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Commit 35b2b43

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layout in awt
Java swing and awt layout Null Layout, BorderLayout, FlowLayout, GridLayout
1 parent 71559ab commit 35b2b43

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package layout;
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import java.awt.Color;
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import java.awt.Container;
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import javax.swing.JFrame;
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import javax.swing.JTextArea;
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/**
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*
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* @author rafiul islam
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*/
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public class NullLayout {
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/**
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* Null Layout simply means fixed position.
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* When a component set on panel with a bound the will not
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* adjust with frame resize.
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*/
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public NullLayout(){
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JFrame frame = new JFrame("Null Layout"); // create a frame
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frame.setBounds(10, 10, 800, 450); // set position on screen
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // set exit on close
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Container pane = frame.getContentPane(); // get the panel on frame
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pane.setLayout(null); // set the panel layout null
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pane.setBackground(Color.BLUE); // set panel or frame background color
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JTextArea txtArea = new JTextArea(); // create a text area component
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txtArea.setBounds(0, 0, 700, 400); // set position on frame panel
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pane.add(txtArea); // add the text area component on panel
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frame.setResizable(true); // set frame resizable true
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frame.setVisible(true); // set frame visible after execution
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}
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// driver function
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public static void main(String[] args) {
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new NullLayout(); // calling the object that will display the swing frame
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}
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}
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package layout;
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import java.awt.BorderLayout;
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import java.awt.Color;
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import java.awt.Container;
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import java.awt.Dimension;
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import javax.swing.JFrame;
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import javax.swing.JLabel;
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import javax.swing.SwingConstants;
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import javax.swing.SwingUtilities;
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/**
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*
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* @author rafiul islam
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*/
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public class TheBorderLayout {
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/**
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* Border Layout provide a directional based layout.
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* A component can be set after, before, left , right,
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* top bottom of another.
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*
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* BorderLayout class provide some static positioning string
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* to set the components on a preferred position
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*
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* @see java.awt.BorderLayout
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*/
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public TheBorderLayout(){
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JFrame frame = new JFrame("Border Layout");// create a frame window
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frame.setPreferredSize(new Dimension(400, 220));// set dimension instead of position on screen
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frame.setResizable(true);// set resize of the window frame true
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//set stop the program for close the frame
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Container pane = frame.getContentPane();// get the content panel of the frame
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pane.setLayout(new BorderLayout());// set the panel layout
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JLabel top = new JLabel("I AM FROM TOP",SwingConstants.CENTER);//create a jlabel and set the text on center
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top.setBackground(Color.red); //set the jabel background color
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top.setOpaque(true);// set background color visible
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JLabel bottom = new JLabel("I AM FROM BOTTOM",SwingConstants.CENTER);
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bottom.setBackground(Color.LIGHT_GRAY);
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bottom.setOpaque(true);
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JLabel right = new JLabel("I AM FROM RIGHT",SwingConstants.CENTER);
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right.setBackground(Color.ORANGE);
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right.setOpaque(true);
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JLabel left = new JLabel("I AM FROM LEFT",SwingConstants.CENTER);
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left.setBackground(Color.GREEN);
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left.setOpaque(true);
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JLabel center = new JLabel("I AM FROM CENTER",SwingConstants.CENTER);
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center.setBackground(Color.PINK);
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center.setOpaque(true);
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pane.add(top, BorderLayout.PAGE_START);// set on the top
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pane.add(left, BorderLayout.WEST); // set on the left
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pane.add(right, BorderLayout.EAST); // set on the right
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pane.add(bottom, BorderLayout.PAGE_END); // set on the bottom
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pane.add(center, BorderLayout.CENTER); // set on the center
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frame.pack(); // pack everything on the frame and ready to display
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frame.setVisible(true); // set frame visible
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}
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public static class WithRowCol{
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public WithRowCol(){
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JFrame frame = new JFrame("Border Layout With GAP");//create a frame window
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frame.setPreferredSize(new Dimension(400, 220)); //set dimension
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//set close to exit
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frame.setResizable(true); // set frame resizable
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Container pane = frame.getContentPane(); // get content panel from frame
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pane.setLayout(new BorderLayout(20, 10));// set layout with Horizontal and Vertical Px gap
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JLabel top = new JLabel("I AM FROM TOP",SwingConstants.CENTER);//create a jlabel and set the text on center
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top.setBackground(Color.red); //set the jabel background color
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top.setOpaque(true);// set background color visible
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JLabel bottom = new JLabel("I AM FROM BOTTOM",SwingConstants.CENTER);
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bottom.setBackground(Color.LIGHT_GRAY);
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bottom.setOpaque(true);
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JLabel right = new JLabel("I AM FROM RIGHT",SwingConstants.CENTER);
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right.setBackground(Color.ORANGE);
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right.setOpaque(true);
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JLabel left = new JLabel("I AM FROM LEFT",SwingConstants.CENTER);
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left.setBackground(Color.GREEN);
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left.setOpaque(true);
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JLabel center = new JLabel("I AM FROM CENTER",SwingConstants.CENTER);
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center.setBackground(Color.PINK);
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center.setOpaque(true);
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pane.add(top, BorderLayout.PAGE_START);// set on the top
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pane.add(left, BorderLayout.WEST); // set on the left
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pane.add(right, BorderLayout.EAST); // set on the right
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pane.add(bottom, BorderLayout.PAGE_END); // set on the bottom
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pane.add(center, BorderLayout.CENTER); // set on the center
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frame.pack();
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frame.setVisible(true);
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}
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}
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// driver function
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public static void main(String[] args) {
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//create a swing thread for run first class
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SwingUtilities.invokeLater(new Runnable(){
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public void run(){
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new TheBorderLayout();
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}
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});
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//create another swing thread for run the sub-class
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SwingUtilities.invokeLater(new Runnable(){
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public void run(){
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new TheBorderLayout.WithRowCol();
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}
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});
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}
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}
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package layout;
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import java.awt.FlowLayout;
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import java.awt.Color;
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import java.awt.Container;
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import java.awt.Dimension;
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import javax.swing.JFrame;
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import javax.swing.JLabel;
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import javax.swing.SwingConstants;
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/**
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*
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* @author rafiul islam
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*/
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public class TheFlowLayout {
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/**
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* Flow Layout provide the view of automatically rearranged of components.
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* Flow window will rearrange every component position with their
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* preferred size on frame after resize the frame.It will also allow
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* to set horizontal and vertical gap between components.
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*
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* @see java.awt.FlowLayout
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*/
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public TheFlowLayout() {
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JFrame frame = new JFrame("Border Layout");// create a frame window
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frame.setPreferredSize(new Dimension(600, 340));// set dimension instead of position on screen
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frame.setResizable(true);// set resize of the window frame true
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//set stop the program for close the frame
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Container pane = frame.getContentPane();// get the content panel of the frame
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pane.setLayout(new FlowLayout(FlowLayout.CENTER,10,15));// set the panel layout
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Dimension d = new Dimension(80, 30);// size for every jlabel
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JLabel lb1 = new JLabel("One",SwingConstants.CENTER);//create a jlabel and set the text on center
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lb1.setBackground(Color.red); //set the jabel background color
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lb1.setOpaque(true);// set background color visible
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lb1.setPreferredSize(d);// set the label size
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JLabel lb2 = new JLabel("Two",SwingConstants.CENTER);
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lb2.setBackground(Color.LIGHT_GRAY);
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lb2.setOpaque(true);
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lb2.setPreferredSize(d);
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JLabel lb3 = new JLabel("Three",SwingConstants.CENTER);
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lb3.setBackground(Color.ORANGE);
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lb3.setOpaque(true);
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lb3.setPreferredSize(d);
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JLabel lb4 = new JLabel("Four",SwingConstants.CENTER);
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lb4.setBackground(Color.GREEN);
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lb4.setOpaque(true);
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lb4.setPreferredSize(d);
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JLabel lb5 = new JLabel("Five",SwingConstants.CENTER);
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lb5.setBackground(Color.PINK);
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lb5.setOpaque(true);
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lb5.setPreferredSize(d);
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pane.add(lb1);// add componets on the frame panel with index(start from 0)
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pane.add(lb4);
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pane.add(lb3);
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pane.add(lb2,1);
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pane.add(lb5, 0);
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frame.pack(); // pack everything on the frame and ready to display
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frame.setVisible(true); // set frame visible
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}
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// driver function
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public static void main(String[] args) {
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new TheFlowLayout(); // invoke the frame to display
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}
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}
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package layout;
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import java.awt.Color;
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import java.awt.Container;
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import java.awt.Dimension;
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import java.awt.GridLayout;
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import javax.swing.JFrame;
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import javax.swing.JLabel;
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import javax.swing.SwingConstants;
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/**
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*
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* @author rafiul islam
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*/
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public class TheGridLayout {
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/**
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* Grid Layout arrange component in row and col index.
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*
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* @see java.awt.GridLayout
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*/
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public TheGridLayout(){
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JFrame frame = new JFrame("Grid Layout");//create a jframe window
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frame.setPreferredSize(new Dimension(600, 350));//set window size
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//set close to exit
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frame.setResizable(true);//set frame resizable
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Container pane = frame.getContentPane();//get the panel of frame window
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pane.setLayout(new GridLayout(2, 3, 15, 10));//set panel layout:ROW,COL, HGAP, VGAP
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Dimension d = new Dimension(100, 60);//dimension for components size
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JLabel lb1 = new JLabel("One",SwingConstants.CENTER);//create a label component
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lb1.setBackground(Color.cyan);//set label background color
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lb1.setOpaque(true);//set background color to visible
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lb1.setPreferredSize(d);//set size
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JLabel lb2 = new JLabel("Two",SwingConstants.CENTER);//create a label component
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lb2.setBackground(Color.red);//set label background color
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lb2.setOpaque(true);//set background color to visible
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lb2.setPreferredSize(d);//set size
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JLabel lb3 = new JLabel("Three",SwingConstants.CENTER);//create a label component
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lb3.setBackground(Color.green);//set label background color
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lb3.setOpaque(true);//set background color to visible
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lb3.setPreferredSize(d);//set size
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JLabel lb4 = new JLabel("Four",SwingConstants.CENTER);//create a label component
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lb4.setBackground(Color.yellow);//set label background color
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lb4.setOpaque(true);//set background color to visible
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lb4.setPreferredSize(d);//set size
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pane.add(lb1);
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pane.add(lb4);
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pane.add(lb3);
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pane.add(lb2, 0); //add the component with index
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frame.pack();//ready all component to view
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frame.setVisible(true); //set frame window visible
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}
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//driver function
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public static void main(String[] args) {
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new TheGridLayout();
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}
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}

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