Java：如何重置 JFrame？
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Java: How to reset a JFrame?
提问by DANIELBMZ
setVisible currently use to restart the methods, but the transition does a flashing, is there any instruction other than setVisible? leave it in its initial state. reset button on the last Frame_1 only to return to the initial state.
setVisible 目前用于重启方法，但是transition 会闪烁，除了setVisible 之外还有什么指令吗？将其保留在初始状态。最后 Frame_1 上的 reset 按钮只能返回到初始状态。
public class frame_1 extends javax.swing.JFrame {
private void btnfinishActionPerformed(java.awt.event.ActionEvent evt) {
Period total = new Period(0, totalDuration, PeriodType.yearMonthDay());
txta.append("________________________________________________" + "\n");
txta.append("Duracion total: " + total.getYears() + " years " + total.getMonths() + " Months " + total.getDays() + " Days " + "\n");
txtini.setText(null);
txtfin.setText(null);
}
private void btnaddActionPerformed(java.awt.event.ActionEvent evt) {
period();
txtini.setText(null);
String fu = principio.txtingresa.getText();
txtfin.setText(fu);
}
public void period(){
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
String startDate = txtini.getText();
String endDate = txtfin.getText();
Date start = null;
Date end = null;
try {
start = sdf.parse(startDate);
end = sdf.parse(endDate);
} catch (ParseException ex) {
Logger.getLogger(fecha_1.class.getName()).log(Level.SEVERE, null, ex);
}
if(end.getTime() < start.getTime()){
JOptionPane.showMessageDialog(null, "the date finish y higher.!");
txtini.setText(null);
txtfin.setText(null);
}else{
long duration = end.getTime() - start.getTime();
Period period = new Period(0, duration, PeriodType.yearMonthDay());
txta.append(startDate + " - "+ endDate + " = " + period.getYears()+ " years " + period.getMonths() + " Months " + period.getDays() + " Days " + "\n");
totalDuration += duration;
}
txtini.requestFocusInWindow();
}
private void btnrestartActionPerformed(java.awt.event.ActionEvent evt) {
frame_1 obj1 = new frame_1();
obj1.setVisible(false);
obj1.setVisible(true);
}
}
回答by Hovercraft Full Of Eels
Based on your presented code, your reset button could be as simple as...
根据您提供的代码，您的重置按钮可能很简单...
private void btnrestartActionPerformed(java.awt.event.ActionEvent evt) {
txta.setText("");
txtini.setText("");
txtfin.setText("");
// here you have to initialize any other GUI fields and
// any non-gui fields that need it.
}
回答by ControlAltDel
I think what you want is
我想你想要的是
JFrame.getContentPane().invalidate();
JFrame.getContentPane().validate();
JFrame.getContentPane().repaint();
