valueselect.java

来自「Typing fingers Typing programme」· Java 代码 · 共 38 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

/**	This class is a combination of label and combobox.Allows the user to select value
*	from a number of choices.
*/

class ValueSelect extends JPanel{
	private final JComboBox combo;
	private String value;
	ValueSelect(String cap,String values[]){
		super(new BorderLayout());
		add(new DialogLabel(cap),BorderLayout.WEST);
		JPanel p=new JPanel(new FlowLayout(FlowLayout.LEFT));
		p.add(combo=new JComboBox(values));
		add(p,BorderLayout.EAST);
		combo.addItemListener(new ItemListener(){
			public void itemStateChanged(ItemEvent i){
				value=(String)combo.getSelectedItem();
			}
		});
	}
	public void addItem(String s){
		combo.addItem(s);
	}
	public void setSelectedItem(String s){
		try{
			combo.setSelectedItem(s);
			value=(String)combo.getSelectedItem();
		}catch(Exception e){}
	}
	public String getValue(){
		return value;
	}
}