java swing

Question

用swing怎样写一个对话框，里面有一个列表，选择列表中的一个，点击确定，返回选定的内容，之后对话框消失。

Answer 1

给你贴一个简单的实例,你参考一下吧package swing.JComboBox;import javax.swing.*;import java.awt.*;
import java.awt.event.*;public class CityDialog extends JDialog{
// private String [] cities={
// "北京","上海","南京","深圳","济南","沈阳","苏州","杭州","常州"
// };
    private  JFrame parent;
private City[] cities=null;
private JComboBox comboBox=new JComboBox();
    private JButton jBtn=new JButton("确认"); public CityDialog(JFrame parent){
this.parent=parent;
//添加几个数据
cities=new City[3];
cities[0]=new City(1,"北京");
cities[1]=new City(2,"上海");
cities[2]=new City(3,"广州"); for(int i=0;i<cities.length;i++){
comboBox.addItem(cities[i]);
} comboBox.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub City selectCity=(City)comboBox.getSelectedItem();
System.out.println(selectCity.getId()+selectCity.getName());
} }); comboBox.setEditable(true); Container contentPane=this.getContentPane();
contentPane.setLayout(new FlowLayout());
contentPane.add(comboBox);        jBtn.addActionListener(new ActionListener(){            @Override
            public void actionPerformed(ActionEvent e) {
                City selectCity=(City)comboBox.getSelectedItem();
                JOptionPane.showMessageDialog(null,"所选城市为"+selectCity.getName());
                dispose();
            }
        });
        contentPane.add(jBtn);
        this.pack(); }    /**
 * @param args
 */
public static void main(String[] args) {
// TODO Auto-generated method stub
        JFrame frame=new JFrame("Demo");
        JButton btn=new JButton("选择城市");
        final CityDialog cityDialog=new CityDialog(frame);
        btn.addActionListener(new ActionListener(){            @Override
            public void actionPerformed(ActionEvent e) {
                //To change body of implemented methods use File | Settings | File Templates.
                cityDialog.setVisible(true);
            }
        });
        frame.getContentPane().add(btn);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
new CityDialog(frame);
}
}
class City{
int id;
String name;

public City(int id ,String name){
this.id=id;
this.name=name;
} public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
}

public String toString(){
return this.name;
}

}

Answer 2

这个要一个子窗体实现  如果是子窗体相信你就会写了 至于父子窗体的写法参考一下从别处复制过来的代码import javax.swing.*; 
import java.awt.*; 
import javax.swing.event.*; 
import java.awt.event.*; public class move extends JFrame{ 
Container con=getContentPane(); 
JDesktopPane p=new JDesktopPane(); 
move(){ 
setTitle("主窗体"); 
childframe f=new childframe("子窗体",true,true,true); 
con.add(p); 
p.add(f); 
setSize(300,300); 
setVisible(true); 
} 
public static void main(String[] args){ 
move moveframe=new move(); 
} 
} 
class childframe extends JInternalFrame implements Runnable{ 
private static int x=0,y=-200; 
Thread t;  
childframe(String title, boolean resizable, boolean closable, boolean maximizable){ 
t=new Thread(this); 
this.resizable=resizable; 
this.closable=closable; 
this.maximizable=maximizable; 
setSize(200,200); 
setTitle(title); 
setBackground(Color.BLUE); 
show(); 
t.start(); 
} 
public void run(){ 
try{ 
while(y<=0){ 
setLocation(x,y); 
y+=4; 
t.sleep(30); 
} 
} 
catch(InterruptedException IE){ 
System.out.println("线程被中断!!!"); 
} 
} 
} 

Answer 3

JOptionPane 就可以JOptionPane.showInputDialog(null, "Please choose a name", "Example 1",
        JOptionPane.QUESTION_MESSAGE, null, new Object[] { "Amanda",
            "Colin", "Don", "Fred", "Gordon", "Janet", "Jay",
            "Joe", "Judie", "Kerstin", "Lotus", "Maciek", "Mark",
            "Mike", "Mulhern", "Oliver", "Peter", "Quaxo", "Rita",
            "Sandro", "Tim", "Will" }, "Joe");

Answer 4

也可以选择 http://code.google.com/p/oxbow/提供的 TaskDialog