Thread: timer Uses a lot of hardware resources

HI
why wen i use timer for show time in jlabel Uses a lot of hardware resources? Approximately 35% of the CPU (cor i7)and 170MG of ram
How can I reduce this amount after using the timer?
this is my code

 
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.Timer;
 
public class NewJFrame extends javax.swing.JFrame {
 
 
    public NewJFrame() {
        initComponents();
        time();
    }
 
 
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {
 
        jLabel1 = new javax.swing.JLabel();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
 
        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(182, 182, 182)
                .addComponent(jLabel1)
                .addContainerGap(184, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(138, 138, 138)
                .addComponent(jLabel1)
                .addContainerGap(148, Short.MAX_VALUE))
        );
 
        pack();
    }// </editor-fold>                        
 
    public void time() {
        new Timer(0, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                Date d = new Date();
                SimpleDateFormat s = new SimpleDateFormat("HH:mm:ss");
                jLabel1.setText(s.format(d));                 //time= jlabel 
            }
        }).start();
    }
 
    public static void main(String args[]) {
 
        //<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(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
 
 
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame().setVisible(true);
            }
        });
    }
 
    // Variables declaration - do not modify                     
    private javax.swing.JLabel jLabel1;
    // End of variables declaration                   
}

Why is the delay for the timer set at 0 milliseconds?

The time display in your code shows seconds as the smallest unit of time. Changing the display continuously with no delay makes no sense.
The delay could be 500 ms and the change in the displayed seconds would be as fast as a human could detect.
Try that value and see if you can detect any error in the display.

does it cause disturbance in real time?

Sorry, I do not understand. Please explain.

The time comes from the Date object. The Timer control how frequently the time is displayed. Change the delay to 5000 ms and see if the time is correctly displayed every 5 seconds.