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- java.lang.SecurityException: Prohibited package name: java
- at java.lang.ClassLoader.preDefineClass(ClassLoader.java:480)
- at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
- at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
- at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
- at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
- at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
- at java.security.AccessController.doPrivileged(Native Method)
- at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
- at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
- at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
- at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
- at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
- Could not find the main class: java.Main. Program will exit.
- Exception in thread "main" Java Result: 1
- BUILD SUCCESSFUL (total time: 0 seconds)
- package java;
- import java.awt.Container;
- import java.sql.DriverManager;
- import java.sql.Connection;
- import java.sql.ResultSet;
- import java.sql.ResultSetMetaData;
- import java.sql.SQLException;
- import java.sql.Statement;
- import java.util.logging.Level;
- import java.util.logging.Logger;
- import javax.swing.JFrame;
- import javax.swing.JScrollPane;
- import javax.swing.JTextArea;
- /**
- *
- * @author ritesh
- */
- public class Main extends JFrame{
- public Main() throws SQLException
- {super("Database of Students");
- try {
- Class.forName("org.apache.derby.jdbc.ClientDriver");
- } catch (ClassNotFoundException ex) {
- Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
- }
- Connection connection = DriverManager.getConnection( "jdbc:derby:/localhost:1527","hello","Hello" );
- Statement statement = connection.createStatement();
- // query database
- ResultSet resultSet =
- statement.executeQuery( "SELECT * FROM COLLEAGUES" );
- StringBuffer results = new StringBuffer();
- ResultSetMetaData metaData = resultSet.getMetaData();
- int numberOfColumns = metaData.getColumnCount();
- for ( int i = 1; i <= numberOfColumns; i++ ) {
- results.append( metaData.getColumnName( i ) + "t" );
- }
- results.append( "n" );
- while ( resultSet.next() ) {
- for ( int i = 1; i <= numberOfColumns; i++ ) {
- results.append( resultSet.getObject( i ) + "t" );
- }
- }
- // close statement and connection
- statement.close();
- connection.close();
- // set up GUI and display window
- JTextArea textArea = new JTextArea( "Hello");
- Container container = getContentPane();
- container.add( new JScrollPane( textArea ) );
- setSize( 300, 100 ); // set window size
- setVisible( true ); // display window
- }
- /**
- * @param args the command line arguments
- */
- public static void main(String[] args) {
- try {
- Main window = new Main();
- window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
- // TODO code application logic here
- } catch (SQLException ex) {
- Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
- }
- }
- }
- java.lang.SecurityException: Prohibited package name: java
- Connection connection = DriverManager.getConnection( "jdbc:derby://localhost:1527/DatabaseName","hello","Hello" );
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