丹丹的筆記本: 2月 2013

2013年2月27日星期三

VitualBox調整磁碟空間

VBoxManage是VitualBox的指令工具利用modifyhd指令跟resize參數就可以調整虛擬磁區的大小

路徑可以有空白不過需要用雙引號括起來 resize參數的單位是MB


  VBoxManage modifyhd "/path/to/dvi/file" --resize 50000

2013年2月24日星期日

Repositories

Spring Sample SVN:
https://src.springframework.org/svn/spring-samples/

2013年2月23日星期六

Oracle 清除所有Objects


begin
  -- Drop Tables
  FOR REC IN (
      SELECT table_name 
      FROM user_tables 
      WHERE NOT EXISTS(SELECT 1 FROM USER_VIEWS WHERE VIEW_NAME = TABLE_NAME)
        and NOT EXISTS(SELECT 1 FROM USER_MVIEWS WHERE MVIEW_NAME = TABLE_NAME)
    )
  LOOP
    BEGIN 
      EXECUTE IMMEDIATE 'DROP TABLE ' || REC.table_name;
    EXCEPTION
      WHEN OTHERS THEN
        IF SQLCODE != -942 THEN
           RAISE;
        END IF;
  END;
  END LOOP;
  
  -- VIEW
  FOR REC IN (
      SELECT VIEW_NAME 
      FROM user_views
    )
  LOOP
    BEGIN 
      EXECUTE IMMEDIATE 'DROP VIEW ' || REC.VIEW_NAME;
    EXCEPTION
      WHEN OTHERS THEN
        IF SQLCODE != -942 THEN
           RAISE;
        END IF;
  END;
  END LOOP;
  
  -- MVIEW
  FOR REC IN (
      SELECT mview_name FROM USER_MVIEWS
    )
  LOOP
    BEGIN 
      EXECUTE IMMEDIATE 'DROP MATERIALIZED VIEW ' || REC.mview_name;
    EXCEPTION
      WHEN OTHERS THEN
        IF SQLCODE != -942 THEN
           RAISE;
        END IF;
  END;
  END LOOP;
  
  -- FUNCTION
  FOR REC IN (
      SELECT object_name FROM user_objects WHERE object_type = 'FUNCTION'
    )
  LOOP
    BEGIN 
      EXECUTE IMMEDIATE 'DROP FUNCTION ' || REC.object_name;
    EXCEPTION
      WHEN OTHERS THEN
        IF SQLCODE != -942 THEN
           RAISE;
        END IF;
  END;
  END LOOP;
  
  -- PROCEDURE
  FOR REC IN (
      SELECT object_name FROM user_objects WHERE object_type = 'PROCEDURE'
    )
  LOOP
    BEGIN 
      EXECUTE IMMEDIATE 'DROP PROCEDURE ' || REC.object_name;
    EXCEPTION
      WHEN OTHERS THEN
        IF SQLCODE != -942 THEN
           RAISE;
        END IF;
  END;
  END LOOP;
  
  -- DATABASE LINK
  FOR REC IN (
      SELECT object_name FROM user_objects WHERE object_type = 'DATABASE LINK'
    )
  LOOP
    BEGIN 
      EXECUTE IMMEDIATE 'DROP DATABASE LINK ' || REC.object_name;
    EXCEPTION
      WHEN OTHERS THEN
        IF SQLCODE != -942 THEN
           RAISE;
        END IF;
  END;
  END LOOP;
  
  -- TYPE
  FOR REC IN (
      SELECT object_name FROM user_objects WHERE object_type = 'TYPE'
    )
  LOOP
    BEGIN 
      EXECUTE IMMEDIATE 'DROP TYPE ' || REC.object_name || ' FORCE';
    EXCEPTION
      WHEN OTHERS THEN
        IF SQLCODE != -942 THEN
           RAISE;
        END IF;
  END;
  END LOOP;
  
  -- JOB
  FOR REC IN (
      SELECT object_name FROM user_objects WHERE object_type = 'JOB'
    )
  LOOP
    dbms_scheduler.drop_job(REC.OBJECT_NAME);
  END LOOP;

-- Drop SYNONYM
  FOR REC IN (
      select OBJECT_NAME from user_objects where object_type = 'SYNONYM'
    )
  LOOP
    BEGIN 
      EXECUTE IMMEDIATE 'DROP SYNONYM ' || REC.OBJECT_NAME;

    EXCEPTION
      WHEN OTHERS THEN
        IF SQLCODE != -942 THEN
           RAISE;
        END IF;
  END;
  END LOOP;
end;

2013年2月14日星期四

BoxLayout

BoxLayout1, 水平與垂直Box, X_AXIS, Y_AXIS
BoxLayout2, 自動推開元件: Glue, HorizontalGlue, VerticalGlue
BoxLayout3, 固定大小的分隔: HorizontalStrut, VerticalStrut
BoxLayout4, 有長跟寬的分隔: RigidArea
BoxLayout5, 有最小最大跟預設大小的RigidArea: Box.Filler
BoxLayout6, Box中在裝Box: HorizontalBox, VerticalBox

X_AXIS：从左到右水平布置组件。
Y_AXIS：从上到下垂直布置组件。
LINE_AXIS：根据容器的 ComponentOrientation 属性，按照文字在一行中的排列方式布置组件。如果容器的 ComponentOrientation 表示水平，则将组件水平放置，否则将它们垂直放置。对于水平方向，如果容器的 ComponentOrientation 表示从左到右，则组件从左到右放置，否则将它们从右到左放置。对于垂直方向，组件总是从上到下放置的。
PAGE_AXIS：根据容器的 ComponentOrientation 属性，按照文本行在一页中的排列方式布置组件。如果容器的 ComponentOrientation 表示水平，则将组件垂直放置，否则将它们水平放置。对于水平方向，如果容器的 ComponentOrientation 表示从左到右，则组件从左到右放置，否则将它们从右到左放置。对于垂直方向，组件总是从上向下放置的。

BoxLayout1, 水平與垂直Box, X_AXIS, Y_AXIS

import java.awt.Container;
import java.awt.GridLayout;

import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class TestBoxLayout1 {
public static void main(String[] args) {
JFrame frame = new JFrame("BoxLayout-1");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container cp = frame.getContentPane();
cp.setLayout(new GridLayout(0, 1));

JPanel panel = null;
panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
panel.add(new JButton("1"));
panel.add(new JButton("2"));
panel.add(new JButton("3"));
cp.add(panel);

panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
panel.add(new JButton("4"));
panel.add(new JButton("5"));
panel.add(new JButton("6"));
cp.add(panel);

frame.setVisible(true);
frame.pack();
}
}

BoxLayout2, 自動推開元件: Glue, HorizontalGlue, VerticalGlue

import java.awt.Color;

import java.awt.Container;

import java.awt.GridLayout;

import javax.swing.Box;

import javax.swing.BoxLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class TestBoxLayout2 {

public static void main(String[] args) {

JFrame frame = new JFrame("BoxLayout-2");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container cp = frame.getContentPane();

cp.setLayout(new GridLayout(0, 1));

JPanel panel = null;

// glue在垂列與水平的boxLayout中有作用

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));

panel.add(new JButton("1"));

panel.add(Box.createGlue());

panel.add(new JButton("2"));

panel.add(new JButton("3"));

cp.add(panel);

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));

panel.add(new JButton("1"));

panel.add(Box.createGlue());

panel.add(new JButton("2"));

panel.add(new JButton("3"));

cp.add(panel);

// 水平的glue只在水平的BoxLayout中有作用

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));

panel.add(new JButton("1"));

panel.add(Box.createHorizontalGlue());

panel.add(new JButton("2"));

panel.add(new JButton("3"));

cp.add(panel);

// 水平的glue在垂列的box中沒有作用

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));

panel.add(new JButton("1"));

panel.add(Box.createHorizontalGlue());

panel.add(new JButton("2"));

panel.add(new JButton("3"));

cp.add(panel);

frame.setVisible(true);

frame.pack();

}

BoxLayout3, 固定大小的分隔: HorizontalStrut, VerticalStrut

import java.awt.Color;

import java.awt.Component;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.GridLayout;

import javax.swing.Box;

import javax.swing.BoxLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class TestBoxLayout3 {

public static void main(String[] args) {

JFrame frame = new JFrame("BoxLayout-3");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container cp = frame.getContentPane();

cp.setLayout(new GridLayout(0, 1));

JPanel panel = null;

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));

panel.add(new JButton("1"));

panel.add(Box.createHorizontalGlue());

panel.add(new JButton("2"));

panel.add(new JButton("3"));

cp.add(panel);

// Strut可以固定分隔的大小

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));

panel.add(new JButton("1"));

panel.add(Box.createHorizontalStrut(50));

panel.add(new JButton("2"));

panel.add(new JButton("3"));

cp.add(panel);

frame.setVisible(true);

frame.pack();

}

BoxLayout4, 有長跟寬的分隔: RigidArea

import java.awt.Color;

import java.awt.Component;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.GridLayout;

import javax.swing.Box;

import javax.swing.BoxLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class TestBoxLayout4 {

public static void main(String[] args) {

JFrame frame = new JFrame("BoxLayout-4");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container cp = frame.getContentPane();

cp.setLayout(new GridLayout(0, 1));

JPanel panel = null;

// RigidArea就像是有寬跟高的strut

// 設置比較大的值會讓排版的大小也變得更大

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));

panel.add(new JButton("1"));

panel.add(Box.createRigidArea(new Dimension(100, 50)));

panel.add(new JButton("2"));

panel.add(new JButton("3"));

cp.add(panel);

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));

panel.add(new JButton("1"));

panel.add(Box.createRigidArea(new Dimension(100, 50)));

panel.add(new JButton("2"));

panel.add(new JButton("3"));

cp.add(panel);

frame.setVisible(true);

frame.pack();

}

BoxLayout5, 有最小最大跟預設大小的RigidArea: Box.Filler

import java.awt.Color;

import java.awt.Component;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.GridLayout;

import javax.swing.Box;

import javax.swing.Box.Filler;

import javax.swing.BoxLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class TestBoxLayout5 {

public static void main(String[] args) {

JFrame frame = new JFrame("BoxLayout-5");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container cp = frame.getContentPane();

cp.setLayout(new GridLayout(0, 1));

JPanel panel = null;

//Filler 就像是可變動大小的Strut

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));

panel.add(new JButton("1"));

Dimension min = new Dimension(50, 50);

Dimension max = new Dimension(150,150);

Dimension preferred = new Dimension(100, 100);

Filler filler = new Box.Filler(min, preferred, max);

panel.add(filler);

panel.add(new JButton("2"));

panel.add(new JButton("3"));

cp.add(panel);

frame.setVisible(true);

frame.pack();

}

BoxLayout6, Box中在裝Box: HorizontalBox, VerticalBox

import java.awt.Color;

import java.awt.Component;

import java.awt.Container;

import java.awt.Dimension;

import java.awt.GridLayout;

import javax.swing.Box;

import javax.swing.BoxLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class TestBoxLayout6 {

public static void main(String[] args) {

JFrame frame = new JFrame("BoxLayout-6");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container cp = frame.getContentPane();

cp.setLayout(new GridLayout(0, 1));

JPanel panel = null;

// Box的功能其實可以直接其他layout搭配Box來用！！！

panel = new JPanel();

panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));

panel.add(new JButton("1"));

Box box = Box.createVerticalBox();

box.add(new JButton("4"));

box.add(new JButton("5"));

box.add(new JButton("6"));

panel.add(box);

panel.add(new JButton("2"));

box = Box.createVerticalBox();

box.add(new JButton("7"));

box.add(new JButton("8"));

box.add(new JButton("9"));

panel.add(box);

panel.add(new JButton("3"));

cp.add(panel);

frame.setVisible(true);

frame.pack();

}

Layout - BorderLayout, FlowLayout, GridLayout

BorderLayout

BorderLayout - Example

除了常見的東西南北中發白之外再加上Hgap與VGap兩個屬性

import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JButton;
import javax.swing.JFrame;

public class TestBorderLayout {
public static void main(String[] args) {
JFrame frame = new JFrame("BorderLayout");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container cp = frame.getContentPane();

BorderLayout layout = new BorderLayout();
layout.setHgap(100);
layout.setVgap(30);
cp.setLayout(layout);

JButton north = new JButton("North");
JButton south = new JButton("South");
JButton east = new JButton("East");
JButton west = new JButton("West");
JButton center = new JButton("Center");

cp.add(north, BorderLayout.NORTH);
cp.add(south, BorderLayout.SOUTH);
cp.add(east, BorderLayout.EAST);
cp.add(west, BorderLayout.WEST);
cp.add(center, BorderLayout.CENTER);

frame.setVisible(true);
frame.pack();
}

}

FlowLayout - Example

預設值除了Hgap與VGrap外多了一個Alignment

import java.awt.Color;

import java.awt.Container;

import java.awt.FlowLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

public class TestFlowLayout {

public static void main(String[] args) {

JFrame frame = new JFrame("FlowLayout");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container cp = frame.getContentPane();

FlowLayout layout = new FlowLayout(FlowLayout.CENTER, 10, 10);

// DEFAULT is (CENTER, 5, 5)

cp.setLayout(layout);

JButton btn[] = new JButton[10];

for(int i = 0 ; i < btn.length; i++){

btn[i] = createBtn(i);

cp.add(btn[i]);

}

frame.setVisible(true);

frame.pack();

}

private static JButton createBtn(int i) {

JButton btn = new JButton();

Color bg = new Color(i*256/10,i*256/10,i*256/10);

btn.setText(""+(i*256/10));

btn.setForeground(bg);

return btn;

}

靠左,中,右對齊

GridLayout

不得不說的事情是當我們放元件進去的時候是無法指定他放在grid的什麼位置的

因為這個layout的排版方式就是將parent裡面的所有元件拿來依照指定的gird size來排位置

import java.awt.Container;

import java.awt.GridLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

public class TestGridLayout {

public static void main(String[] args) {

JFrame frame = new JFrame("FlowLayout");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Container cp = frame.getContentPane();

// DEFAULT is (1, 0, 0, 0);

GridLayout layout = new GridLayout(5, 5, 10, 10);

cp.setLayout(layout);

for(int i = 0 ; i < 25 ; i++){

if(i%2 == 0){

cp.add(new JButton(""+i));

}else{

cp.add(new JLabel());

}

frame.setVisible(true);

frame.pack();

}

訂閱：文章 (Atom)

2013年2月27日 星期三

VitualBox調整磁碟空間

2013年2月24日 星期日

Repositories

2013年2月23日 星期六

Oracle 清除所有Objects

2013年2月14日 星期四

Layout - BoxLayout

BoxLayout1, 水平與垂直Box, X_AXIS, Y_AXIS

BoxLayout2, 自動推開元件: Glue, HorizontalGlue, VerticalGlue

BoxLayout3, 固定大小的分隔: HorizontalStrut, VerticalStrut

BoxLayout4, 有長跟寬的分隔: RigidArea

BoxLayout5, 有最小最大跟預設大小的RigidArea: Box.Filler

BoxLayout6, Box中在裝Box: HorizontalBox, VerticalBox

Layout - BorderLayout, FlowLayout, GridLayout

2013年2月27日星期三

2013年2月24日星期日

2013年2月23日星期六

2013年2月14日星期四