[英]output to be displayed in a tabbed window using Java Swing
我在java中為linux開發了一個任務管理器。 現在的輸出顯示在控制台中,而選項卡窗口則單獨顯示(這是使用java swing完成的)。 現在我希望控制台的輸出顯示在選項卡窗口中。 我該怎么做? 有一些我用過的課程。 一個用於任務管理器功能,另一個用於GUI。 我已經粘貼在某些編碼下方,以幫助我解決問題。
**TabbedPaneDemo1.java**
package components;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.Writer;
import java.util.Iterator;
import java.util.List;
/*
* TabbedPaneDemo.java requires one additional file:
* images/middle.gif.
*/
import javax.swing.JTabbedPane;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JComponent;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.TextArea;
import java.awt.event.KeyEvent;
import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
public class TabbedPaneDemo1
{
public static void main(String args[]) throws Exception
{
try
{
TextArea textarea = new TextArea();
TabbedPaneDemo obj = new TabbedPaneDemo();
obj.fn();
String line;
String result = "";
FileOutputStream out;
//FileOutputStream out; // declare a file output object
PrintStream p;
Process p1 = Runtime.getRuntime().exec("tasklist.exe");
out = new FileOutputStream("myfile.txt");//write to a file//
p = new PrintStream( out );
BufferedReader input = new BufferedReader(new InputStreamReader(p1.getInputStream()));//read form a file//
while ((line = input.readLine()) != null)
{
System.out.println(line);
//textarea.append(line + "\n");
result += line+"\n";
p.println (line);
//textarea.setVisible(true);
}
//msgBox(result);
p.close();
input.close();
}
catch(Exception e)
{
}
}
public static void msgBox(String msg) {
javax.swing.JOptionPane.showConfirmDialog((java.awt.Component)
null, msg, "WindowsUtils",
javax.swing.JOptionPane.DEFAULT_OPTION);
}
}
**TabbedPaneDemo.java**
package components;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.KeyEvent;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.JTabbedPane;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JComponent;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.JTextField;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.KeyEvent;
public class TabbedPaneDemo extends JPanel {
Integer i;
public TabbedPaneDemo() {
super(new GridLayout(1, 1));
JTabbedPane tabbedPane = new JTabbedPane();
ImageIcon icon = createImageIcon("images");
JComponent panel1 = makeTextPanel("tasklist");
tabbedPane.addTab("tasks", icon, panel1,
"ta");
tabbedPane.setMnemonicAt(0, KeyEvent.VK_1);
JComponent panel2 = makeTextPanel("windows");
tabbedPane.addTab("wins", icon, panel2,
"wi");
tabbedPane.setMnemonicAt(1, KeyEvent.VK_2);
add(tabbedPane);`enter code here`
tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
}
protected JComponent makeTextPanel(String text)
{
JPanel panel = new JPanel(false);
JLabel filler = new JLabel(text);
filler.setHorizontalAlignment(JLabel.CENTER);
panel.setLayout(new GridLayout(1, 1));
panel.add(filler);
return panel;
}
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = TabbedPaneDemo.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
private static void createAndShowGUI() {
JFrame frame = new JFrame("TabbedPaneDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TabbedPaneDemo(), BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
public static void fn() {
SwingUtilities.invokeLater(new Runnable() {
public void run()
{
UIManager.put("swing.boldMetal", Boolean.FALSE);
createAndShowGUI();
}
});
}
}
如果你使用swing來創建一個JTabbedPane
,用內容更新它的最簡單方法是向它添加一個JTextArea,如下所示:
tab.add(textarea);
然后用您要顯示的任何內容更新textarea
textarea.setText(); // or append();
要通過流從控制台添加輸入,請執行以下操作:
BufferedReader input = new BufferedReader(
new InputStreamReader(consoleProcess.getInputStream()));
String text;
while ((text = input.readLine()) != null)
{
textarea.append(text + "\n");
}
input.close();
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