Ave populus
ho questo sorgente:che compila regolarmente, ma quando lo eseguo dā Exception in thread "main" java.lang.NoClassDefFoundError: contabilitacodice:import java.sql.*; import java.util.*; import java.awt.*; import javax.swing.*; import java.awt.event.*; public class contabilita extends JFrame { // OGGETTI SWING JLabel lb_data; public contabilita() { super("Jorganizer"); this.setSize(640, 480); this.setLocationRelativeTo(null); this.setResizable(false); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.getContentPane().setLayout(null); lb_data = new JLabel(); lb_data.setBounds(10, 10, 150, 20); this.getContentPane().add(lb_data); this.setVisible(true); } public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true); contabilita c = new contabilita(); } }
come mai???