painter.java

来自「32个java程序源代码」· Java 代码 · 共 63 行

// Tutorial 21: Painter.java
// Application enables user to draw on a subclass of JPanel.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;

public class Painter extends JFrame
{
   // DrawJPanel for circles drawn by user
   private DrawJPanel myDrawJPanel;

   // no-argument constructor
   public Painter()
   {
      createUserInterface();
   }

   // set up the GUI components
   public void createUserInterface()
   {
      // get content pane for attaching GUI components
      Container contentPane = getContentPane();

      // enable explicit positioning of GUI components 
      contentPane.setLayout( null );
      
      // set up myDrawJPanel
      myDrawJPanel = new DrawJPanel();
      myDrawJPanel.setBounds( 0, 0, 300, 300 );
      contentPane.add( myDrawJPanel );

      // set properties of application's window
      setTitle( "Painter" ); // set title bar text
      setSize( 300, 300 );   // set window size
      setVisible( true );    // display window

   } // end method createUserInterface

   // main method
   public static void main( String[] args )
   {
      Painter application = new Painter();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

   } // end method main

} // end class Painter

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