Example usage for java.lang Class forName

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:AutoGenKeys.java

public static void main(String args[]) {

    String url = "jdbc:mySubprotocol:myDataSource";

    Connection con = null;//from w w w .j a va 2s.  c  o m
    PreparedStatement pstmt;
    String insert = "INSERT INTO COFFEES VALUES ('HYPER_BLEND', " + "101, 10.99, 0, 0)";
    String update = "UPDATE COFFEES SET PRICE = ? WHERE KEY = ?";

    try {

        Class.forName("myDriver.ClassName");

    } catch (java.lang.ClassNotFoundException e) {
        System.err.print("ClassNotFoundException: ");
        System.err.println(e.getMessage());
    }

    try {

        con = DriverManager.getConnection(url, "myLogin", "myPassword");

        pstmt = con.prepareStatement(insert, Statement.RETURN_GENERATED_KEYS);

        pstmt.executeUpdate();
        ResultSet keys = pstmt.getGeneratedKeys();

        int count = 0;

        keys.next();
        int key = keys.getInt(1);

        pstmt = con.prepareStatement(update);
        pstmt.setFloat(1, 11.99f);
        pstmt.setInt(2, key);
        pstmt.executeUpdate();

        keys.close();
        pstmt.close();
        con.close();

    } catch (SQLException e) {
        e.printStackTrace();
    }

}

---

From source file:Join.java

public static void main(String args[]) {

    String url = "jdbc:mySubprotocol:myDataSource";
    Connection con;//www . ja v  a2s .  co m
    String query = "select SUPPLIERS.SUP_NAME, COFFEES.COF_NAME " + "from COFFEES, SUPPLIERS "
            + "where SUPPLIERS.SUP_NAME like 'Acme, Inc.' and " + "SUPPLIERS.SUP_ID = COFFEES.SUP_ID";
    Statement stmt;

    try {
        Class.forName("myDriver.ClassName");

    } catch (java.lang.ClassNotFoundException e) {
        System.err.print("ClassNotFoundException: ");
        System.err.println(e.getMessage());
    }

    try {
        con = DriverManager.getConnection(url, "myLogin", "myPassword");

        stmt = con.createStatement();

        ResultSet rs = stmt.executeQuery(query);
        System.out.println("Supplier, Coffee:");
        while (rs.next()) {
            String supName = rs.getString(1);
            String cofName = rs.getString(2);
            System.out.println("    " + supName + ", " + cofName);
        }

        stmt.close();
        con.close();

    } catch (SQLException ex) {
        System.err.print("SQLException: ");
        System.err.println(ex.getMessage());
    }
}

---

From source file:SQLStatement.java

public static void main(String args[]) {

    String url = "jdbc:mySubprotocol:myDataSource";
    Connection con;/*from   w w w .j  a  v  a 2s .  c om*/
    String query = "select SUPPLIERS.SUP_NAME, COFFEES.COF_NAME " + "from COFFEES, SUPPLIERS "
            + "where SUPPLIERS.SUP_NAME like 'Acme, Inc.' and " + "SUPPLIERS.SUP_ID = COFFEES.SUP_ID";
    Statement stmt;

    try {
        Class.forName("myDriver.ClassName");

    } catch (java.lang.ClassNotFoundException e) {
        System.err.print("ClassNotFoundException: ");
        System.err.println(e.getMessage());
    }

    try {
        con = DriverManager.getConnection(url, "myLogin", "myPassword");

        stmt = con.createStatement();

        ResultSet rs = stmt.executeQuery(query);
        ResultSetMetaData rsmd = rs.getMetaData();
        int numberOfColumns = rsmd.getColumnCount();
        int rowCount = 1;
        while (rs.next()) {
            System.out.println("Row " + rowCount + ":  ");
            for (int i = 1; i <= numberOfColumns; i++) {
                System.out.print("   Column " + i + ":  ");
                System.out.println(rs.getString(i));
            }
            System.out.println("");
            rowCount++;
        }
        stmt.close();
        con.close();

    } catch (SQLException ex) {
        System.err.print("SQLException: ");
        System.err.println(ex.getMessage());
    }
}

---

From source file:TransactionPairs.java

public static void main(String args[]) {

    String url = "jdbc:mySubprotocol:myDataSource";
    Connection con = null;// w ww  .  j  ava 2  s.  co  m
    Statement stmt;
    PreparedStatement updateSales;
    PreparedStatement updateTotal;
    String updateString = "update COFFEES " + "set SALES = ? where COF_NAME like ?";

    String updateStatement = "update COFFEES " + "set TOTAL = TOTAL + ? where COF_NAME like ?";
    String query = "select COF_NAME, SALES, TOTAL from COFFEES";

    try {
        Class.forName("myDriver.ClassName");

    } catch (java.lang.ClassNotFoundException e) {
        System.err.print("ClassNotFoundException: ");
        System.err.println(e.getMessage());
    }

    try {

        con = DriverManager.getConnection(url, "myLogin", "myPassword");

        updateSales = con.prepareStatement(updateString);
        updateTotal = con.prepareStatement(updateStatement);
        int[] salesForWeek = { 175, 150, 60, 155, 90 };
        String[] coffees = { "Colombian", "French_Roast", "Espresso", "Colombian_Decaf", "French_Roast_Decaf" };
        int len = coffees.length;
        con.setAutoCommit(false);
        for (int i = 0; i < len; i++) {
            updateSales.setInt(1, salesForWeek[i]);
            updateSales.setString(2, coffees[i]);
            updateSales.executeUpdate();

            updateTotal.setInt(1, salesForWeek[i]);
            updateTotal.setString(2, coffees[i]);
            updateTotal.executeUpdate();
            con.commit();
        }

        con.setAutoCommit(true);

        updateSales.close();
        updateTotal.close();

        stmt = con.createStatement();
        ResultSet rs = stmt.executeQuery(query);

        while (rs.next()) {
            String c = rs.getString("COF_NAME");
            int s = rs.getInt("SALES");
            int t = rs.getInt("TOTAL");
            System.out.println(c + "     " + s + "    " + t);
        }

        stmt.close();
        con.close();

    } catch (SQLException ex) {
        System.err.println("SQLException: " + ex.getMessage());
        if (con != null) {
            try {
                System.err.print("Transaction is being ");
                System.err.println("rolled back");
                con.rollback();
            } catch (SQLException excep) {
                System.err.print("SQLException: ");
                System.err.println(excep.getMessage());
            }
        }
    }
}

---

From source file:CreateSuppliers.java

public static void main(String args[]) {
    String url = "jdbc:mySubprotocol:myDataSource";
    Connection con;/*from  w w  w. j  a  va  2s.  c  o  m*/
    String createString;
    createString = "create table SUPPLIERS " + "(SUP_ID int, " + "SUP_NAME varchar(40), "
            + "STREET varchar(40), " + "CITY varchar(20), " + "STATE char(2), ZIP char(5))";

    Statement stmt;

    try {
        Class.forName("myDriver.ClassName");

    } catch (java.lang.ClassNotFoundException e) {
        System.err.print("ClassNotFoundException: ");
        System.err.println(e.getMessage());
    }

    try {
        con = DriverManager.getConnection(url, "myLogin", "myPassword");

        stmt = con.createStatement();
        stmt.executeUpdate(createString);

        stmt.close();
        con.close();

    } catch (SQLException ex) {
        System.err.println("SQLException: " + ex.getMessage());
    }
}

---

From source file:CreateStores.java

public static void main(String args[]) {

    String url = "jdbc:mySubprotocol:myDataSource";
    Connection con;//  w w w.  jav  a  2s .co  m
    String createTable;
    String createArray;
    createArray = "CREATE TYPE COF_ARRAY AS ARRAY(10) OF VARCHAR(40)";
    createTable = "CREATE TABLE STORES ( " + "STORE_NO INTEGER, LOCATION ADDRESS, "
            + "COF_TYPES COF_ARRAY, MGR REF MANAGER )";
    Statement stmt;

    try {
        Class.forName("myDriver.ClassName");

    } catch (java.lang.ClassNotFoundException e) {
        System.err.print("ClassNotFoundException: ");
        System.err.println(e.getMessage());
    }

    try {
        con = DriverManager.getConnection(url, "myLogin", "myPassword");

        stmt = con.createStatement();

        stmt.executeUpdate(createArray);
        stmt.executeUpdate(createTable);

        stmt.close();
        con.close();

    } catch (SQLException ex) {
        System.err.println("SQLException: " + ex.getMessage());
    }
}

---

From source file:TypeMapDemo.java

public static void main(String[] args) throws IOException, ClassNotFoundException, SQLException {

    Properties p = new Properties();
    p.load(new FileInputStream("db.properties"));
    Class c = Class.forName(p.getProperty("db.driver"));
    System.out.println("Loaded driverClass " + c.getName());

    Connection con = DriverManager.getConnection(p.getProperty("db.url"), "student", "student");
    System.out.println("Got Connection " + con);

    Statement s = con.createStatement();
    int ret;/*from  www  .jav a2 s .c om*/
    try {
        s.executeUpdate("drop table MR");
        s.executeUpdate("drop type MUSICRECORDING");
    } catch (SQLException andDoNothingWithIt) {
        // Should use "if defined" but not sure it works for UDTs...
    }
    ret = s.executeUpdate("create type MUSICRECORDING as object (" + "   id integer," + "   title varchar(20), "
            + "   artist varchar(20) " + ")");
    System.out.println("Created TYPE! Ret=" + ret);

    ret = s.executeUpdate("create table MR of MUSICRECORDING");
    System.out.println("Created TABLE! Ret=" + ret);

    int nRows = s.executeUpdate("insert into MR values(123, 'Greatest Hits', 'Ian')");
    System.out.println("inserted " + nRows + " rows");

    // Put the data class into the connection's Type Map
    // If the data class were not an inner class,
    // this would likely be done with Class.forName(...);
    Map map = con.getTypeMap();
    map.put("MUSICRECORDING", MusicRecording.class);
    con.setTypeMap(map);

    ResultSet rs = s.executeQuery("select * from MR where id = 123");
    //"select musicrecording(id,artist,title) from mr");
    rs.next();
    for (int i = 1; i <= rs.getMetaData().getColumnCount(); i++) {
        Object o = rs.getObject(i);
        System.out.print(o + "(Type " + o.getClass().getName() + ")\t");
    }
    System.out.println();
}

---

From source file:ca.uqam.mglunit.Runner.java

public static void main(String[] args) throws Exception {
    Runner runner = new Runner();
    TestResultLogger logger = new TestResultLogger();
    logger.setOutputStream(System.out);

    try {//from   ww w . j a va 2 s  . c  o m
        CommandLineParser parser = new GnuParser();
        CommandLine cli = parser.parse(cliOptions, args);
        if (cli.hasOption("help") || cli.getArgs().length == 0)
            printHelp();
        else {
            configureLogger(logger, cli);
            runner.setTestResultLogger(logger);
            runner.setSpecificationClass(Class.forName(cli.getArgs()[0]));
            runner.run();
        }
    } catch (ParseException ex) {
        printHelp();
    } finally {
        logger.print();
    }
}

---

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