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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
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*
* This code is distributed in the hope that it will be useful , but WITHOUT
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* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
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* questions .
*/
/* @test
@ bug 8215396
@ key headful
@ summary Verifies JTabbedPane preferred size calculation is wrong
for SCROLL_TAB_LAYOUT .
@ run main TabProb
*/
import java.awt.Component;
import java.awt.Container;
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.LayoutManager;
import java.awt.Insets;
import java.awt.Robot;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class TabProb extends JFrame {
static TabProb tb1;
static TabProb tb2;
class FixLayout implements LayoutManager {
@Override
public void layoutContainer(Container C) {
Insets in = C.getInsets();
int w = 200 - in.left - in.right;
int h = 100 - in.top - in.bottom;
C.getComponents()[0 ].setBounds(in.top, in.left, w, h);
}
@Override
public Dimension minimumLayoutSize(Container C) {
return new Dimension(200 , 100 );
}
@Override
public Dimension preferredLayoutSize(Container C) {
return new Dimension(200 , 100 );
}
@Override
public void removeLayoutComponent(Component c) {
}
@Override
public void addLayoutComponent(String s, Component c) {
}
}
public TabProb(int layoutPolicy) {
JTabbedPane tabpanel = new JTabbedPane();
tabpanel.setTabPlacement(JTabbedPane.TOP);
tabpanel.setTabLayoutPolicy(layoutPolicy);
JPanel panel = new JPanel(new FixLayout());
JLabel label = new JLabel("Label" );
label.setBorder(BorderFactory.createLineBorder(Color.green, 3 ));
panel.add(label);
tabpanel.add("TEST" , panel);
add(tabpanel, BorderLayout.CENTER);
setUndecorated(true );
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
public static void main(String[] args) throws Exception {
for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
System.out.println("Test for LookAndFeel " + laf.getClassName());
UIManager.setLookAndFeel(laf.getClassName());
test();
System.out.println("Test passed for LookAndFeel " + laf.getClassName());
}
}
public static void test() throws Exception {
Robot robot = new Robot();
SwingUtilities.invokeAndWait(new Runnable() {
@Override
public void run() {
tb1 = new TabProb(JTabbedPane.SCROLL_TAB_LAYOUT);
tb1.pack();
tb1.setVisible(true );
tb2 = new TabProb(JTabbedPane.WRAP_TAB_LAYOUT);
tb2.pack();
tb2.setVisible(true );
}
});
double tb1height = tb1.getPreferredSize().getHeight();
double tb2height = tb2.getPreferredSize().getHeight();
System.out.println(tb1height);
System.out.println(tb2height);
robot.waitForIdle();
robot.delay(2000 );
SwingUtilities.invokeAndWait(() -> tb1.dispose());
SwingUtilities.invokeAndWait(() -> tb2.dispose());
if (tb1height != tb2height) {
throw new RuntimeException("JTabbedPane preferred size calculation is wrong for SCROLL_TAB_LAYOUT" );
}
}
}
Messung V0.5 in Prozent C=57 H=99 G=80
¤ Dauer der Verarbeitung: 0.0 Sekunden
(vorverarbeitet am 2026-10-11)
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