import java.awt.*;
class GetPointerLoc
{
public static void main(String args[])
{
// Get global current cursor location
Point p=MouseInfo.getPointerInfo().getLocation();
System.out.println(p);
}
}
Image credit: Iconarchive
Yes, you are able to move mouse pointer with arrow keys in Java globally and that is theme of the below program. With the help of this program, the cursor pointer goes up when UP arrow key is pressed, down when down arrow key is pressed.... and press the mouse when enter is pressed. Isn't that cool? Let us take a look at the example below.MouseInfo.getPointerInfo().getLocation(): This method is present in the PointerInfo class whose object can be obtained by getPointerInfo() method in the MouseInfo class. getLocation() returns the current mouse pointer location which is helpful in moving the cursor with arrow keys.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class MoveCursor extends JFrame
{
Robot r;
public MoveCursor()
{
createAndShowGUI();
}
private void createAndShowGUI()
{
setTitle("Move Cursor with Keyboard");
setDefaultCloseOperation(EXIT_ON_CLOSE);
// hide the visibility
setUndecorated(true);
setOpacity(0f);
setVisible(true);
// Create Robot object
try
{
r=new Robot();
}catch(Exception e){}
addKeyListener(new KeyAdapter(){
public void keyPressed(KeyEvent e)
{
// If there occured an exception
// while creating Robot object, r is null
// then go back
if(r==null) return;
// Get global current cursor location
Point p=MouseInfo.getPointerInfo().getLocation();
switch(e.getKeyCode())
{
case KeyEvent.VK_UP: r.mouseMove(p.x,p.y-1); break;
case KeyEvent.VK_DOWN: r.mouseMove(p.x,p.y+1); break;
case KeyEvent.VK_LEFT: r.mouseMove(p.x-1,p.y); break;
case KeyEvent.VK_RIGHT: r.mouseMove(p.x+1,p.y); break;
// left click
case KeyEvent.VK_ENTER: r.mousePress(MouseEvent.BUTTON1_MASK); r.mouseRelease(MouseEvent.BUTTON1_MASK);
}
}
});
}
public static void main(String args[])
{
new MoveCursor();
}
}
Component
|
+-- Container
|
+-- Panel
| |
| +-- Applet
|
+-- Window
|
+-- Frame
import java.awt.*;
import java.awt.geom.*;
class AWTDialog extends Frame
{
Dialog d1,d2;
public AWTDialog()
{
createAndShowGUI();
}
private void createAndShowGUI()
{
setTitle("AWT Dialog in Java Example");
// A dialog with current frame as parent
d1=new Dialog(this);
// Set the title
d1.setTitle("Dialog 1");
d1.setSize(400,400);
// Hide title bar and borders
d1.setUndecorated(true);
// Set background for dialog
d1.setBackground(Color.GRAY);
// Set opacity
d1.setOpacity(0.4f);
// Set d1 location relative to desktop
// d1 appears at center of screen
d1.setLocationRelativeTo(null);
// Set some shape to d1
RoundRectangle2D.Double r=new RoundRectangle2D.Double(0,0,400,400,20,20);
// Set the rounded rectangle shape
d1.setShape(r);
d1.setVisible(true);
// Create a dialog with current frame as parent
// with title Simple Dialog
d2=new Dialog(d1,"Simple Dialog");
// d1 cannot be made active if d2 isn't closed
// this is theme behind setting a dialog modal
// default value is false
d2.setModal(true);
// Set size
d2.setSize(150,150);
// Set layout
d2.setLayout(new FlowLayout());
// Make it non resizable
d2.setResizable(false);
// Set d2 location relative to d1
// d2 appears at center of d1
d2.setLocationRelativeTo(d1);
// Add some components
d2.add(new Button("Button"));
d2.add(new Checkbox("Checkbox"));
d2.add(new TextField(20));
// Show the dialog
d2.setVisible(true);
setSize(400,400);
setVisible(true);
}
public static void main(String args[])
{
new AWTDialog();
}
}
import java.awt.*;
import java.awt.event.*;
class AWTCheckboxMenuItem extends Frame
{
MenuBar b;
Menu m;
CheckboxMenuItem m1,m2,m3;
public AWTCheckboxMenuItem()
{
createAndShowGUI();
}
private void createAndShowGUI()
{
setTitle("CheckboxMenuItem in AWT Example");
setLayout(new FlowLayout());
// Create menu bar and menu
b=new MenuBar();
m=new Menu("Menu");
// Empty checkboxmenuitem
m1=new CheckboxMenuItem();
// Labeled
m2=new CheckboxMenuItem("Item 2");
// Selected and labeled
m3=new CheckboxMenuItem("Item 3",true);
// Set label and state
m1.setLabel("Item 1");
m1.setState(true);
// Add CheckboxMenuItems to menu
m.add(m1);
m.add(m2);
m.add(m3);
// Add menu to menubar
b.add(m);
// Add menu to the menubar
setMenuBar(b);
setSize(400,400);
setVisible(true);
}
public static void main(String args[])
{
new AWTCheckboxMenuItem();
}
}
import java.awt.*;
import java.awt.event.*;
class AWTList extends Frame
{
List l1,l2,l3,l4;
public AWTList()
{
createAndShowGUI();
}
private void createAndShowGUI()
{
setTitle("List in AWT Example");
setLayout(new FlowLayout());
// An empty list
l1=new List();
// List with given no.of rows
l2=new List(5);
// List with given no.of rows,multi-select enabled
l3=new List(5,true);
// One more empty list!
l4=new List();
// Add items
l1.add("Item 1");
l1.add("Item 2");
l1.add("Item 3");
l1.add("Item 4");
l1.add("Item 5");
l2.add("Item 1");
l2.add("Item 2");
l2.add("Item 3");
l2.add("Item 4");
l2.add("Item 5");
l3.add("Item 1");
l3.add("Item 2");
l3.add("Item 3");
l3.add("Item 4");
l3.add("Item 5");
l4.add("Item 1");
l4.add("Item 2");
l4.add("Item 3");
l4.add("Item 4");
l4.add("Item 5");
// Enable multi select for l1
l1.setMultipleMode(true);
// Add item at index 2
// Item 3 goes to 4th 'position'
l1.add("Item 2-A",2);
// Make Item 1 visible no matter what
// which item is selected
l1.makeVisible(0);
// Replace an item
// Item 2 becomes 2nd Item
l3.replaceItem("2nd Item",1);
// Select item at 2nd index
l1.select(2);
/* -- Select and de-select -- */
// Select item at 0 index
l2.select(0);
// De-Select an item by index
l2.deselect(0);
// Remove item at 2nd index
l2.remove(2);
// Remove Item 1
// Item 2 now comes at 0th index
l3.remove("Item 1");
// Remove all items in l4
l4.removeAll();
// Print get methods
System.out.println("Item at index 0 in l1 is "+l1.getItem(0));
System.out.println("Visible index for l1 is "+l1.getVisibleIndex());
System.out.println("No.of rows of l2 is "+l2.getRows());
System.out.println("No.of items in l3 is "+l3.getItemCount());
System.out.println("Is 0 index selected in l3? "+l1.isIndexSelected(0));
System.out.println("Is multi select enabled in l2? "+l1.isMultipleMode());
// Add all lists
add(l1);
add(l2);
add(l3);
add(l4);
setSize(400,400);
setVisible(true);
}
public static void main(String args[])
{
new AWTList();
}
}
import java.awt.*;
import java.awt.event.*;
class AWTChoice extends Frame
{
Choice c,h,r;
public AWTChoice()
{
createAndShowGUI();
}
private void createAndShowGUI()
{
setTitle("Choice in AWT Example");
setLayout(new FlowLayout());
// First, create a choice
c=new Choice();
// Add items
c.add("Apple");
c.add("Mango");
c.add("Orange");
c.add("Grapes");
c.add("Strawberry");
c.add("Strawberry");
// Set a selected index, default is 0
c.select(2);
// Insert item at give index
c.insert("Guava",3);
// Remove the first Strawberry
c.remove("Strawberry");
// This is another choice
h=new Choice();
// Add items to h
h.addItem("Vanilla");
h.addItem("Chocolate");
h.addItem("Butterscotch");
h.addItem("Strawberry");
// Remove an item at given index
h.remove(2);
// Select Strawberry (case-senstive!!)
h.select("Strawberry");
// One more, last one!
r=new Choice();
// Add items
r.add("Item 1");
r.add("Item 2");
r.add("Item 3");
r.add("Item 4");
// Now, remove all!
r.removeAll();
// Add choices
add(c);
add(h);
add(r);
// Print get methods
System.out.println("Selected index in c "+c.getSelectedIndex());
System.out.println("Selected item in h "+h.getSelectedItem());
System.out.println("No.of items in r "+r.getItemCount());
setSize(400,400);
setVisible(true);
}
public static void main(String args[])
{
new AWTChoice();
}
}
import java.awt.*;
import java.awt.event.*;
class AWTCheckbox extends Frame
{
Checkbox c1,c2,c3,c4,c5;
CheckboxGroup cg;
public AWTCheckbox()
{
createAndShowGUI();
}
private void createAndShowGUI()
{
setTitle("Checkbox in AWT Demo");
setLayout(new FlowLayout());
// Create a group
// Checkboxes in a group become
// radio buttons
cg=new CheckboxGroup();
// No label, not selected
c1=new Checkbox();
// Labeled and not selected
c2=new Checkbox("Checkbox 2");
// Labeled and selected
c3=new Checkbox("Checkbox 3",true);
// -- Radio buttons -- //
// Labeled, selected and in cg group
c4=new Checkbox("Checkbox 4",true,cg);
// Same as above but parameter shift
c5=new Checkbox("Checkbox 5",cg,true);
// Set to a checkbox group
// Now c3 becomes a radio button
c3.setCheckboxGroup(cg);
// -- Other methods -- //
// Set label
c1.setLabel("Checkbox 1");
// Set state
c2.setState(true);
// Add all checkboxes
add(c1);
add(c2);
add(c3);
add(c4);
add(c5);
setSize(400,400);
setVisible(true);
}
public static void main(String args[])
{
new AWTCheckbox();
}
}
import java.awt.*;
class AWTTextField extends Frame
{
TextField t1,t2,t3,t4;
public AWTTextField()
{
createAndShowGUI();
}
private void createAndShowGUI()
{
setTitle("TextField in AWT Demo");
setLayout(new FlowLayout());
t1=new TextField();
t2=new TextField(20);
t3=new TextField("Third textfield");
t4=new TextField("Fourth textfield",40);
// Set max visible chars
t1.setColumns(25);
// Set echo char (for password fields)
t2.setEchoChar('*');
// Set text
t1.setText("First textfield");
// Select all
t3.selectAll();
// Set position of caret
t4.setCaretPosition(2);
// Make t1 non-editable
t1.setEditable(false);
// Set custom background,foreground
t1.setBackground(Color.LIGHT_GRAY);
t1.setForeground(Color.RED);
// Add all textfields
add(t1);
add(t2);
add(t3);
add(t4);
// Print textfield properties
System.out.println("Is t1 editable? "+t1.isEditable());
System.out.println("Is echo char set for t1? "+t1.echoCharIsSet());
System.out.println("Echo char for t2 "+t2.getEchoChar());
System.out.println("Selected text in t3 "+t3.getSelectedText());
System.out.println("Caret position in t4 "+t4.getCaretPosition());
setSize(400,400);
setVisible(true);
}
public static void main(String args[])
{
new AWTTextField();
}
}
