qchange.java

很好得jbuilder100例源代码

package untitled2;

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

public class qchange extends Applet {
  double c[] = {1016.04,0.4536,0.0567};
  double d[] = {1000,1,0.001};
  double mid;
  double start;
  double end;
  int n = 0;
  int m = 0;
  boolean isStandalone = false;
  JRadioButton jRadioButton1 = new JRadioButton();
  JRadioButton jRadioButton2 = new JRadioButton();
  JRadioButton jRadioButton3 = new JRadioButton();
  JRadioButton jRadioButton4 = new JRadioButton();
  JRadioButton jRadioButton5 = new JRadioButton();
  JRadioButton jRadioButton6 = new JRadioButton();
  ButtonGroup buttonGroup1 = new ButtonGroup();
  ButtonGroup buttonGroup2 = new ButtonGroup();
  JTextField text1 = new JTextField();
  JTextField text2 = new JTextField();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  XYLayout xYLayout1 = new XYLayout();
  Label label1 = new Label();
  Label label2 = 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 qchange() {
  }
  /**Initialize the applet*/
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  /**Component initialization*/
  private void jbInit() throws Exception {
    jRadioButton1.setFont(new java.awt.Font("Dialog", 0, 16));
    jRadioButton1.setText("英吨");
    jRadioButton1.addItemListener(new java.awt.event.ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        jRadioButton1_itemStateChanged(e);
      }
    });
    this.setLayout(xYLayout1);
    jRadioButton2.setFont(new java.awt.Font("Dialog", 0, 16));
    jRadioButton2.setText("磅");
    jRadioButton2.addItemListener(new java.awt.event.ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        jRadioButton1_itemStateChanged(e);
      }
    });
    jRadioButton2.addHierarchyBoundsListener(new java.awt.event.HierarchyBoundsAdapter() {

    });
    jRadioButton3.setFont(new java.awt.Font("Dialog", 0, 16));
    jRadioButton3.setText("盎司");
    jRadioButton3.addItemListener(new java.awt.event.ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        jRadioButton1_itemStateChanged(e);
      }
    });
    jRadioButton4.setFont(new java.awt.Font("Dialog", 0, 16));
    jRadioButton4.setText("吨");
    jRadioButton4.addItemListener(new java.awt.event.ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        jRadioButton2_itemStateChanged(e);
      }
    });
    jRadioButton5.setFont(new java.awt.Font("Dialog", 0, 16));
    jRadioButton5.setText("千克");
    jRadioButton5.addItemListener(new java.awt.event.ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        jRadioButton2_itemStateChanged(e);
      }
    });
    jRadioButton6.setFont(new java.awt.Font("Dialog", 0, 16));
    jRadioButton6.setText("克");
    jButton1.setText("-->");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    jButton2.setText("-->");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton2_actionPerformed(e);
      }
    });
    text1.setText("0");
    text2.setText("0");
    label1.setText("英");
    label2.setText("公");
    this.add(jRadioButton1,  new XYConstraints(40, 24, -1, -1));
    this.add(jRadioButton2,  new XYConstraints(40, 56, -1, -1));
    this.add(jRadioButton3,  new XYConstraints(40, 88, -1, -1));
    this.add(jRadioButton5,  new XYConstraints(214, 56, -1, -1));
    this.add(jRadioButton4,  new XYConstraints(214, 24, -1, -1));
    this.add(jRadioButton6,  new XYConstraints(214, 88, -1, -1));
    buttonGroup1.add(jRadioButton1);
    buttonGroup1.add(jRadioButton2);
    buttonGroup1.add(jRadioButton3);
    buttonGroup2.add(jRadioButton4);
    buttonGroup2.add(jRadioButton5);
    buttonGroup2.add(jRadioButton6);
    this.add(text1,   new XYConstraints(40, 126, 176, 24));
    this.add(jButton1, new XYConstraints(219, 127, 58, 21));
    this.add(text2,  new XYConstraints(39, 165, 178, 25));
    this.add(jButton2, new XYConstraints(220, 167, 58, 21));
    this.add(label1,  new XYConstraints(8, 124, 27, 23));
    this.add(label2,  new XYConstraints(7, 165, 28, 25));
  }
  /**Get Applet information*/
  public String getAppletInfo() {
    return "Applet Information";
  }
  /**Get parameter info*/
  public String[][] getParameterInfo() {
    return null;
  }

  void jRadioButton1_itemStateChanged(ItemEvent e) {
      if (jRadioButton1.isSelected())
         n = 1;
      if (jRadioButton2.isSelected())
         n = 2;
      if (jRadioButton3.isSelected())
         n = 3;
  }

  void jRadioButton2_itemStateChanged(ItemEvent e) {
      if (jRadioButton4.isSelected())
         m = 1;
      if (jRadioButton5.isSelected())
         m = 2;
      if (jRadioButton6.isSelected())
         m = 3;
  }

  void jButton1_actionPerformed(ActionEvent e) {
      String str = text1.getText();
      if (str!=null){
        try{
           start = Double.parseDouble(str);
           switch (n){
               case 1:
                  mid = start * c[0];
                  break;
               case 2:
                  mid = start * c[1];
                  break;
               case 3:
                  mid = start * c[2];
                  break;
           }
           switch (m){
                  case 1:
                  end = mid / d[0];
                  break;
               case 2:
                  end = mid / d[1];
                  break;
               case 3:
                  end = mid / d[2];
                  break;
            }
            text2.setText(String.valueOf(end));
            }
            catch(Exception ex){}
     }
  }

void jButton2_actionPerformed(ActionEvent e) {
      String str = text2.getText();
      if (str!=null){
        try{
           start = Double.parseDouble(str);
           switch (m){
               case 1:
                  mid = start * d[0];
                  break;
               case 2:
                  mid = start * d[1];
                  break;
               case 3:
                  mid = start * d[2];
                  break;
           }
           switch (n){
                  case 1:
                  end = mid / c[0];
                  break;
               case 2:
                  end = mid / c[1];
                  break;
               case 3:
                  end = mid / c[2];
                  break;
            }
            text1.setText(String.valueOf(end));
            }
            catch(Exception ex){}
     }
  }

}