how load selected value in to the combobox in java?

try this code

packagecom.javacoderanch.example.swing;
importjavax.swing.*;
importjava.awt.*;
importjava.awt.event.ActionListener;
importjava.awt.event.ActionEvent;
publicclassComboBoxSelectedItemextendsJFrame{
publicComboBoxSelectedItem(){
initialize();
}
privatevoidinitialize(){
setSize(300,300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(newFlowLayout(FlowLayout.LEFT));
//
//Createacomboboxwithfouritemsandsetittoeditablesothatusercan
//entertheirownvalue.
//
finalJComboBoxcomboBox=newJComboBox(newString[]{"One","Two","Three","Four"});
comboBox.setEditable(true);
getContentPane().add(comboBox);
//
//Createtwobuttonthatwillsettheselecteditemofthecombobox.The
//firstbuttonselect"Two"andandsecondbuttonselect"Four".
//
JButtonbutton1=newJButton("SetTwo");
getContentPane().add(button1);
button1.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
comboBox.setSelectedItem("Two");
}
});
JButtonbutton2=newJButton("SetFour");
getContentPane().add(button2);
button2.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
comboBox.setSelectedItem("Four");
}
});
//
//Createatextfieldfordisplayingtheselecteditemwhenwepressthe
//GetValuebutton.Whenuserentertheirownvaluetheselecteditem
//returnedisthestringthatenteredbyuser.
//
finalJTextFieldtextField=newJTextField("");
textField.setPreferredSize(newDimension(150,20));
JButtonbutton3=newJButton("GetValue");
getContentPane().add(button3);
getContentPane().add(textField);
button3.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
textField.setText((String)comboBox.getSelectedItem());
}
});
}
publicstaticvoidmain(String[]args){
SwingUtilities.invokeLater(newRunnable(){
publicvoidrun(){
newComboBoxSelectedItem().setVisible(true);
}
});
}
}

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Ajay Malik10y ago
try this code
packagecom.javacoderanch.example.swing;
importjavax.swing.*;
importjava.awt.*;
importjava.awt.event.ActionListener;
importjava.awt.event.ActionEvent;
publicclassComboBoxSelectedItemextendsJFrame{
publicComboBoxSelectedItem(){
initialize();
}
privatevoidinitialize(){
setSize(300,300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(newFlowLayout(FlowLayout.LEFT));
//
//Createacomboboxwithfouritemsandsetittoeditablesothatusercan
//entertheirownvalue.
//
finalJComboBoxcomboBox=newJComboBox(newString[]{"One","Two","Three","Four"});
comboBox.setEditable(true);
getContentPane().add(comboBox);
//
//Createtwobuttonthatwillsettheselecteditemofthecombobox.The
//firstbuttonselect"Two"andandsecondbuttonselect"Four".
//
JButtonbutton1=newJButton("SetTwo");
getContentPane().add(button1);
button1.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
comboBox.setSelectedItem("Two");
}
});
JButtonbutton2=newJButton("SetFour");
getContentPane().add(button2);
button2.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
comboBox.setSelectedItem("Four");
}
});
//
//Createatextfieldfordisplayingtheselecteditemwhenwepressthe
//GetValuebutton.Whenuserentertheirownvaluetheselecteditem
//returnedisthestringthatenteredbyuser.
//
finalJTextFieldtextField=newJTextField("");
textField.setPreferredSize(newDimension(150,20));
JButtonbutton3=newJButton("GetValue");
getContentPane().add(button3);
getContentPane().add(textField);
button3.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
textField.setText((String)comboBox.getSelectedItem());
}
});
}
publicstaticvoidmain(String[]args){
SwingUtilities.invokeLater(newRunnable(){
publicvoidrun(){
newComboBoxSelectedItem().setVisible(true);
}
});
}
}