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:Main.java

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

    PreparedStatement ps = connection.prepareStatement("UPDATE books SET title = ? WHERE id = ?");
    ps.setString(1, "Java");
    ps.setInt(2, 1);/*from  w w  w  .  j a va2 s  .c o m*/
    int rows = ps.executeUpdate();

    System.out.printf("%d row(s) updated!", rows);
    connection.close();
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection conn = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};"
            + "DBQ=C:\\Users\\Public\\uls\\ulsTest.mdb;" + "SystemDB=C:\\Users\\Public\\uls\\Security.mdw;"
            + "Uid=Gord;" + "Pwd=obfuscated;" + "ExtendedAnsiSQL=1;");

    String UID = "Tim";
    String oldPWD = "oldpassword";
    String newPWD = "I like Java";

    Statement s = conn.createStatement();
    s.execute("ALTER USER " + UID + " PASSWORD \"" + newPWD + "\" \"" + oldPWD + "\"");

    s.close();// w  ww  .j  a  v  a 2  s  .  c  om
    conn.close();
}

From source file:Main.java

License:asdf

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");

    String sql = "INSERT product VALUES(?,?)";
    PreparedStatement prest = con.prepareStatement(sql);
    prest.setString(1, "asdf");
    prest.setInt(2, 2009);/*from   ww w . ja v  a 2s  . c  o  m*/
    int count = prest.executeUpdate();
    System.out.println(count + "row(s) affected");
    con.close();
}

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");

    String sql = "DELETE FROM product where year_made = ?";
    PreparedStatement prest = con.prepareStatement(sql);
    prest.setInt(1, 2008);// w ww . j  a va2 s  . com
    int del = prest.executeUpdate();
    System.out.println("Number of deleted records: " + del);
    con.close();
}

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");

    con.setAutoCommit(false);//from  w  w w .j ava2s  . co m
    String table1 = "INSERT emp_sal VALUES('v',1200)";
    String table2 = "DELETE FROM movies WHERE title = 'r'";
    Statement st = con.createStatement();
    st.addBatch(table1);
    st.addBatch(table2);
    int count[] = st.executeBatch();
    con.commit();
    con.close();
    System.out.println("Successfully!");
}

From source file:MyClass.java

public static void main(String[] args) throws Exception {
    Class<?> clazz = Class.forName("MyClass");
    MyClass x = (MyClass) clazz.newInstance();

    Field f = clazz.getField("i");
    System.out.println(f.getBoolean(x));

    f.setBoolean(x, false);//from w w  w.  j ava  2 s.co m
    System.out.println(f.getBoolean(x));

}

From source file:MyClass.java

public static void main(String[] args) throws Exception {
    Class<?> clazz = Class.forName("MyClass");
    MyClass x = (MyClass) clazz.newInstance();

    Field f = clazz.getField("i");
    System.out.println(f.getFloat(x));

    f.setFloat(x, 9.99F);/*from   w w  w  . j  a  v a 2  s . c  o  m*/
    System.out.println(f.getFloat(x));

}

From source file:MyClass.java

public static void main(String[] args) throws Exception {
    Class<?> clazz = Class.forName("MyClass");
    MyClass x = (MyClass) clazz.newInstance();

    Field f = clazz.getField("i");
    System.out.println(f.getDouble(x));

    f.setDouble(x, 9.99);/*w  w w . j  a va2  s.  c  o  m*/
    System.out.println(f.getDouble(x));

}

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");

    String sql = "INSERT myTable VALUES(?,?,?,?)";
    PreparedStatement prest = con.prepareStatement(sql);
    prest.setString(1, "A");
    prest.setInt(2, 5);/*w w w . j ava  2  s .  c  o  m*/
    prest.setDouble(3, 2.0);
    prest.setFloat(4, 4.2f);
    int row = prest.executeUpdate();
    System.out.println(row + " row(s) affected)");
}

From source file:MyClass.java

public static void main(String[] args) throws Exception {
    Class<?> clazz = Class.forName("MyClass");
    MyClass x = (MyClass) clazz.newInstance();

    Field f = clazz.getField("i");
    System.out.println(f.getLong(x));

    f.setLong(x, 9L);// w w  w . j a  v  a 2  s  . co m
    System.out.println(f.getLong(x));

}