frame1.java~94~

一个用java实现的计算器

package calculator;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import java.awt.Rectangle;
import javax.swing.JTextField;
import javax.swing.BorderFactory;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.*;
import java.awt.*;
import java.awt.event.KeyAdapter;
import javax.swing.UIManager;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2007</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class Frame1 extends JFrame {
    JPanel contentPane;
    JButton jButton1 = new JButton();
    JButton jButton2 = new JButton();
    JButton jButton3 = new JButton();
    JButton jButton4 = new JButton();
    JButton jButton5 = new JButton();
    JButton jButton6 = new JButton();
    JButton jButton7 = new JButton();
    JButton jButton8 = new JButton();
    JButton jButton9 = new JButton();
    JButton jButton10 = new JButton();
    JButton jButton11 = new JButton();
    JButton jButton12 = new JButton();
    JButton jButton13 = new JButton();
    JButton jButton14 = new JButton();
    JButton jButton15 = new JButton();
    JButton jButton16 = new JButton();
    JButton jButton17 = new JButton();
    JButton jButton18 = new JButton();
    JButton jButton19 = new JButton();
    JTextField readout = new JTextField();


    public Frame1() {
        try {

            setDefaultCloseOperation(EXIT_ON_CLOSE);
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    /**
     * Component initialization.
     *
     * @throws java.lang.Exception
     */
    String Op1,Op2;
    boolean Decimalflag;
    int numops;
    String lastinput;
    int opflag;
    String tempreadout;
    private void jbInit() throws Exception {
        contentPane = (JPanel) getContentPane();
        keylisten stli=new keylisten(this);
        contentPane.addKeyListener(stli);
        jButton1.addKeyListener(stli);
        jButton2.addKeyListener(stli);
        jButton3.addKeyListener(stli);
        jButton4.addKeyListener(stli);
        jButton5.addKeyListener(stli);
        jButton6.addKeyListener(stli);
        jButton7.addKeyListener(stli);
        jButton8.addKeyListener(stli);
        jButton9.addKeyListener(stli);
        jButton10.addKeyListener(stli);
        jButton11.addKeyListener(stli);
        jButton12.addKeyListener(stli);
        jButton13.addKeyListener(stli);
        jButton14.addKeyListener(stli);
        jButton15.addKeyListener(stli);
        jButton16.addKeyListener(stli);
        jButton17.addKeyListener(stli);
        jButton18.addKeyListener(stli);
        jButton19.addKeyListener(stli);
       contentPane.setLayout(null);
        setSize(new Dimension(400, 300));
        setTitle("简易计算器");
        jButton1.setBounds(new Rectangle(23, 41, 41, 29));
        jButton1.setText("7");
        jButton2.setBounds(new Rectangle(94, 41, 39, 29));
        jButton2.setText("8");
        jButton3.setBounds(new Rectangle(163, 41, 40, 29));
        jButton3.setText("9");
        jButton4.setBounds(new Rectangle(250, 41, 44, 29));
        jButton4.setText("C");
        jButton5.setBounds(new Rectangle(309, 41, 47, 28));
        jButton5.setText("CE");
        jButton6.setBounds(new Rectangle(22, 86, 39, 30));
        jButton6.setText("4");
        jButton7.setBounds(new Rectangle(94, 86, 38, 29));
        jButton7.setText("5");
        jButton8.setBounds(new Rectangle(163, 86, 40, 28));
        jButton8.setText("6");
        jButton9.setBounds(new Rectangle(250, 86, 44, 28));
        jButton9.setText("+");
        jButton10.setBounds(new Rectangle(309, 86, 47, 27));
        jButton10.setText("-");
        jButton11.setBounds(new Rectangle(22, 132, 39, 30));
        jButton11.setText("1");
        jButton12.setBounds(new Rectangle(94, 131, 38, 29));
        jButton12.setText("2");
        jButton13.setBounds(new Rectangle(163, 132, 40, 28));
        jButton13.setText("3");
        jButton14.setBounds(new Rectangle(250, 132, 44, 28));
        jButton14.setText("*");
        jButton15.setBounds(new Rectangle(310, 132, 47, 28));
        jButton15.setText("/");
        jButton16.setBounds(new Rectangle(23, 175, 107, 31));
        jButton16.setText("0");
        jButton17.setBounds(new Rectangle(163, 175, 40, 31));
        jButton17.setText(".");
        jButton18.setBounds(new Rectangle(250, 176, 43, 31));
        jButton18.setText("=");
         jButton18.requestFocus(true) ;
        jButton19.setText("%");
        readout.setBorder(BorderFactory.createLineBorder(Color.black));
        readout.setBounds(new Rectangle(23, 12, 332, 20));
        readout.setHorizontalAlignment(JTextField.RIGHT);
       // contentPane.setNextFocusableComponent(jButton18);
       // contentPane.setRequestFocusEnabled(false);
        //readout.setHorizontalAlignment(JTextField.RIGHT);
        //contentPane.setNextFocusableComponent(null);
        contentPane.setToolTipText("");
        contentPane.addKeyListener(new Frame1_contentPane_keyAdapter(this));
        jButton16.addActionListener(new Frame1_jButton16_actionAdapter(this));
        jButton11.addActionListener(new Frame1_jButton11_actionAdapter(this));
        jButton12.addActionListener(new Frame1_jButton12_actionAdapter(this));
        jButton13.addActionListener(new Frame1_jButton13_actionAdapter(this));
        jButton6.addActionListener(new Frame1_jButton6_actionAdapter(this));
        jButton7.addActionListener(new Frame1_jButton7_actionAdapter(this));
        jButton8.addActionListener(new Frame1_jButton8_actionAdapter(this));
        jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));
        jButton2.addActionListener(new Frame1_jButton2_actionAdapter(this));
        jButton3.addActionListener(new Frame1_jButton3_actionAdapter(this));
        jButton9.addActionListener(new Frame1_jButton9_actionAdapter(this));
        jButton10.addActionListener(new Frame1_jButton10_actionAdapter(this));
        jButton14.addActionListener(new Frame1_jButton14_actionAdapter(this));
        jButton15.addActionListener(new Frame1_jButton15_actionAdapter(this));
        jButton18.addActionListener(new Frame1_jButton18_actionAdapter(this));
        jButton19.addActionListener(new Frame1_jButton19_actionAdapter(this));
        jButton4.addActionListener(new Frame1_jButton4_actionAdapter(this));
        jButton5.addActionListener(new Frame1_jButton5_actionAdapter(this));
        jButton17.addActionListener(new Frame1_jButton17_actionAdapter(this));
        jButton19.setBounds(new Rectangle(313, 176, 47, 31));
        readout.setText("123");
        readout.setEditable(false);

        //jButton18.setNextFocusableComponent(this); //jButton16.setSelected(true);
        jButton18.setSelected(true); // jButton19.setNextFocusableComponent(jButton18);
        readout.setForeground(UIManager.getColor("Button.focus")); //jButton18.setNextFocusableComponent(this);
        contentPane.add(jButton13);
        contentPane.add(jButton18);
        contentPane.add(jButton16);
        contentPane.add(jButton5);
        contentPane.add(jButton9);
        contentPane.add(jButton4);
        contentPane.add(jButton17);
        contentPane.add(jButton7);
        contentPane.add(jButton2);
        contentPane.add(jButton1, null);
        contentPane.add(jButton3);
        contentPane.add(jButton6);
        contentPane.add(jButton8);
        contentPane.add(jButton10);
        contentPane.add(jButton14);
        contentPane.add(jButton15);
        contentPane.add(jButton12);
        contentPane.add(jButton11);
        contentPane.add(readout);
        contentPane.add(jButton19);
        Decimalflag=false;
        numops=0;
        lastinput="NONE";
        opflag=0;
        readout.setText("0.");

    }
    public void calculate(int Mynumber)
    {
        int index=Mynumber;

        if(lastinput!="NUM")
        {
            readout.setText("0.");
           Decimalflag=false;
        }
        String str="";
        str=readout.getText();
        if(Decimalflag==true)
        {
            readout.setText(readout.getText()+ Mynumber);

        }
        else
        {
            if (str.compareTo("0.")==0)
            {
                readout.setText("");
                readout.setText(Mynumber + ".");

            }
            else
            {
                   readout.setText(readout.getText().substring(0,
                        readout.getText().length() - 1) + Mynumber + ".");

            }
        }
           if(lastinput == "NEG")
           {
               readout.setText("-" + readout.getText());
           }
           lastinput="NUM";
   jButton18.requestFocus();
    }
    public void operator(int Myoperator)
    {
        int index = Myoperator;
        tempreadout=readout.getText();
        if(lastinput == "NUM")
        {
           numops=numops+1;
        }
        String myop;
       //
       switch(numops)
       {
       case 0:
           if(Myoperator==3 && lastinput!= "NEG")
           {
               readout.setText("-"+readout.getText());
               lastinput="NEG";
           }
          break;
          case 1:
              Op1=readout.getText() ;
              if(Myoperator==3&&lastinput!="NUM"&&opflag!=4)
              {
                  readout.setText("-");
                  lastinput="NEG";
              }
              break;
              case 2:
                  Op2=tempreadout;
                  switch (opflag)
                  {
                   case 0:
                       if(Double.parseDouble(Op2)==0)
                       {

                       }
                       else
                       {
                      Op1=""+(Double.parseDouble(Op1)/Double.parseDouble(Op2));
                       }
                       break;
                       case 1:
                       Op1=""+(Double.parseDouble(Op1)+Double.parseDouble(Op2));
                       break;
                       case 2:
                       Op1=""+(Double.parseDouble(Op1)*Double.parseDouble(Op2));
                       break;
                       case 3:
                       Op1=""+(Double.parseDouble(Op1)-Double.parseDouble(Op2));
                       break;
                       case 4:
                        Op1=Op2;
                  }
                  readout.setText(Op1);
                  numops=1;

                  break;

       }
       if(lastinput!="NEG")
       {
           lastinput="OPS";
           opflag=Myoperator;

       }
        jButton18.requestFocus();
    }

    public void jButton16_actionPerformed(ActionEvent e) {
     this.calculate(0);
      jButton18.requestFocus();
    }

    public void jButton11_actionPerformed(ActionEvent e) {
      this.calculate(1);
       jButton18.requestFocus();
    }

    public void jButton12_actionPerformed(ActionEvent e) {
     this.calculate(2);
      jButton18.requestFocus();
    }

    public void jButton13_actionPerformed(ActionEvent e) {
            this.calculate(3);
             jButton18.requestFocus();
    }

    public void jButton6_actionPerformed(ActionEvent e) {
       this.calculate(4);
        jButton18.requestFocus();
    }

    public void jButton7_actionPerformed(ActionEvent e) {
        this.calculate(5);
         jButton18.requestFocus();
    }

    public void jButton8_actionPerformed(ActionEvent e) {
       this.calculate(6);
        jButton18.requestFocus();
    }

    public void jButton1_actionPerformed(ActionEvent e) {
         this.calculate(7);
          jButton18.requestFocus();
    }

    public void jButton2_actionPerformed(ActionEvent e) {
       this.calculate(8);
        jButton18.requestFocus();
    }

    public void jButton3_actionPerformed(ActionEvent e) {
         this.calculate(9);
    }

    public void jButton9_actionPerformed(ActionEvent e) {
      this.operator(1);
       jButton18.requestFocus();
    }

    public void jButton10_actionPerformed(ActionEvent e) {
   this.operator(3);
    jButton18.requestFocus();
    }

    public void jButton14_actionPerformed(ActionEvent e) {
    this.operator(2);
     jButton18.requestFocus();
    }

    public void jButton15_actionPerformed(ActionEvent e) {
         this.operator(0);
          jButton18.requestFocus();
    }

    public void jButton18_actionPerformed(ActionEvent e) {
     this.operator(4);
      jButton18.requestFocus();
    }
 public void percent()
 {
     readout.setText(""+Double.parseDouble(readout.getText())/100);
            lastinput="OPS";
            numops=numops+1;
            Decimalflag=true;