled(false);
System.out.println("take long time action...");
System.out.println(Thread.currentThread());
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
System.out.println("wake up!!");
}
}
});
System.out.println("==== THIS LINE");
return;
}
if (eq(actionCommand, "act3")) {
System.out.println("act3...");
Runnable runnable = new Runnable() {
public void run() {
try {
System.out.println("Hoooo "
+ Thread.currentThread().getName());
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
System.out.println("wake up["
+ Thread.currentThread().getName() + "]");
}
}
};
Thread thread = new Thread(runnable);
thread.start();
return;
}
}
}
protected static boolean eq(Object object, Object object2) {
return object == null ? object2 == null : object.equals(object2);
}
}
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