mainframe.java~7~

这是各类实用工具的源码100例

package jcolordemo;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;

public class MainFrame extends JFrame implements ChangeListener {
  private JPanel contentPane;
  private BorderLayout borderLayout1 = new BorderLayout();
  private JPanel jPanel1 = new JPanel();
  private JPanel jPanel2 = new JPanel();
  private GridLayout gridLayout1 = new GridLayout();
  private JSlider redSlider = new JSlider();
  private JSlider greenSlider = new JSlider();
  private JSlider blueSlider = new JSlider();
  private JSlider alphaSlider = new JSlider();
  private TitledBorder titledBorder1;
  private TitledBorder titledBorder2;
  private TitledBorder titledBorder3;
  private TitledBorder titledBorder4;
  private JLabel jLabel1 = new JLabel();

  ColorCanvas canvas = new ColorCanvas();

  //Construct the frame
  public MainFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(MainFrame.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    titledBorder1 = new TitledBorder(BorderFactory.createEtchedBorder(Color.white,new Color(142, 142, 142)),"Red");
    titledBorder2 = new TitledBorder(BorderFactory.createEtchedBorder(Color.white,new Color(142, 142, 142)),"Green");
    titledBorder3 = new TitledBorder(BorderFactory.createEtchedBorder(Color.white,new Color(142, 142, 142)),"Blue");
    titledBorder4 = new TitledBorder(BorderFactory.createEtchedBorder(Color.white,new Color(142, 142, 142)),"Alpha");
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("JColorDemo");
    jPanel2.setLayout(gridLayout1);
    gridLayout1.setColumns(2);
    gridLayout1.setHgap(5);
    gridLayout1.setRows(2);
    gridLayout1.setVgap(15);
    redSlider.setMaximum(255);
    redSlider.setBorder(titledBorder1);
    greenSlider.setMaximum(255);
    greenSlider.setBorder(titledBorder2);
    blueSlider.setMaximum(255);
    blueSlider.setBorder(titledBorder3);
    alphaSlider.setMaximum(255);
    alphaSlider.setPaintLabels(true);
    alphaSlider.setPaintTicks(true);
    alphaSlider.setBorder(titledBorder4);
    jLabel1.setHorizontalAlignment(SwingConstants.CENTER);
    jLabel1.setText("调色板程序演示");
    contentPane.add(jPanel1, BorderLayout.CENTER);
    contentPane.add(jPanel2,  BorderLayout.SOUTH);
    jPanel2.add(redSlider, null);
    jPanel2.add(greenSlider, null);
    jPanel2.add(blueSlider, null);
    jPanel2.add(alphaSlider, null);
    contentPane.add(jLabel1, BorderLayout.NORTH);

    this.jPanel1.add(this.canvas);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
  public void stateChanged(ChangeEvent e) {
    /**@todo Implement this javax.swing.event.ChangeListener method*/
    //throw new java.lang.UnsupportedOperationException("Method stateChanged() not yet implemented.");
    JSlider slider = (JSlider)e.getSource();

    if (slider == this.redSlider){
      this.canvas.redValue = slider.getValue();
      this.canvas.setBackgroundColor();
    }

  }

  class ColorCanvas extends Canvas{
    Color color;
    int redValue,greenValue,blueValue;
    int alphaValue=255;

    public ColorCanvas(){
      this.setSize(300,300);
      this.color = new Color(0,0,0);
      this.setBackgroundColor();

    }

    public void setBackgroundColor(){
      this.color = new Color(this.redValue,this.greenValue,this.blueValue,this.alphaValue);
      this.setBackground(this.color);

    }
  }

}