我用windowbuilder親以在GuiTest類的大部分代碼下面用「////////」到我添加右線的異常(或改變)。 WindowBuilder Pro(一種所見即所得)不斷向構造函數中添加代碼 - 但還沒有投訴我進行修改。我想用這種方式繼續使用WindowBuilder Pro,所以我不想更改GUI的一般體系結構。更新一個的Java Swing的JList
我還在下面創建了一個DataTest類來模擬收集數據集的某個緩慢過程。
這是我的問題: 我想要做的就是用DataTest類中的新數據更新JList。
GuiTest類:
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.ListSelectionModel;
import javax.swing.border.EmptyBorder;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener; ///////////
import javax.swing.JList;
import javax.swing.JLabel;
import discoverTool.DataTest;
public class GuiTest extends JFrame implements ListSelectionListener{
private String[] foo = {"thing1","thing2","thing3"}; //////////////
private JPanel contentPane;
private JLabel lblNewLabel; //////////////made global
/**
* Launch the application.
* @throws InterruptedException
*/
public static void main(String[] args) throws InterruptedException {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
GuiTest frame = new GuiTest();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
DataTest dt = new DataTest();/////////////
GuiTest gt = new GuiTest();
gt.foo = dt.foo;
gt.updateJList(dt.foo);
}
public void updateJList(String[] f){
//reset the list with f
}
/**
* Create the frame.
*/
public GuiTest() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JList list = new JList(foo);
list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); /////////////
list.setSelectedIndex(0); //////////////
list.addListSelectionListener(this); //////////////
list.setBounds(10, 11, 134, 240);
contentPane.add(list);
JPanel panel = new JPanel();
panel.setBounds(154, 11, 188, 81);
contentPane.add(panel);
panel.setLayout(null);
//JLabel lblNewLabel = new JLabel("New label");/////////
lblNewLabel = new JLabel("New label");///////////
lblNewLabel.setBounds(10, 11, 46, 14);
panel.add(lblNewLabel);
}
public void valueChanged(ListSelectionEvent e) {///////////////
JList jList = (JList)e.getSource();////////////
lblNewLabel.setText(foo[jList.getSelectedIndex()]);///////////
}///////////
}
數據測試類:
public class DataTest {
public String[] foo;
public DataTest() throws InterruptedException{
//simulate a long process getting data;
Thread.sleep(7000);
foo = new String[4];
foo[0]="hey";
foo[1]="hi";
foo[2]="bye";
foo[3]="adios";
}
}
WindowBuilder不限於絕對座標;它可以讓你使用所有常見的佈局管理器:GridBagLayout,MiGLayout,SpringLayout,FormLayout,GroupLayout等。如果你手工編寫了很多的GUI代碼,你應該試一試。 – rob 2012-03-27 19:29:45