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... args) {
    try {/*from  w  w  w .ja va2  s.  com*/
        Class<?> c = Class.forName("Main");
        Method[] allMethods = c.getDeclaredMethods();
        for (Method m : allMethods) {
            TypeVariable[] types = m.getTypeParameters();
            for (TypeVariable t : types) {
                System.out.println(t);
            }

        }
    } catch (ClassNotFoundException x) {
        x.printStackTrace();
    }
}

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 statement that will return updatable result sets
    Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);

    // Primary key must be specified so that the result set is updatable
    ResultSet resultSet = stmt.executeQuery("SELECT col_string FROM my_table");

}

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);
    Statement stmt = connection.createStatement();
    ResultSet resultSet = stmt.executeQuery("SELECT COUNT(*) FROM my_table");

    // Get the number of rows from the result set
    resultSet.next();//from ww w .  ja v  a 2  s.c  om
    int rowcount = resultSet.getInt(1);
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Class.forName("org.sqlite.JDBC");

    Connection conn = DriverManager.getConnection("jdbc:sqlite:test.db");

    Statement stat = conn.createStatement();
    stat.executeUpdate("drop table if exists people;");
    stat.executeUpdate("create table people (name, occupation);");
    PreparedStatement prep = conn.prepareStatement("insert into people values (?, ?);");

    prep.setString(1, "G");
    prep.setString(2, "politics");
    prep.addBatch();/*from   www.j  a  va 2  s .c  om*/
    prep.setString(1, "Turing");
    prep.setString(2, "computers");
    prep.addBatch();
    prep.setString(1, "W");
    prep.setString(2, "Tester");
    prep.addBatch();

    conn.setAutoCommit(false);
    prep.executeBatch();
    conn.setAutoCommit(true);

    ResultSet rs = stat.executeQuery("select * from people;");
    while (rs.next()) {
        System.out.println("name = " + rs.getString("name"));
        System.out.println("job = " + rs.getString("occupation"));
    }
    rs.close();
    conn.close();
}

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);
    DatabaseMetaData dbmd = connection.getMetaData();

    String[] keywords = dbmd.getSQLKeywords().split(",\\s*");
    Arrays.toString(keywords);/* ww w . j  a va  2 s. co m*/
}

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 an updatable result set
    Statement stmt = connection.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
    ResultSet resultSet = stmt.executeQuery("SELECT * FROM my_table");

    // Delete the first row
    resultSet.first();// w  w  w.  j ava2  s .c o  m
    resultSet.deleteRow();
}

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);
    DatabaseMetaData dbmd = connection.getMetaData();
    // Get the list of string functions
    String[] stringFunctions = dbmd.getStringFunctions().split(",\\s*");
    Arrays.toString(stringFunctions);

}

From source file:MethodInspector.java

public static void main(String[] arguments) {
    Class inspect;/*w  w w.  j a  va  2  s  .c om*/
    try {
        if (arguments.length > 0)
            inspect = Class.forName(arguments[0]);
        else
            inspect = Class.forName("MethodInspector");
        Method[] methods = inspect.getDeclaredMethods();
        for (int i = 0; i < methods.length; i++) {
            Method methVal = methods[i];
            Class returnVal = methVal.getReturnType();
            int mods = methVal.getModifiers();
            String modVal = Modifier.toString(mods);
            Class[] paramVal = methVal.getParameterTypes();
            StringBuffer params = new StringBuffer();
            for (int j = 0; j < paramVal.length; j++) {
                if (j > 0)
                    params.append(", ");
                params.append(paramVal[j].getName());
            }
            System.out.println("Method: " + methVal.getName() + "()");
            System.out.println("Modifiers: " + modVal);
            System.out.println("Return Type: " + returnVal.getName());
            System.out.println("Parameters: " + params + "\n");
        }
    } catch (ClassNotFoundException c) {
        System.out.println(c.toString());
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Connection connection = null;
    try {/*from   w ww  .j a  v  a 2s  .  c  o  m*/
        Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

        connection = DriverManager.getConnection("jdbc:sqlserver://MYSERVER;databaseName=MYDATABASE", "USERID",
                "PASSWORD");

        connection.setAutoCommit(false);

        Statement statement = connection.createStatement();

        statement.executeUpdate("UPDATE Table1 SET Value = 1 WHERE Name = 'foo'");
        statement.executeUpdate("UPDATE Table2 SET Value = 2 WHERE Name = 'bar'");

        connection.commit();

    } catch (SQLException ex) {
        connection.rollback();
    }

}

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);
    DatabaseMetaData dbmd = connection.getMetaData();
    // Get the list of numeric functions
    String[] numericFunctions = dbmd.getNumericFunctions().split(",\\s*");
    Arrays.toString(numericFunctions);

}