Java - Change JLabel Font Size

How To Change JLabel Font Size Using JSlider In Java NetBeans

java change jlabel font size



In this Java Tutorial we will see How To Change A JLabel Text Font Size Using A JSlider So The Image Size Will Depend On The JSider Value using Java NetBeans .




Project Source Code:

package javaapplication1;

import java.awt.BorderLayout;
import java.awt.Font;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;

/**
 *
 * @author 1BestCsharp
 */
public class Java_JSider_Resize_Text extends javax.swing.JFrame {

    /**
     * Creates new form Java_JSider_Resize_Text
     */
    public Java_JSider_Resize_Text() {
        initComponents();
        jPanel1.setLayout(new BorderLayout());
        lbl.setHorizontalAlignment(SwingUtilities.CENTER);
        lbl.setVerticalAlignment(SwingUtilities.CENTER);
        jPanel1.add(lbl, BorderLayout.CENTER);
        jSlider_FontSize.setValue(lbl.getFont().getSize());
    }

    JLabel lbl = new JLabel("Message");
    
    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jSlider_FontSize = new javax.swing.JSlider();
        jPanel1 = new javax.swing.JPanel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jSlider_FontSize.setFont(new java.awt.Font("Tahoma", 1, 14)); // NOI18N
        jSlider_FontSize.setForeground(new java.awt.Color(51, 51, 255));
        jSlider_FontSize.setMajorTickSpacing(10);
        jSlider_FontSize.setMaximum(150);
        jSlider_FontSize.setPaintLabels(true);
        jSlider_FontSize.setPaintTicks(true);
        jSlider_FontSize.addChangeListener(new javax.swing.event.ChangeListener() {
            public void stateChanged(javax.swing.event.ChangeEvent evt) {
                jSlider_FontSizeStateChanged(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 0, Short.MAX_VALUE)
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 352, Short.MAX_VALUE)
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jSlider_FontSize, javax.swing.GroupLayout.DEFAULT_SIZE, 645, Short.MAX_VALUE)
                .addContainerGap())
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addComponent(jSlider_FontSize, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

    private void jSlider_FontSizeStateChanged(javax.swing.event.ChangeEvent evt) {                                              
        
        lbl.setFont(new Font(lbl.getFont().getName(), lbl.getFont().getStyle(), jSlider_FontSize.getValue()));
        
    }                                             

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Java_JSider_Resize_Text.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Java_JSider_Resize_Text.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Java_JSider_Resize_Text.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Java_JSider_Resize_Text.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Java_JSider_Resize_Text().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JPanel jPanel1;
    private javax.swing.JSlider jSlider_FontSize;
    // End of variables declaration                   
}



///////////////OUTPUT:



java change jabel font size using jslider

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