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:InsertPictureToMySql.java

public static void main(String[] args) throws Exception, IOException, SQLException {
    Class.forName("org.gjt.mm.mysql.Driver");
    Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/databaseName", "root", "root");
    String INSERT_PICTURE = "insert into MyPictures(id, name, photo) values (?, ?, ?)";

    FileInputStream fis = null;/*from  w ww  .  j a v a 2s .c  o  m*/
    PreparedStatement ps = null;
    try {
        conn.setAutoCommit(false);
        File file = new File("myPhoto.png");
        fis = new FileInputStream(file);
        ps = conn.prepareStatement(INSERT_PICTURE);
        ps.setString(1, "001");
        ps.setString(2, "name");
        ps.setBinaryStream(3, fis, (int) file.length());
        ps.executeUpdate();
        conn.commit();
    } finally {
        ps.close();
        fis.close();
    }
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    try {//from   www . j a  va 2 s . c om
        String url = "jdbc:odbc:yourdatabasename";
        String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
        String user = "guest";
        String password = "guest";

        Class.forName(driver);
        Connection connection = DriverManager.getConnection(url, user, password);
        Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
                ResultSet.CONCUR_READ_ONLY);

        String sqlQuery = "SELECT EMPNO, EName, Job, MGR, HIREDATE FROM EMP";
        ResultSet rs = stmt.executeQuery(sqlQuery);
        rs.last();

        // Move the cursor backwards through the ResultSet
        while (rs.previous()) {
            String nbr = rs.getString(1);
            String name = rs.getString(2);
            String job = rs.getString(3);
            String mgr = rs.getString(4);
            Timestamp hireDate = rs.getTimestamp(5);
            System.out.println(name);
        }

        rs.close();
        stmt.close();
        connection.close();
    } catch (Exception e) {
        System.err.println(e);
    }
}

---

From source file:Main.java

public static void main(String[] args) throws Exception {

    Class.forName(DRIVER);
    Connection connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);

    connection.close();/*ww  w.j  ava 2  s .  c o  m*/
}

---

From source file:TableMaker.java

public static void main(String[] args) throws Exception {
    Class.forName(jdbcDriver);
    url += dbName;/*from w w  w . j  av a  2 s. c om*/
    Connection con = null;
    Statement stmt = null;
    con = DriverManager.getConnection(url);
    stmt = con.createStatement();
    stmt.execute(SQLCreate);
    con.close();
    if (con != null) {
        con.close();
    }
    if (stmt != null) {
        stmt.close();
    }

}

---

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Class.forName(DB_DRIVER);
    Connection dbConnection = DriverManager.getConnection(DB_CONNECTION, DB_USER, DB_PASSWORD);

    CallableStatement callableStatement = null;
    String getPERSONByUserIdSql = "{call getPERSONByUserId(?,?,?,?)}";
    callableStatement = dbConnection.prepareCall(getPERSONByUserIdSql);

    callableStatement.setInt(1, 10);/* ww w  .jav a 2  s .  c  o m*/
    callableStatement.registerOutParameter(2, java.sql.Types.VARCHAR);
    callableStatement.registerOutParameter(3, java.sql.Types.VARCHAR);
    callableStatement.registerOutParameter(4, java.sql.Types.DATE);

    callableStatement.executeUpdate();

    String userName = callableStatement.getString(2);
    String createdBy = callableStatement.getString(3);
    Date createdDate = callableStatement.getDate(4);

    System.out.println("UserName : " + userName);
    System.out.println("CreatedBy : " + createdBy);
    System.out.println("CreatedDate : " + createdDate);
    callableStatement.close();
    dbConnection.close();
}

---

From source file:Main.java

public static void main(String[] args) throws Exception {
    String url = "jdbc:mysql://192.168.100.100:3306/";
    String dbName = "databaseName";
    Statement stmt = null;//from w w w. ja  va2 s.  com
    ResultSet result = null;
    String driver = "com.mysql.jdbc.Driver";
    String databaseUserName = "admin";
    String databasePassword = "root";
    Class.forName(driver).newInstance();
    Connection conn = DriverManager.getConnection(url + dbName, databaseUserName, databasePassword);
    stmt = conn.createStatement();
    result = null;
    String password, username;
    result = stmt.executeQuery("select * from userTable where username ='user1' ");
    if (!result.isBeforeFirst()) {
        System.out.println("resultset contin no rows");
    }
    while (result.next()) {
        username = result.getString("username");
        password = result.getString("password");
        System.out.println(username + "  " + password);
    }
    conn.close();
}

---

From source file:GetSerVersUID.java

public static void main(String[] av) throws Exception {

    // First we construct a Class object for the given class
    Class cl = Class.forName("Candidate");

    // Then an ObjectStreamClass for the given class
    ObjectStreamClass ocl = ObjectStreamClass.lookup(cl);

    // And use the ObjectStreamClass to get the Class'
    // unique SerialVersionUID
    System.out.println("For class " + cl);
    System.out.println("static final long serialVersionUID = " + ocl.getSerialVersionUID() + "L;"); // must be long

    // And just for reference...
    System.out.println("(Must range from " + Long.MIN_VALUE + " to " + Long.MAX_VALUE + ".)");
}

---

From source file:Main.java

public static void main(String[] args) throws Exception {
    Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

    Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL", "yourName", "mypwd");

    Statement stmt = conn.createStatement();

    createBlobClobTables(stmt);/*www. ja  v  a 2s . c om*/

    PreparedStatement pstmt = conn.prepareStatement("INSERT INTO BlobClob VALUES(40,?,?)");

    File file = new File("blob.txt");
    FileInputStream fis = new FileInputStream(file);
    pstmt.setBinaryStream(1, fis, (int) file.length());

    file = new File("clob.txt");
    fis = new FileInputStream(file);
    pstmt.setAsciiStream(2, fis, (int) file.length());
    fis.close();

    pstmt.execute();

    ResultSet rs = stmt.executeQuery("SELECT * FROM BlobClob WHERE id = 40");
    rs.next();

    java.sql.Blob blob = rs.getBlob(2);
    java.sql.Clob clob = rs.getClob(3);

    byte blobVal[] = new byte[(int) blob.length()];
    InputStream blobIs = blob.getBinaryStream();
    blobIs.read(blobVal);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    bos.write(blobVal);
    blobIs.close();

    char clobVal[] = new char[(int) clob.length()];
    Reader r = clob.getCharacterStream();
    r.read(clobVal);
    StringWriter sw = new StringWriter();
    sw.write(clobVal);

    r.close();
    conn.close();
}

---

From source file:Main.java

public static void main(String[] args) throws Exception {
    Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

    Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL", "yourName", "mypwd");

    Statement stmt = conn.createStatement();

    createBlobClobTables(stmt);/*www . j a  v  a2  s .c o m*/

    PreparedStatement pstmt = conn.prepareStatement("INSERT INTO BlobClob VALUES(40,?,?)");

    File file = new File("blob.txt");
    FileInputStream fis = new FileInputStream(file);
    pstmt.setBinaryStream(1, fis, (int) file.length());

    file = new File("clob.txt");
    fis = new FileInputStream(file);
    pstmt.setAsciiStream(2, fis, (int) file.length());
    fis.close();

    pstmt.execute();

    ResultSet rs = stmt.executeQuery("SELECT * FROM BlobClob WHERE id = 40");
    rs.next();

    java.sql.Blob blob = rs.getBlob(2);
    java.sql.Clob clob = rs.getClob("myClobColumn");

    byte blobVal[] = new byte[(int) blob.length()];
    InputStream blobIs = blob.getBinaryStream();
    blobIs.read(blobVal);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    bos.write(blobVal);
    blobIs.close();

    char clobVal[] = new char[(int) clob.length()];
    Reader r = clob.getCharacterStream();
    r.read(clobVal);
    StringWriter sw = new StringWriter();
    sw.write(clobVal);

    r.close();
    conn.close();
}

---

From source file:Main.java

public static void main(String[] args) throws Exception {
    String url = "jdbc:odbc:databaseName";
    String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
    String user = "guest";
    String password = "guest";

    String theStatement = "SELECT lastname, firstname FROM autors";

    try {//from  w  w  w. j  a  v a  2  s.  co m
        Class.forName(driver);
        Connection connection = DriverManager.getConnection(url, user, password);
        Statement queryAuthors = connection.createStatement();
        ResultSet theResults = queryAuthors.executeQuery(theStatement);

        queryAuthors.close();
    } catch (ClassNotFoundException cnfe) {
        System.err.println(cnfe);
    } catch (SQLException sqle) {
        String sqlMessage = sqle.getMessage();
        String sqlState = sqle.getSQLState();
        int vendorCode = sqle.getErrorCode();
        System.err.println("Exception occurred:");
        System.err.println("Message: " + sqlMessage);
        System.err.println("SQL state: " + sqlState);
        System.err.println("Vendor code: " + vendorCode + "\n----------------");
    }
}

---

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