Das Einfrieren des Java GUI-Fensters beim Start ist ein häufiges Problem, auf das viele Entwickler stoßen. In diesem Fall kann der Benutzer nichts tun und das Fenster sieht aus, als ob es feststeckt. Der Grund liegt im Allgemeinen darin, dass einige Vorgänge während des Fensterinitialisierungsprozesses zu lange dauern, was dazu führt, dass die Schnittstelle nicht normal reagiert. Um dieses Problem zu lösen, müssen wir die Ursache des Einfrierens finden und entsprechende Lösungen ergreifen. In diesem Artikel stellt der PHP-Editor Baicao einige gängige Lösungen vor, die Ihnen helfen, das Problem des Einfrierens beim Starten des Java-GUI-Fensters zu lösen.
Dies ist ein Autowasch-GUI-Programm. Enthält zwei Klassen Demo und Total, die nach der Berechnung die Summe in einem neuen Fenster anzeigen. Alles hat gut funktioniert, ich habe beschlossen, es noch einmal auszuführen, um den Screenshot einzureichen, aber es blieb hängen, als ob das Programm ausgeführt würde, aber das Fenster eingefroren wäre. Ich verwende die Net-Bean-Drag-and-Drop-Methode. Geben Sie hier eine Bildbeschreibung ein Demokurs
package car.wash_05;
public class demo extends javax.swing.jframe {
private double small_engine = 100.0;
private double big_engine = 200.0;
private double battery = 100.0;
private double oi_filter = 70.0;
private double brakes = 100.0;
private double gears = 100.0;
private double regular_wash = 50.0;
private double wash_compound = 100.0;
// declare variables to store the selected services
private boolean smallengineselected = false;
private boolean bigengineselected = false;
private boolean batteryselected = false;
private boolean oilandfilterselected = false;
private boolean brakesselected = false;
private boolean gearsselected = false;
private boolean regularwashselected = false;
private boolean washandcompoundselected = false;
// declare a variable to store the subtotal price
private double subtotal = 0.0;
public demo() {
system.out.println("before gui initialization");
initcomponents();
system.out.println("after gui initialization");
}
private void updatesubtotal() {
subtotal = 0.0;
if (smallengineselected)
subtotal += small_engine;
if (bigengineselected)
subtotal += big_engine;
if (batteryselected)
subtotal += battery;
if (oilandfilterselected)
subtotal += oi_filter;
if (brakesselected)
subtotal += brakes;
if (gearsselected)
subtotal += gears;
}
@suppresswarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="generated code">
private void initcomponents() {
jradiobutton2 = new javax.swing.jradiobutton();
jlabel1 = new javax.swing.jlabel();
jpanel1 = new javax.swing.jpanel();
jradiobutton1 = new javax.swing.jradiobutton();
jradiobutton3 = new javax.swing.jradiobutton();
jpanel2 = new javax.swing.jpanel();
jradiobutton4 = new javax.swing.jradiobutton();
jradiobutton5 = new javax.swing.jradiobutton();
jradiobutton6 = new javax.swing.jradiobutton();
jpanel3 = new javax.swing.jpanel();
jcheckbox1 = new javax.swing.jcheckbox();
jcheckbox2 = new javax.swing.jcheckbox();
jcheckbox3 = new javax.swing.jcheckbox();
jcheckbox4 = new javax.swing.jcheckbox();
jbutton1 = new javax.swing.jbutton();
jbutton2 = new javax.swing.jbutton();
jradiobutton2.settext("jradiobutton2");
setdefaultcloseoperation(javax.swing.windowconstants.exit_on_close);
settitle("auto tech and mech services");
setenabled(false);
jlabel1.settext("welcome to auto tech and mech services");
jpanel1.setborder(javax.swing.borderfactory.createetchedborder());
jpanel1.settooltiptext("");
jradiobutton1.settext("small");
jradiobutton1.addactionlistener(new java.awt.event.actionlistener() {
public void actionperformed(java.awt.event.actionevent evt) {
jradiobutton1actionperformed(evt);
}
});
jradiobutton3.settext("big");
jradiobutton3.addactionlistener(new java.awt.event.actionlistener() {
public void actionperformed(java.awt.event.actionevent evt) {
jradiobutton3actionperformed(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()
.addcontainergap()
.addgroup(jpanel1layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addcomponent(jradiobutton1)
.addcomponent(jradiobutton3))
.addcontainergap(10, short.max_value))
);
jpanel1layout.setverticalgroup(
jpanel1layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addgroup(jpanel1layout.createsequentialgroup()
.addgap(39, 39, 39)
.addcomponent(jradiobutton1)
.addgap(29, 29, 29)
.addcomponent(jradiobutton3)
.addcontainergap(javax.swing.grouplayout.default_size, short.max_value))
);
jpanel2.setborder(javax.swing.borderfactory.createetchedborder());
jpanel2.setname(""); // noi18n
jradiobutton4.settext("none");
jradiobutton4.addactionlistener(new java.awt.event.actionlistener() {
public void actionperformed(java.awt.event.actionevent evt) {
jradiobutton4actionperformed(evt);
}
});
jradiobutton5.settext("regular wash");
jradiobutton5.addactionlistener(new java.awt.event.actionlistener() {
public void actionperformed(java.awt.event.actionevent evt) {
jradiobutton5actionperformed(evt);
}
});
jradiobutton6.settext("wash & compound");
jradiobutton6.addactionlistener(new java.awt.event.actionlistener() {
public void actionperformed(java.awt.event.actionevent evt) {
jradiobutton6actionperformed(evt);
}
});
javax.swing.grouplayout jpanel2layout = new javax.swing.grouplayout(jpanel2);
jpanel2.setlayout(jpanel2layout);
jpanel2layout.sethorizontalgroup(
jpanel2layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addgroup(jpanel2layout.createsequentialgroup()
.addgroup(jpanel2layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addcomponent(jradiobutton4)
.addcomponent(jradiobutton5)
.addcomponent(jradiobutton6))
.addgap(0, 0, short.max_value))
);
jpanel2layout.setverticalgroup(
jpanel2layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addgroup(jpanel2layout.createsequentialgroup()
.addgap(28, 28, 28)
.addcomponent(jradiobutton4)
.addgap(28, 28, 28)
.addcomponent(jradiobutton5)
.addpreferredgap(javax.swing.layoutstyle.componentplacement.related, javax.swing.grouplayout.default_size, short.max_value)
.addcomponent(jradiobutton6)
.addgap(14, 14, 14))
);
jpanel3.setborder(javax.swing.borderfactory.createetchedborder());
jpanel3.settooltiptext("");
jpanel3.setname(""); // noi18n
jcheckbox1.settext("battery");
jcheckbox1.addactionlistener(new java.awt.event.actionlistener() {
public void actionperformed(java.awt.event.actionevent evt) {
jcheckbox1actionperformed(evt);
}
});
jcheckbox2.settext("oil filters");
jcheckbox2.addactionlistener(new java.awt.event.actionlistener() {
public void actionperformed(java.awt.event.actionevent evt) {
jcheckbox2actionperformed(evt);
}
});
jcheckbox3.settext("brakes");
jcheckbox3.addactionlistener(new java.awt.event.actionlistener() {
public void actionperformed(java.awt.event.actionevent evt) {
jcheckbox3actionperformed(evt);
}
});
jcheckbox4.settext("gear");
jcheckbox4.addactionlistener(new java.awt.event.actionlistener() {
public void actionperformed(java.awt.event.actionevent evt) {
jcheckbox4actionperformed(evt);
}
});
javax.swing.grouplayout jpanel3layout = new javax.swing.grouplayout(jpanel3);
jpanel3.setlayout(jpanel3layout);
jpanel3layout.sethorizontalgroup(
jpanel3layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addgroup(jpanel3layout.createsequentialgroup()
.addcontainergap()
.addgroup(jpanel3layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addcomponent(jcheckbox1)
.addcomponent(jcheckbox2)
.addcomponent(jcheckbox3)
.addcomponent(jcheckbox4))
.addcontainergap(105, short.max_value))
);
jpanel3layout.setverticalgroup(
jpanel3layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addgroup(jpanel3layout.createsequentialgroup()
.addgap(19, 19, 19)
.addcomponent(jcheckbox1)
.addgap(18, 18, 18)
.addcomponent(jcheckbox2)
.addgap(18, 18, 18)
.addcomponent(jcheckbox3)
.addgap(18, 18, 18)
.addcomponent(jcheckbox4)
.addcontainergap(8, short.max_value))
);
jbutton1.settext("calculate");
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 layout = new javax.swing.grouplayout(getcontentpane());
getcontentpane().setlayout(layout);
layout.sethorizontalgroup(
layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addgroup(layout.createsequentialgroup()
.addcontainergap()
.addcomponent(jpanel1, javax.swing.grouplayout.preferred_size, javax.swing.grouplayout.default_size, javax.swing.grouplayout.preferred_size)
.addpreferredgap(javax.swing.layoutstyle.componentplacement.related)
.addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addcomponent(jlabel1)
.addgroup(layout.createsequentialgroup()
.addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.trailing, false)
.addgroup(layout.createsequentialgroup()
.addcomponent(jbutton1)
.addpreferredgap(javax.swing.layoutstyle.componentplacement.related, javax.swing.grouplayout.default_size, short.max_value)
.addcomponent(jbutton2))
.addcomponent(jpanel3, javax.swing.grouplayout.preferred_size, javax.swing.grouplayout.default_size, javax.swing.grouplayout.preferred_size))
.addpreferredgap(javax.swing.layoutstyle.componentplacement.related)
.addcomponent(jpanel2, javax.swing.grouplayout.preferred_size, javax.swing.grouplayout.default_size, javax.swing.grouplayout.preferred_size)))
.addcontainergap(javax.swing.grouplayout.default_size, short.max_value))
);
layout.setverticalgroup(
layout.createparallelgroup(javax.swing.grouplayout.alignment.leading)
.addgroup(layout.createsequentialgroup()
.addgap(12, 12, 12)
.addcomponent(jlabel1)
.addpreferredgap(javax.swing.layoutstyle.componentplacement.unrelated)
.addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.trailing, false)
.addcomponent(jpanel3, javax.swing.grouplayout.alignment.leading, javax.swing.grouplayout.default_size, javax.swing.grouplayout.default_size, short.max_value)
.addcomponent(jpanel1, javax.swing.grouplayout.alignment.leading, javax.swing.grouplayout.default_size, javax.swing.grouplayout.default_size, short.max_value)
.addcomponent(jpanel2, javax.swing.grouplayout.default_size, javax.swing.grouplayout.default_size, short.max_value))
.addpreferredgap(javax.swing.layoutstyle.componentplacement.related)
.addgroup(layout.createparallelgroup(javax.swing.grouplayout.alignment.baseline)
.addcomponent(jbutton1)
.addcomponent(jbutton2))
.addcontainergap(javax.swing.grouplayout.default_size, short.max_value))
);
jpanel1.getaccessiblecontext().setaccessiblename("");
jpanel2.getaccessiblecontext().setaccessiblename("");
pack();
}// </editor-fold>
//small engine ratio button
private void jradiobutton1actionperformed(java.awt.event.actionevent evt) {
smallengineselected = true;
bigengineselected = false;
jradiobutton3.setselected(false);
updatesubtotal();
}
//big engine ratio button
private void jradiobutton3actionperformed(java.awt.event.actionevent evt) {
bigengineselected = true;
smallengineselected = false;
jradiobutton1.setselected(false);
updatesubtotal();
}
//oil filter check button
private void jcheckbox2actionperformed(java.awt.event.actionevent evt) {
oilandfilterselected = jcheckbox2.isselected();
updatesubtotal();
}
//none ration button
private void jradiobutton4actionperformed(java.awt.event.actionevent evt) {
washandcompoundselected = false;
regularwashselected = false ;
jradiobutton5.setselected(false);
jradiobutton6.setselected(false);
}
//battery check button
private void jcheckbox1actionperformed(java.awt.event.actionevent evt) {
batteryselected = jcheckbox1.isselected();
updatesubtotal();
}
//brakes check button
private void jcheckbox3actionperformed(java.awt.event.actionevent evt) {
brakesselected = jcheckbox3.isselected();
updatesubtotal();
}
//gear check button
private void jcheckbox4actionperformed(java.awt.event.actionevent evt) {
gearsselected = jcheckbox4.isselected();
updatesubtotal();
}
//rugular was ration button
private void jradiobutton5actionperformed(java.awt.event.actionevent evt) {
regularwashselected = true;
washandcompoundselected =false;
jradiobutton6.setselected(false);
updatesubtotal();
}
//wash and compound ration button
private void jradiobutton6actionperformed(java.awt.event.actionevent evt) {
washandcompoundselected = true;
regularwashselected = false;
jradiobutton5.setselected(false);
updatesubtotal();
}
//calculate button
private void jbutton1actionperformed(java.awt.event.actionevent evt) {
double total = subtotal + (subtotal * 0.1);
double tax=subtotal * 0.1;
total totalframe = new total(total, subtotal, tax);
totalframe.setvisible(true);
}
//exit button
private void jbutton2actionperformed(java.awt.event.actionevent evt) {
system.exit(0);
}
public static void main(string args[]) {
java.awt.eventqueue.invokelater(new runnable() {
public void run() {
new demo().setvisible(true);
}
});
}
// variables declaration - do not modify
private javax.swing.jbutton jbutton1;
private javax.swing.jbutton jbutton2;
private javax.swing.jcheckbox jcheckbox1;
private javax.swing.jcheckbox jcheckbox2;
private javax.swing.jcheckbox jcheckbox3;
private javax.swing.jcheckbox jcheckbox4;
private javax.swing.jlabel jlabel1;
private javax.swing.jpanel jpanel1;
private javax.swing.jpanel jpanel2;
private javax.swing.jpanel jpanel3;
private javax.swing.jradiobutton jradiobutton1;
private javax.swing.jradiobutton jradiobutton2;
private javax.swing.jradiobutton jradiobutton3;
private javax.swing.jradiobutton jradiobutton4;
private javax.swing.jradiobutton jradiobutton5;
private javax.swing.jradiobutton jradiobutton6;
// end of variables declaration
}Totale Klasse
package car.wash_05;
public class Total extends javax.swing.JFrame {
public Total() {
}
public Total(double tota, double subtota, double ta) {
initComponents();
jLabel1.setText("Subtotal: $" + subtota);
jLabel2.setText("tax: $" + ta);
jLabel3.setText("Total: $" + tota);
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Total");
jButton1.setText("Ok");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jLabel1.setText("jLabel1");
jLabel2.setText("jLabel2");
jLabel3.setText("jLabel3");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(32, 32, 32)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel2)
.addComponent(jLabel1)
.addComponent(jLabel3)))
.addGroup(layout.createSequentialGroup()
.addGap(101, 101, 101)
.addComponent(jButton1)))
.addContainerGap(105, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(20, Short.MAX_VALUE)
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel3)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jButton1)
.addContainerGap())
);
pack();
}// </editor-fold>
//ok button
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
this.dispose();
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Total().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
// End of variables declaration
}Ich habe versucht, die Prüfung hinzuzufügen, das System neu zu starten und Java neu zu installieren. Es funktioniert nicht. Es friert einfach ein und selbst die Schließen- und andere Schaltflächen funktionieren nicht. Die Auswahl muss im Task-Manager erzwungen werden.
In initcomponents 方法的第 75 行，您正在使用 setenabled(false) Dadurch werden das Fenster und alle seine untergeordneten Elemente (alle Komponenten im Rahmen) deaktiviert, sodass es sich anfühlt, als wäre Ihr Fenster eingefroren.
Um dieses Problem zu beheben, entfernen Sie einfach die Zeile aus dem folgenden Code setenabled(false)
/* rest of your code */
jradiobutton2.settext("jradiobutton2");
setdefaultcloseoperation(javax.swing.windowconstants.exit_on_close);
settitle("auto tech and mech services");
setenabled(false); //line causing this issue
jlabel1.settext("welcome to auto tech and mech services");
/* rest of your code */• Denken Sie an die Namenskonventionen! Vermeiden Sie die Benennung von Klassen demo.java，而是使用 demo.java.
• Zweitens benötigen Sie keine separate Methode, um die ausgeführte Aktion zu verarbeiten, sondern verschieben sie einfach direkt in den Aktions-Listener von button.addactionlistener.
• Drittens (und das ist eine persönliche Präferenz): Sie müssen -
nicht verwendenjava.awt.eventqueue.invokelater(new runnable() {
public void run() {
new demo().setvisible(true);
}
});Sie können diesen Code mit Lambda kürzen (mehr erfahren hier) und den Code wie unten gezeigt auf nur eine Zeile beschränken.
java.awt.EventQueue.invokeLater(() -> new Demo().setVisible(true));
Das obige ist der detaillierte Inhalt vonDas Java-GUI-Fenster friert beim Start ein. Für weitere Informationen folgen Sie bitte anderen verwandten Artikeln auf der PHP chinesischen Website!
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