[英]SwingUtilities.invokeLater : Issues
我從來不理解SwingUtilities.invokeLater
,這就是我一直避免使用它的原因。但是讓Swing Thread安全是非常重要的。 好吧請原諒,因為這是我第一次這樣做。 我試圖在一些數據庫查詢后關閉窗口。所以,據我所知, UI
任何更新都必須由SwingUtilities.invokeLater
處理。這是我的工作:
主要:
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new forminsert().setVisible(true);
forminsert f=new forminsert();
}
});
}
public forminsert() {
initComponents();
}
public class forminsert extends javax.swing.JFrame {
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setUndecorated(true);
jPanel1.setBackground(new java.awt.Color(0, 0, 0));
jPanel1.setBorder(javax.swing.BorderFactory.createMatteBorder(3, 3, 3, 3, new java.awt.Color(0, 204, 204)));
/////***REST CODE***/////
}
listd on ADD按鈕
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
new Thread(new thread1()).start();
}
public class thread1 implements Runnable
{
public void run() {
insert ins=new insert();
////code for inserting///
}
}
列表器上的瀏覽按鈕
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
JFileChooser ss=new JFileChooser();
////Code to choose the file////
}
這是問題,代碼退出。
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
forminsert f=new forminsert();f.call();
}
public void call()
{
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
jPanel1.setVisible(false);
getRootPane().setVisible(false);
}
});
屏幕:
請解釋我哪里出錯了,我不想使用System.exit
,請原諒我提出太多問題。 System.exit
。
更新:
以下是@trashgod請求的示例工作代碼
package faltur;
import java.io.File;
import javax.swing.JFileChooser;
public class insert extends javax.swing.JFrame {
/** Creates new form insert */
public insert() {
initComponents();
}
@SuppressWarnings("unchecked")
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setUndecorated(true);
jPanel1.setForeground(new java.awt.Color(240, 240, 240));
jButton1.setText("Browse..");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("exit");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jButton1)
.addGap(31, 31, 31)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 185, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(153, 153, 153)
.addComponent(jButton2)))
.addContainerGap(99, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(66, 66, 66)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 30, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(87, 87, 87)
.addComponent(jButton2)
.addContainerGap(94, Short.MAX_VALUE))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
pack();
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
JFileChooser ss=new JFileChooser();
ss.showOpenDialog(jTextField1);
File f=ss.getSelectedFile();
path=f.toString();
System.out.println(path);
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
insert in=new insert();
in.exit();/////////////CALLS exit()/////////////////modify this//////
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new insert().setVisible(true);
}
});
}
public void exit()////////////////////////MODIFY THIS///////////////////
{
jPanel1.getRootPane().setVisible(false);
}
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JPanel jPanel1;
private javax.swing.JTextField jTextField1;
public String path="";
}
請運行並告訴如何修改exit()
以便關閉窗口。再次感謝。
因為你的窗體的默認close操作EXIT_ON_CLOSE
,您可以發送WindowEvent.WINDOW_CLOSING
通過dispatchEvent()
如圖所示這里 。 鑒於JFrame f
,
private static final String EXIT = "Exit";
private Action exit = new AbstractAction(EXIT) {
@Override
public void actionPerformed(ActionEvent e) {
f.dispatchEvent(new WindowEvent(
f, WindowEvent.WINDOW_CLOSING));
}
};
private JButton b = new JButton(exit);
附錄:根據修訂后的代碼,這是退出該計划的一種方法。 注意類名通常以大寫字母開頭,而實例名稱以小寫字母開頭。
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
insert.dispatchEvent(new WindowEvent(
insert, WindowEvent.WINDOW_CLOSING));
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
insert = new Insert();
insert.setVisible(true);
}
});
}
private static Insert insert;
...
很好地使用foo.setVisible(false)
,只需將其更改為setVisible(false)
,它就可以了。
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