develop.java

很好得jbuilder100例源代码

package choiceupdate;

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

public class develop extends Applet {
  boolean isStandalone = false;
  String str1,str2,str3;
  XYLayout xYLayout1 = new XYLayout();
  Choice choice1 = new Choice();
  TextField text1 = new TextField();
  TextField text2 = new TextField();
  TextField text3 = new TextField();
  Label label1 = new Label();
  Label label2 = new Label();
  Label label3 = new Label();
  Label label4 = new Label();
  /**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 develop() {
  }
  /**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);
      }
    });
    label1.setFont(new java.awt.Font("Dialog", 0, 16));
    label1.setText("图形");
    label2.setFont(new java.awt.Font("Dialog", 0, 16));
    label2.setText("高度");
    label3.setFont(new java.awt.Font("Dialog", 0, 16));
    label3.setText("长度");
    label4.setFont(new java.awt.Font("Dialog", 0, 16));
    label4.setText("角度");


    text1.setText("10");
    text1.addFocusListener(new java.awt.event.FocusAdapter() {
      public void focusLost(FocusEvent e) {
        text1_focusLost(e);
      }
    });
    text2.setText("10");
    text2.addFocusListener(new java.awt.event.FocusAdapter() {
      public void focusLost(FocusEvent e) {
        text2_focusLost(e);
      }
    });
    text3.setText("10");
    text3.addFocusListener(new java.awt.event.FocusAdapter() {
      public void focusLost(FocusEvent e) {
        text3_focusLost(e);
      }
    });

    this.add(choice1,  new XYConstraints(137, 12, 81, 21));
    choice1.addItem("圆形");
    choice1.addItem("方形");
    choice1.addItem("弧形");
    this.add(text1,   new XYConstraints(137, 40, 60, -1));
    this.add(text2,   new XYConstraints(137, 70, 60, -1));
    this.add(text3,     new XYConstraints(137, 100, 60, -1));
    this.add(label1,   new XYConstraints(76, 12, 54, -1));
    this.add(label3,    new XYConstraints(76, 70, 54, -1));
    this.add(label4,    new XYConstraints(76, 100, 54, -1));
    this.add(label2,   new XYConstraints(76, 40, 54, -1));
  }
  /**Get Applet information*/
  public String getAppletInfo() {
    return "Applet Information";
  }
  /**Get parameter info*/
  public String[][] getParameterInfo() {
    return null;
  }

  void choice1_itemStateChanged(ItemEvent e) {
        repaint();
  }
  public void paint(Graphics g){
      g.setColor(Color.red);
      switch(choice1.getSelectedIndex() ){
         case 0:
               str1=text1.getText() ;
               str2=text2.getText() ;
             if (str1==null)
                str1="1";
             if (str2==null)
                str2="1";
             try{
                int h=Integer.parseInt(str1);
                int w=Integer.parseInt(str2);
                g.drawOval(100,150,w,h);
             }
             catch(Exception e) {
                e.printStackTrace();
             }
          case 1:
              str1=text1.getText() ;
              str2=text2.getText() ;
             if (str1==null)
                str1="1";
             if (str2==null)
                str2="1";
             try{
                int h=Integer.parseInt(str1);
                int w=Integer.parseInt(str2);
                g.drawRect(100,150,w,h);
             }
             catch(Exception e) {
                e.printStackTrace();
             }
          case 2:
               str1=text1.getText() ;
               str2=text2.getText() ;
               str3=text3.getText() ;
             if (str1==null)
                str1="1";
             if (str2==null)
                str2="1";
             if (str3==null)
                str3="1";
             try{
                int h=Integer.parseInt(str1);
                int w=Integer.parseInt(str2);
                int a=Integer.parseInt(str3);
                g.drawArc(100,150,w,h,0,a);
             }
             catch(Exception e) {
                e.printStackTrace();
             }
         }
    }

  void text1_focusLost(FocusEvent e) {
     repaint();
  }



  void text3_focusLost(FocusEvent e) {
     repaint();
  }

  void text2_focusLost(FocusEvent e) {
     repaint();
  }



}