如何解决带有响应式 UI 的 Swing
我有一个主类、一个 UI 类和一个处理从 UI 到主回调的接口:
主要内容:
package clascomms;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author stef
*/
public class ClassComms implements Handler{
private final ClassCommsUi ui;
public ClassComms() {
// private final ClassCommsUi ui;
ui = new ClassCommsUi(this,"Click1","Click2");
}
@Override
public void btn1Clicked(){
try {
// this code should run if button 1 is clicked
Thread.sleep(5000);
} catch (InterruptedException ex) {
Logger.getLogger(ClassComms.class.getName()).log(Level.SEVERE,null,ex);
}
System.out.println("bt1Clicked");
}
@Override
public void btn2Clicked(){
// this code should run if button 2 is clicked
System.out.println("bt2Clicked");
}
public static void main(String[] args) {
ClassComms thisOne = new ClassComms();
}
}
界面:
package clascomms;
/**
*
* @author stef
*/
public class ClassCommsUi extends javax.swing.JFrame {
private Handler mainClass;
public ClassCommsUi(Handler mainClass,String btn1,String btn2) {
this.mainClass = mainClass;
initComponents();
jButton1.setText(btn1);
jButton2.setText(btn2);
this.setVisible(true);
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
setDefaultCloSEOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("jButton2");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(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()
.addGap(26,26,26)
.addComponent(jButton1)
.addGap(27,27,27)
.addComponent(jButton2)
.addContainerGap(33,Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(26,26)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton1)
.addComponent(jButton2))
.addContainerGap(28,Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// Todo add your handling code here:
// If this action happens,method btn1Clicked() in main Class should be called
mainClass.btn1Clicked();
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// Todo add your handling code here:
// If this action happens,method btn2Clicked() in main Class should be called
mainClass.btn2Clicked();
}
public void quit(){}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
// End of variables declaration
}
最后是界面:
package clascomms;
/**
*
* @author stef
*/
public interface Handler {
public void btn1Clicked();
public void btn2Clicked();
}
如你所见,主类中有一个 5 秒的 Thread.sleep()... 当我点击按钮时,它会一直按下直到睡眠结束 - 用户界面保持 100% 无响应。 是否有一种简单(NOOB 在这里...)的方法来让 UI 保持响应?
解决方法
您正在阻止 EDT(事件调度线程)。所有与 Swing 相关的代码都在 EDT 上运行,其中包括您的 actionPerformed
。尝试在后台线程上休眠。
@Override
public void btn1Clicked(){
new SwingWorker<Void,Void>() {
@Override
protected void doInBackground() throws Exception {
try {
Thread.sleep(5000);
} catch (InterruptedException ex) {
Logger.getLogger(ClassComms.class.getName()).log(Level.SEVERE,null,ex);
}
System.out.println("bt1Clicked");
}
}().execute();
}
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