choice.java~12~

jbuilder 100例 java源码学习,非常不错,有需要朋友下来

package choice;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import com.borland.jbcl.layout.*;

public class choice extends Applet {
  boolean isStandalone = false;
  XYLayout xYLayout1 = new XYLayout();
  Choice choice1 = new Choice();
  /**Get a parameter value*/
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  /**Construct the applet*/
  public choice() {
  }
  /**Initialize the applet*/
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  /**Component initialization*/
  private void jbInit() throws Exception {
    this.setLayout(xYLayout1);
    choice1.setFont(new java.awt.Font("Dialog", 0, 16));
    choice1.addItemListener(new java.awt.event.ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        choice1_itemStateChanged(e);
      }
    });
    choice1.addHierarchyBoundsListener(new java.awt.event.HierarchyBoundsAdapter() {
    });
    this.addHierarchyBoundsListener(new java.awt.event.HierarchyBoundsAdapter() {
    });
    this.addMouseListener(new java.awt.event.MouseAdapter() {
    });
    this.add(choice1,     new XYConstraints(6, 9, 77, 20));
    choice1.addItem("圆形");
    choice1.addItem("正方形");
    choice1.addItem("扇形");
    choice1.addItem("椭圆");
  }
  /**Get Applet information*/
  public String getAppletInfo() {
    return "Applet Information";
  }
  /**Get parameter info*/
  public String[][] getParameterInfo() {
    return null;
  }
  public void paint(Graphics g){
    switch(choice1.getSelectedIndex()){
      case 0:
         g.drawOval(100,100,50,50);
         break;
      case 1:
         g.drawRect(100,100,50,50);
         break;
      case 2:
         g.drawArc(100,100,50,50,0,140);
         break;
      case 3:
         g.drawOval(100,100,50,70);
         break;
    }
  }

  void choice1_itemStateChanged(ItemEvent e) {
     repaint();
  }
}