Example usage for java.lang Class forName

List of usage examples for java.lang Class forName

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Introduction

In this page you can find the example usage for java.lang Class forName.

Prototype

@CallerSensitive
public static Class<?> forName(String className) throws ClassNotFoundException

Source Link

Document

Returns the Class object associated with the class or interface with the given string name.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);

    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";

    Connection connection = DriverManager.getConnection(url, username, password);
    // Create a scrollable result set
    Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
    ResultSet resultSet = stmt.executeQuery("SELECT * FROM my_table");

    // Move cursor forward
    while (resultSet.next()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }/*from w w w  .ja  v a 2  s  . co  m*/

    // Move cursor backward
    while (resultSet.previous()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }

    // Move cursor to the end, after the last row
    resultSet.afterLast();
}

From source file:MainClass.java

public static void main(String[] arguments) {
    String data = "jdbc:odbc:YourSettings";
    try {/*from ww w. ja v a2s  .c om*/
        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
        Connection conn = DriverManager.getConnection(data, "", "");
        Statement st = conn.createStatement();
        ResultSet rec = st
                .executeQuery("SELECT * FROM Coal WHERE (Country='" + arguments[0] + "') ORDER BY Year");
        while (rec.next()) {
            System.out.println(rec.getString(1) + "\t" + rec.getString(2) + "\t\t" + rec.getString(3) + "\t"
                    + rec.getString(4));
        }
        st.close();
    } catch (Exception e) {
        System.out.println("Error: " + e.toString() + e.getMessage());
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Class.forName("com.mysql.jdbc.Driver");
    Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/jdbctutorial", "root", "root");

    Statement st = con.createStatement();
    ResultSet rs = st.executeQuery("DESCRIBE myTable");
    ResultSetMetaData md = rs.getMetaData();
    int col = md.getColumnCount();
    for (int i = 1; i <= col; i++) {
        String col_name = md.getColumnName(i);
        System.out.println(col_name);
    }/*ww  w. j  av  a 2  s  .c o m*/
    DatabaseMetaData dbm = con.getMetaData();
    ResultSet rs1 = dbm.getColumns(null, "%", "myTable", "%");
    while (rs1.next()) {
        String col_name = rs1.getString("COLUMN_NAME");
        String data_type = rs1.getString("TYPE_NAME");
        int data_size = rs1.getInt("COLUMN_SIZE");
        int nullable = rs1.getInt("NULLABLE");
        System.out.println(col_name + " " + data_type + "(" + data_size + ")");
        if (nullable == 1) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);

    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";

    Connection connection = DriverManager.getConnection(url, username, password);
    // Create a scrollable result set
    Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
    ResultSet resultSet = stmt.executeQuery("SELECT * FROM my_table");

    // Move cursor forward
    while (resultSet.next()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }//from  w ww.ja  v a  2  s.  co  m

    // Move cursor backward
    while (resultSet.previous()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }

    // Move cursor up 3 rows from the current row. If this moves cursor beyond the first row, cursor is put before the first row
    resultSet.relative(-3);

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);

    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";

    Connection connection = DriverManager.getConnection(url, username, password);
    // Create a scrollable result set
    Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
    ResultSet resultSet = stmt.executeQuery("SELECT * FROM my_table");

    // Move cursor forward
    while (resultSet.next()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }/*from  w  w  w. jav  a 2  s.c  o m*/

    // Move cursor backward
    while (resultSet.previous()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }

    // Move cursor to the first row
    resultSet.first();

}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);

    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";

    Connection connection = DriverManager.getConnection(url, username, password);
    // Create a scrollable result set
    Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
    ResultSet resultSet = stmt.executeQuery("SELECT * FROM my_table");

    // Move cursor forward
    while (resultSet.next()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }//from ww  w . j a v  a 2s.c o  m

    // Move cursor backward
    while (resultSet.previous()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }

    // Move cursor to the beginning, before the first row.
    // cursor position is 0.
    resultSet.beforeFirst();
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);

    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";

    Connection connection = DriverManager.getConnection(url, username, password);
    // Create a scrollable result set
    Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
    ResultSet resultSet = stmt.executeQuery("SELECT * FROM my_table");

    // Move cursor forward
    while (resultSet.next()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }/*from   w  ww  .  ja  v  a2s . c om*/

    // Move cursor backward
    while (resultSet.previous()) {
        // Get data at cursor
        String s = resultSet.getString(1);
    }

    // Move cursor down 5 rows from the current row. If this moves cursor beyond the last row, cursor is put after the last row
    resultSet.relative(5);

}

From source file:MainClass.java

public static void main(String[] args) {
    String name = "java.util.Date";
    try {/*from   w w  w  .j  ava 2s  .c  o  m*/
        Class cl = Class.forName(name);
        Class supercl = cl.getSuperclass();
        System.out.println("class " + name);
        System.out.println("Its methods:");
        printMethods(cl);
        System.out.println();
    } catch (ClassNotFoundException e) {
        System.out.println("Class not found.");
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Class.forName("org.gjt.mm.mysql.Driver");

    Properties info = new Properties();
    Driver driver = DriverManager.getDriver("jdbc:mysql://localhost/demo2s");
    System.out.println("driver=" + driver);
    DriverPropertyInfo[] attributes = driver.getPropertyInfo("jdbc:mysql://localhost/demo2s", info);
    System.out.println("attributes=" + attributes);
    // zero length means a connection attempt can be made
    System.out.println("Resolving properties for: " + driver.getClass().getName());

    for (int i = 0; i < attributes.length; i++) {
        // get the property metadata
        String name = attributes[i].name;
        String[] choices = attributes[i].choices;
        boolean required = attributes[i].required;
        String description = attributes[i].description;
        // printout property metadata
        System.out.println(name + " (Required: " + required + ")");
        if (choices == null) {
            System.out.println(" No choices.");
        } else {//from  ww w  . j av  a2  s  .c o m
            System.out.print(" Choices are: ");
            for (int j = 0; j < choices.length; j++) {
                System.out.print(" " + choices[j]);
            }
        }
        System.out.println(" Description: " + description);
    }

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String db_file_name_prefix = "c:\\mydbdir\\mydb";

    Connection con = null;/*from  w w  w.j  a  va 2 s. c o m*/
    Class.forName("org.hsqldb.jdbcDriver");

    con = DriverManager.getConnection("jdbc:hsqldb:file:" + db_file_name_prefix, // filenames
            "sa", // username
            ""); // password

    Statement statement = con.createStatement();
    ResultSet rs = statement.executeQuery("SELECT * FROM \"User\"");
    while (rs.next()) {
        System.out.print("ID: " + rs.getString("ID"));
        System.out.print(" first name: " + rs.getString("firstname"));
        System.out.println(" last name: " + rs.getString("lastname"));
    }
    statement.close();
    con.close();
}