Re: Layout Doesn't Work

On Wednesday, August 8, 2012 12:24:39 PM UTC-4, (unknown) wrote:


It gave me confusing results. It was like the project ran too fast to ever display the label. I thought this was nonsense, so I created the below project.

The big question now becomes how do I (using the below project) get jLabel1 to be visible while the project is executing in the for loops?

Information about 3 of my button clicks:

Start run jLabel1 is visible :-)

(1st button press)
jLabel1 disappears at end of method and never comes back up!

(2nd button press)
jLabel1 never is seen

(3rd button press)
jLabel1 never is seen

//Code:

package hide_show_label_with_icon;

import java.util.logging.Level;
import java.util.logging.Logger;

public class Hide_Show_Label_with_Icon extends javax.swing.JFrame {

    public Hide_Show_Label_with_Icon() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setText("jButton1");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jLabel1.setText("jLabel1");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(46, 46, 46)
                .addComponent(jButton1)
                .addGap(60, 60, 60)
                .addComponent(jLabel1)
                .addContainerGap(233, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(270, 270, 270)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton1)
                    .addComponent(jLabel1))
                .addContainerGap(36, Short.MAX_VALUE))
        );

        pack();
    }

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        System.out.println("jLabel1.isVisible is " + jLabel1.isVisible());
        
        jLabel1.setVisible(true);
        
        for (int i = 0;i < 100000; i++)
            for (int i2 = 0;i2 < 100000; i2++);
                for (int i3 = 0;i3 < 100000; i3++);
 
        System.out.println("jLabel1.isVisible is " + jLabel1.isVisible());
        jLabel1.setVisible(false);
        System.out.println("Done");
        System.out.println();
 
    }

    public static void main(String args[]) {

        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new Hide_Show_Label_with_Icon().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    // End of variables declaration
}