Lecture 16
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The document discusses several LayoutManagers in Java - FlowLayout, BorderLayout, CardLayout, and GridLayout. FlowLayout lays out components in left-to-right rows that wrap as needed. BorderLayout divides the container into five regions (north, south, east, west, center) that each hold one component. CardLayout stacks components like cards where only the top is visible and methods allow changing the visible component. GridLayout arranges components in a rectangular grid specified by rows and columns.
![Core Java
Debasish Pratihari
BorderLayoutManager:
The BorderLayoutManager divides the container
into file regions like
o EAST
o WEST
o NORTH
o SOUTH
o CENTER.
Each region can accommodate only one
component.
Example :
import java.awt.*;
class BorderTest extends Frame{
Button b1,b2,b3,b4,b5;
BorderTest(){
b1= new Button("EAST");
b2= new Button("WEST");
b3= new Button("NORTH");
b4= new Button("SOUTH");
b5=new Button("CENTER");
add(b1, BorderLayout.EAST);
add(b2,BorderLayout.WEST);
add(b3,BorderLayout.NORTH);
add(b4,BorderLayout.SOUTH);
add(b5,BorderLayout.CENTER);
setTitle("BorderDemo By Debasish Pratihari");
setSize(200,200);
setVisible(true);
}
public static void main(String args[]){
new BorderTest();
}
}
Lecture/core/awt4/16
Page #2
feel the Technology…](https://image.slidesharecdn.com/handout-16-131022003530-phpapp01/85/Lecture-16-2-320.jpg)
![Core Java
Debasish Pratihari
CardLayout:
The CardLayout manager arrange the
components in a stack, one on the top of
another.
The first component will be at the top, so will be
the only visible component.
Methods to operate CardLayout
o void previous(Container parent)
o void first (Container parent)
o void last(Container parent)
o void show(Container parent)
Example :
import java.awt.*;
import java.awt.event.*;
class CardTest extends Frame implements ActionListener{
Button b1,b2,b3,b4,b5;
CardLayout card;
CardTest(){
b1= new Button("JAVA");
b2= new Button("J2EE");
b3= new Button("C");
b4= new Button("C++");
b5=new Button("ORACLE");
card= new CardLayout(20,50);
setLayout(card);
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
b5.addActionListener(this);
add(b1,"card
add(b2,"card
add(b3,"card
add(b4,"card
add(b5,"card
1");
2");
3");
4");
5");
setTitle("BorderDemo By Debasish Pratihari");
setSize(200,200);
setVisible(true);
}
public void actionPerformed(ActionEvent e){
card.next(this);
}
}
public static void main(String args[]){
new CardTest();
}
}
Lecture/core/awt4/16
Page #3
feel the Technology…](https://image.slidesharecdn.com/handout-16-131022003530-phpapp01/85/Lecture-16-3-320.jpg)
![Core Java
Debasish Pratihari
GridLayout:
A GridLayout manager arranges components in
a rectangular grid within a container.
Constructors:
GridLayout()
GridLayout(int rows, int cols)
GridLayout(int
vgaps)
rows,int
cols,
int
hgaps,
int
Example :
import java.awt.*;
25%
Note :
class GridTest extends Frame {
GridTest(){
GridLayout layout= new GridLayout(3,3,10,10);
setLayout(layout);
for(int i=1;i<=9;i++)
add(new Button("Button "+i));
If you want the window
to assume the size that
just accommodates the
component it contains,
use pack()
setTitle("GridDemo By Debasish Pratihari");
setVisible(true);
pack();
}
public static void main(String ar[]){
new GridTest();
}
}
Output :
Lecture/core/awt4/16
Page #4
feel the Technology…](https://image.slidesharecdn.com/handout-16-131022003530-phpapp01/85/Lecture-16-4-320.jpg)
Lecture 16
- 1. Core Java Debasish Pratihari LayoutManager : LayoutManager determines the way components will be arranged inside the container. All container’s have their default LayoutManger. However You can apply a different LayoutManager to the containers if required. LayoutManager Classes are Provided in java.awt and javax.swing package. FlowLayoutManager : FlowLayout Manager lays down the components in a row and automatically spills components onto the next row if row is full. The default positing of the components is centered in the container, and the default orientation is from left to right. Constants to Control FlowLayoutManager: o LEFT o RIGHT o CENTER o LEADING TRAILING Examples: FlowLayout f= new FlowLayout(); FlowLayout f= new FlowLayout(FlowLayout.LEFT); FlowLayout f= new FlowLayout(FlowLayout.LEFT,10,20); Lecture/core/awt4/16 Page #1 feel the Technology…
- 2. Core Java Debasish Pratihari BorderLayoutManager: The BorderLayoutManager divides the container into file regions like o EAST o WEST o NORTH o SOUTH o CENTER. Each region can accommodate only one component. Example : import java.awt.*; class BorderTest extends Frame{ Button b1,b2,b3,b4,b5; BorderTest(){ b1= new Button("EAST"); b2= new Button("WEST"); b3= new Button("NORTH"); b4= new Button("SOUTH"); b5=new Button("CENTER"); add(b1, BorderLayout.EAST); add(b2,BorderLayout.WEST); add(b3,BorderLayout.NORTH); add(b4,BorderLayout.SOUTH); add(b5,BorderLayout.CENTER); setTitle("BorderDemo By Debasish Pratihari"); setSize(200,200); setVisible(true); } public static void main(String args[]){ new BorderTest(); } } Lecture/core/awt4/16 Page #2 feel the Technology…
- 3. Core Java Debasish Pratihari CardLayout: The CardLayout manager arrange the components in a stack, one on the top of another. The first component will be at the top, so will be the only visible component. Methods to operate CardLayout o void previous(Container parent) o void first (Container parent) o void last(Container parent) o void show(Container parent) Example : import java.awt.*; import java.awt.event.*; class CardTest extends Frame implements ActionListener{ Button b1,b2,b3,b4,b5; CardLayout card; CardTest(){ b1= new Button("JAVA"); b2= new Button("J2EE"); b3= new Button("C"); b4= new Button("C++"); b5=new Button("ORACLE"); card= new CardLayout(20,50); setLayout(card); b1.addActionListener(this); b2.addActionListener(this); b3.addActionListener(this); b4.addActionListener(this); b5.addActionListener(this); add(b1,"card add(b2,"card add(b3,"card add(b4,"card add(b5,"card 1"); 2"); 3"); 4"); 5"); setTitle("BorderDemo By Debasish Pratihari"); setSize(200,200); setVisible(true); } public void actionPerformed(ActionEvent e){ card.next(this); } } public static void main(String args[]){ new CardTest(); } } Lecture/core/awt4/16 Page #3 feel the Technology…
- 4. Core Java Debasish Pratihari GridLayout: A GridLayout manager arranges components in a rectangular grid within a container. Constructors: GridLayout() GridLayout(int rows, int cols) GridLayout(int vgaps) rows,int cols, int hgaps, int Example : import java.awt.*; 25% Note : class GridTest extends Frame { GridTest(){ GridLayout layout= new GridLayout(3,3,10,10); setLayout(layout); for(int i=1;i<=9;i++) add(new Button("Button "+i)); If you want the window to assume the size that just accommodates the component it contains, use pack() setTitle("GridDemo By Debasish Pratihari"); setVisible(true); pack(); } public static void main(String ar[]){ new GridTest(); } } Output : Lecture/core/awt4/16 Page #4 feel the Technology…