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private void jMenuItemOpenFramePerformed(java.awt.event.ActionEvent evt) {                                                         
        this.jInternalFrame1.setVisible(true);
    } 

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//Numeric Data:

//Getter
public double getTotal() {
    return total;
}

//Setter
public void setTotal(double total) {
    this.total = total;

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Port Number
Description
1    TCP Port Service Multiplexer (TCPMUX)
5    Remote Job Entry (RJE)
7    ECHO
18   Message Send Protocol (MSP)
20   FTP -- Data
21   FTP -- Control
22   SSH Remote Login Protocol

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ArithmeticException	
  // Arithmetic error, such as divide-by-zero.

ArrayIndexOutOfBoundsException	
  // Array index is out-of-bounds.

ArrayStoreException	
  // Assignment to an array element of an incompatible type.

ClassCastException	

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Directory:    A folder used for storing multiple files.
Repository:   A directory where Git has been initialized to start version controlling your files.

The .git directory: It is usually hidden. It has all sorts of directories and files inside it. 
              We rarely ever need to do anything inside here 

Staging Area: A place where we can group files together before we COMMIT them to Git.
Commit:       A COMMIT is a snapshot of our repository. 
              This way if we ever need to look back at the changes we have made 
              (or if someone else does), we will see a nice timeline of all changes.

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    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button"
        android:layout_marginTop="97dp"
        android:layout_below="@+id/textView"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentRight="true"

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create user NOMBRE_CUENTA
identified by CONTRASEÑA
default tablespace NOMBRE_ESPACIO_DE_TABLA;

  SQL>create user MUSICAL
2 identified by MIMUSICA
3 default tablespace USERS;

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//Crear el documento
Document document = new Document();

//Definición de la ruta
PdfWriter.GetInstance(document,
new FileStream("D:/users/Documentos/HolaMundo.pdf",
FileMode.Create));
//Abrir el documeto
document.Open();
//Agregar paragraph con el texto Hola Mundo

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Given:

StringBuilder b1 = new StringBuilder("snorkler");
StringBuilder b2 = new StringBuilder("yoodler");

b1.append(b2.substring(2,5).toUpperCase());
//b1 = snorkler     b2 = yoodler

b1.append("odl".toUpperCase());
//b1 = snorkler     b2 = yoodler

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--SQL Server 2010, 2012

select * from INFORMATION_SCHEMA.TABLES