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--- swing:labels [2015/05/11 03:59]
gthanos
+++ swing:labels [2017/04/04 15:55]
gthanos
@@ Line 18: / Line 18: @@
   public static void main(String[] args) {
-    LabelGreeting lg = new LabelGreeting();
+    javax.swing.SwingUtilities.invokeLater(new Runnable() {
-    lg.setVisible(true);
+      public void run() {
+       LabelGreeting lg = new LabelGreeting();
+       lg.setVisible(true);
+      }
+    });
   }
 }
@@ Line 38: / Line 42: @@
 void setVerticalTextPosition(int textPosition)
 //Sets the vertical position of the label's text, relative to its image.
+</code>
+Δείτε το παρακάτω παράδειγμα από το site της Oracle και μεταβάλλετε τις παραμέτρους. Παρατηρήστε πως μπορείτε να προσθέσετε HTML κείμενο σε ένα αντικείμενο τύπου Label.
+<code java LabelDemo.java>
+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+/*
+ * LabelDemo.java needs one other file:
+ *   images/middle.gif
+ */
+public class LabelDemo extends JPanel {
+  public LabelDemo() {
+    super(new GridLayout(3,1));  //3 rows, 1 column
+    JLabel label1, label2, label3, label4;
+    ImageIcon icon = createImageIcon("images/middle.gif",
+                     "a pretty but meaningless splat");
+    //setLayout(new BoxLayout(this,BoxLayout.Y_AXIS));
+    //Create the first label.
+    label1 = new JLabel("Image and Text",
+              icon,
+              JLabel.LEFT);
+    //Set the position of its text, relative to its icon:
+    label1.setVerticalTextPosition(JLabel.BOTTOM);
+    label1.setHorizontalTextPosition(JLabel.CENTER);
+    label1.setBorder(BorderFactory.createLineBorder(Color.BLACK));
+    //Create the other labels.
+    label2 = new JLabel("Text-Only Label");
+    //label2.setHorizontalAlignment(JLabel.RIGHT);
+    label2.setBorder(BorderFactory.createLineBorder(Color.BLACK));
+    label3 = new JLabel(icon);
+    label3.setBorder(BorderFactory.createLineBorder(Color.BLACK));
+    label4 = new JLabel("<html><font size='12pt' color='red'>HTML text</font></html>", JLabel.RIGHT);
+    label4.setBorder(BorderFactory.createLineBorder(Color.BLACK));
+    //Create tool tips, for the heck of it.
+    label1.setToolTipText("A label containing both image and text");
+    label2.setToolTipText("A label containing only text");
+    label3.setToolTipText("A label containing only an image");
+    //Add the labels.
+    add(label1);
+    add(label2);
+    add(label3);
+    add(label4);
+  }
+  /** Returns an ImageIcon, or null if the path was invalid. */
+  protected static ImageIcon createImageIcon(String path,
+                         String description) {
+    java.net.URL imgURL = LabelDemo.class.getResource(path);
+    if (imgURL != null) {
+      return new ImageIcon(imgURL, description);
+    } else {
+      System.err.println("Couldn't find file: " + path);
+      return null;
+    }
+  }
+  /**
+   * Create the GUI and show it.  For thread safety,
+   * this method should be invoked from the
+   * event dispatch thread.
+   */
+  private static void createAndShowGUI() {
+    //Create and set up the window.
+    JFrame frame = new JFrame("LabelDemo");
+    frame.setSize(400,300);
+    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+    //Add content to the window.
+    frame.add(new LabelDemo());
+    //Display the window.
+    //frame.pack();
+    frame.setVisible(true);
+  }
+  public static void main(String[] args) {
+    //Schedule a job for the event dispatch thread:
+    //creating and showing this application's GUI.
+    SwingUtilities.invokeLater(new Runnable() {
+      public void run() {
+		//Turn off metal's use of bold fonts
+	    UIManager.put("swing.boldMetal", Boolean.FALSE);
+		createAndShowGUI();
+      }
+    });
+  }
+}
 </code>

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