calculatorupdate.java~27~

用java实现了简单的计算器!

package untitled1;

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

public class calculatorupdate extends Applet {
  double startnum;
  boolean isResult = false;
  boolean flagAdd = false;
  boolean flagSub = false;
  boolean flagMul = false;
  boolean flagDiv = false;
  double endnum;
  String str = null;
  boolean isStandalone = false;
  Button button1 = new Button();
  XYLayout xYLayout1 = new XYLayout();
  Button button2 = new Button();
  Button button3 = new Button();
  Button button4 = new Button();
  Button button5 = new Button();
  Button button6 = new Button();
  Button button7 = new Button();
  Button button8 = new Button();
  Button button9 = new Button();
  Button button10 = new Button();
  Button button11 = new Button();
  Button button12 = new Button();
  Button button13 = new Button();
  Button button14 = new Button();
  Button button15 = new Button();
  Button button16 = new Button();
  Button button17 = new Button();
  TextField text = new TextField();
  Button button18 = new Button();
  Button button19 = new Button();
  Button button20 = new Button();
  Button button21 = new Button();
  Button button22 = new Button();
  /**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 calculatorupdate() {
  }
  /**Initialize the applet*/
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  /**Component initialization*/
  private void jbInit() throws Exception {
    button1.setFont(new java.awt.Font("Dialog", 0, 10));
    button1.setLabel("1");
    button1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    this.setLayout(xYLayout1);
    button2.setFont(new java.awt.Font("Dialog", 0, 10));
    button2.setLabel("2");
    button2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button3.setFont(new java.awt.Font("Dialog", 0, 10));
    button3.setLabel("3");
    button3.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button4.setFont(new java.awt.Font("Dialog", 0, 10));
    button4.setLabel("4");
    button4.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button5.setFont(new java.awt.Font("Dialog", 0, 10));
    button5.setLabel("5");
    button5.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button6.setFont(new java.awt.Font("Dialog", 0, 10));
    button6.setLabel("6");
    button6.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button7.setFont(new java.awt.Font("Dialog", 0, 10));
    button7.setLabel("7");
    button7.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button8.setFont(new java.awt.Font("Dialog", 0, 10));
    button8.setLabel("8");
    button8.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button9.setFont(new java.awt.Font("Dialog", 0, 10));
    button9.setLabel("9");
    button9.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button10.setFont(new java.awt.Font("Dialog", 0, 10));
    button10.setLabel("0");
    button10.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    button11.setFont(new java.awt.Font("Dialog", 0, 10));
    button11.setLabel(".");
    button11.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button11_actionPerformed(e);
      }
    });
    button12.setFont(new java.awt.Font("Dialog", 0, 10));
    button12.setLabel("+");
    button12.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button12_actionPerformed(e);
      }
    });
    button13.setFont(new java.awt.Font("Dialog", 0, 10));
    button13.setLabel("c");
    button13.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button13_actionPerformed(e);
      }
    });
    button14.setLabel("=");
    button14.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button14_actionPerformed(e);
      }
    });
    button15.setLabel("-");
    button15.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button15_actionPerformed(e);
      }
    });
    button16.setLabel("*");
    button16.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button16_actionPerformed(e);
      }
    });
    button17.setLabel("/");
    button17.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button17_actionPerformed(e);
      }
    });
    text.setEditable(false);
    text.setText("0");
    button18.setFont(new java.awt.Font("Dialog", 0, 8));
    button18.setLabel("@");
    button18.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button18_actionPerformed(e);
      }
    });
    button19.setEnabled(false);
    button19.setLabel("!");
    button19.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button19_actionPerformed(e);
      }
    });
    button20.setEnabled(false);
    button20.setLabel("sin");
    button21.setEnabled(false);
    button21.setLabel("cos");
    button22.setEnabled(false);
    button22.setLabel("exp");
    this.add(button1,  new XYConstraints(60, 50, 40, 40));
    this.add(button2,   new XYConstraints(120, 50, 40, 40));
    this.add(button3,   new XYConstraints(180, 50, 40, 40));
    this.add(button4,   new XYConstraints(60, 100, 40, 40));
    this.add(button5,   new XYConstraints(120, 100, 40, 40));
    this.add(button6,   new XYConstraints(180, 100, 40, 40));
    this.add(button7,   new XYConstraints(60, 150, 40, 40));
    this.add(button8,   new XYConstraints(120, 150, 40, 40));
    this.add(button9,   new XYConstraints(180, 150, 40, 40));
    this.add(button10,   new XYConstraints(60, 200, 40, 40));
    this.add(button11,   new XYConstraints(120, 200, 40, 40));
    this.add(button12,   new XYConstraints(180, 200, 40, 40));
    this.add(button13,   new XYConstraints(10, 50, 40, 40));
    this.add(button14,    new XYConstraints(230, 50, 50, 40));
    this.add(button15,   new XYConstraints(60, 250, 40, 40));
    this.add(button16,   new XYConstraints(120, 250, 40, 40));
    this.add(button17,   new XYConstraints(180, 250, 40, 40));
    this.add(text,   new XYConstraints(60, 10, 160, 25));
    this.add(button18,   new XYConstraints(230, 10, 50, 30));
    this.add(button19,   new XYConstraints(230, 100, 60, 40));
    this.add(button20,   new XYConstraints(230, 150, 60, 40));
    this.add(button21,   new XYConstraints(230, 200, 60, 40));
    this.add(button22,   new XYConstraints(230, 250, 60, 40));
  }
  /**Get Applet information*/
  public String getAppletInfo() {
    return "Applet Information";
  }
  /**Get parameter info*/
  public String[][] getParameterInfo() {
    return null;
  }

  void button1_actionPerformed(ActionEvent e) {
      if (isResult){
        text.setText("0");
        isResult = !isResult;
      }
      str = text.getText();
      if (str.equals("0")){
        text.setText(e.getActionCommand());
      }
      else{
        str=str+e.getActionCommand();
        text.setText(str);
      }
  }

  void button11_actionPerformed(ActionEvent e) {
      str = text.getText() ;
      if(str.indexOf(".")<=1) {
       str=str+".";
       text.setText(str);
     }
  }

  void button12_actionPerformed(ActionEvent e) {
        startnum = Double.parseDouble(text.getText());
        flagAdd = true;
        isResult = true;
  }

  void button15_actionPerformed(ActionEvent e) {
        startnum = Double.parseDouble(text.getText());
        flagSub = true;
        isResult = true;
  }

  void button16_actionPerformed(ActionEvent e) {
        startnum = Double.parseDouble(text.getText());
        flagMul = true;
  }

  void button17_actionPerformed(ActionEvent e) {
        startnum = Double.parseDouble(text.getText());
        flagDiv = true;
        isResult = true;
  }

  void button13_actionPerformed(ActionEvent e) {
        text.setText("0");
  }

  void button14_actionPerformed(ActionEvent e) {
         String strchip;
        int step;
        endnum = Double.parseDouble(text.getText());
        if(flagAdd){
              text.setText(String.valueOf(startnum+endnum));
              isResult = true;
              flagAdd = !flagAdd;
        }
        if(flagSub){
          text.setText(String.valueOf(startnum-endnum));
          isResult = true;
          flagSub = !flagSub;
        }
        if(flagMul){
          text.setText(String.valueOf(startnum*endnum));
          isResult = true;
          flagMul = !flagMul;
        }
        if((flagDiv)&&(endnum!=0)){
          text.setText(String.valueOf(startnum/endnum));
          isResult = true;
          flagDiv = !flagDiv;
        }
  }

  void button18_actionPerformed(ActionEvent e) {
        button19.setEnabled(!button19.isEnabled());
        button20.setEnabled(!button20.isEnabled());
        button21.setEnabled(!button21.isEnabled());
        button22.setEnabled(!button22.isEnabled());
        text.setText("0");
  }

  void button19_actionPerformed(ActionEvent e) {
        int Mull = 1;
        if(((text.getText()).indexOf(".")<1)&&(Integer.parseInt(text.getText())>0)){
           int x = Integer.parseInt(text.getText());
           for(int i=1;i<=x;i++){
              Mull = Mull*i;
           }
         text.setText(String.valueOf(Mull));
         isResult = true;
        }
  }



}