?? absolutelayoutdemo.java
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/* * AbsoluteLayoutDemo.java is a 1.4 application that requires no other files. */import java.awt.Container;import java.awt.Insets;import java.awt.Dimension;import javax.swing.JButton;import javax.swing.JFrame;public class AbsoluteLayoutDemo { public static void addComponentsToPane(Container pane) { pane.setLayout(null); JButton b1 = new JButton("one"); JButton b2 = new JButton("two"); JButton b3 = new JButton("three"); pane.add(b1); pane.add(b2); pane.add(b3); Insets insets = pane.getInsets(); Dimension size = b1.getPreferredSize(); b1.setBounds(25 + insets.left, 5 + insets.top, size.width, size.height); size = b2.getPreferredSize(); b2.setBounds(55 + insets.left, 40 + insets.top, size.width, size.height); size = b3.getPreferredSize(); b3.setBounds(150 + insets.left, 15 + insets.top, size.width + 50, size.height + 20); } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true); //Create and set up the window. JFrame frame = new JFrame("AbsoluteLayoutDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Set up the content pane. addComponentsToPane(frame.getContentPane()); //Size and display the window. Insets insets = frame.getInsets(); frame.setSize(300 + insets.left + insets.right, 125 + insets.top + insets.bottom); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); }}
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